4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride

Endpoint summary

Description of key information

Acute Oral Toxicity:

The LD50 was estimated to be 26631 mg/kg bw,when male and female Sprague-Dawley rats were orally exposed with 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride.

Acute Dermal Toxicity:

The LD50 was estimated to be 2713 mg/kg bw,when male New Zealand White rabbits were exposed with 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7) by dermal application.

Key value for chemical safety assessment

Acute toxicity: via oral route

Link to relevant study records

Reference

Endpoint:

acute toxicity: oral

Type of information:

(Q)SAR

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

results derived from a valid (Q)SAR model and falling into its applicability domain, with limited documentation / justification

Justification for type of information:

Data is predicted using OECD QSAR toolbox version 3.3 and QMRF report has been attached

Qualifier:

according to guideline

Guideline:

other: As mentioned below

Principles of method if other than guideline:

Prediction was done by using OECD QSAR toolbox v3.3,2017

GLP compliance:

not specified

Test type:

other: Estimated data

Limit test:

no

Specific details on test material used for the study:

- Name of test material: C.I. Basic Violet 2 / (4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride)
- IUPAC name: 4-[(4-amino-3-methylphenyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-2-methylaniline hydrochloride
- Molecular formula: C22H24ClN3
- Molecular weight: 365.906 g/mole
- Smiles :C(\c1cc(c(N)cc1)C)(c1cc(c(N)cc1)C)=C1\C=C(C(=[NH+])C=C1)C.[ClH-]
- Inchl: 1S/C22H23N3.ClH/c1-13-10-16(4-7-19(13)23)22(17-5-8-20(24)14(2)11-17)18-6-9-21(25)15(3)12-18;/h4-12,23H,24-25H2,1-3H3;1H
- Substance type: Organic
- Physical state: Solid Green crystalline powder

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

No data available

Route of administration:

oral: gavage

Vehicle:

unchanged (no vehicle)

Details on oral exposure:

No data available

Doses:

26631 mg/kg bw

No. of animals per sex per dose:

5 male and 5 female

Control animals:

not specified

Details on study design:

No data available

Statistics:

No data available

Preliminary study:

No data available

Sex:

male/female

Dose descriptor:

LD50

Effect level:

26 631 mg/kg bw

Based on:

test mat.

Remarks on result:

other: 50% Mortality was observed

Mortality:

No data available

Clinical signs:

other: No data available

Gross pathology:

No data available

Other findings:

No data available

The prediction was based on dataset comprised from the following descriptors: LD50
Estimation method: Takes average value from the 12 nearest neighbours
Domain  logical expression:Result: In Domain

((((((((((((("a" or "b" or "c" or "d" or "e" )  and ("f" and ( not "g") )  )  and ("h" and ( not "i") )  )  and ("j" and ( not "k") )  )  and ("l" and ( not "m") )  )  and "n" )  and "o" )  and "p" )  and "q" )  and ("r" and ( not "s") )  )  and ("t" and ( not "u") )  )  and "v" )  and ("w" and "x" )  )

Domain logical expression index: "a"

Referential boundary: The target chemical should be classified as Anilines (Acute toxicity) AND Dianilines AND Not categorized AND Triarylmethane Pigments/Dyes with Non-solubilizing Groups by US-EPA New Chemical Categories

Domain logical expression index: "b"

Referential boundary: The target chemical should be classified as Anilines (Hindered) AND Inorganic Compound by Aquatic toxicity classification by ECOSAR

Domain logical expression index: "c"

Referential boundary: The target chemical should be classified as Alkene OR Alkyl arenes OR Allyl OR Aniline OR Aryl OR Dianilines OR Ketimine OR No functional group found OR Precursors quinoid compounds by Organic Functional groups ONLY

Domain logical expression index: "d"

Referential boundary: The target chemical should be classified as Alkene OR Alkyl arenes OR Allyl OR Dianilines OR Ketimine OR No functional group found OR Overlapping groups OR Precursors quinoid compounds by Organic Functional groups (nested) ONLY

Domain logical expression index: "e"

Referential boundary: The target chemical should be classified as Aliphatic Carbon [CH] OR Aliphatic Carbon [-CH2-] OR Aliphatic Carbon [-CH3] OR Aliphatic Nitrogen, one aromatic attach [-N] OR Aromatic Carbon [C] OR No functional group found OR Olefinic carbon [=CH- or =C<] by Organic functional groups (US EPA) ONLY

Domain logical expression index: "f"

Referential boundary: The target chemical should be classified as No alert found AND Non-specific AND Non-specific >> Incorporation into DNA/RNA, due to structural analogy with  nucleoside bases    AND Non-specific >> Incorporation into DNA/RNA, due to structural analogy with  nucleoside bases    >> Specific Imine and Thione Derivatives AND Radical AND Radical >> Radical mechanism via ROS formation (indirect) AND Radical >> Radical mechanism via ROS formation (indirect) >> Specific Imine and Thione Derivatives AND SN1 AND SN1 >> Nucleophilic substitution on diazonium ions AND SN1 >> Nucleophilic substitution on diazonium ions >> Specific Imine and Thione Derivatives by DNA binding by OASIS v.1.3

Domain logical expression index: "g"

Referential boundary: The target chemical should be classified as AN2 OR AN2 >> Carbamoylation after isocyanate formation OR AN2 >> Carbamoylation after isocyanate formation >> N-Hydroxylamines OR Radical >> Radical mechanism via ROS formation (indirect) >> N-Hydroxylamines OR Radical >> Radical mechanism via ROS formation (indirect) >> Single-Ring Substituted Primary Aromatic Amines OR SN1 >> Alkylation after metabolically formed carbenium ion species OR SN1 >> Alkylation after metabolically formed carbenium ion species >> Polycyclic Aromatic Hydrocarbon Derivatives OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation >> N-Hydroxylamines OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation >> Single-Ring Substituted Primary Aromatic Amines OR SN2 OR SN2 >> Alkylation, direct acting epoxides and related OR SN2 >> Alkylation, direct acting epoxides and related >> Epoxides and Aziridines OR SN2 >> Alkylation, direct acting epoxides and related after P450-mediated metabolic activation OR SN2 >> Alkylation, direct acting epoxides and related after P450-mediated metabolic activation >> Polycyclic Aromatic Hydrocarbon Derivatives by DNA binding by OASIS v.1.3

Domain logical expression index: "h"

Referential boundary: The target chemical should be classified as No alert found AND SN1 AND SN1 >> Nitrenium Ion formation AND SN1 >> Nitrenium Ion formation >> Primary aromatic amine by DNA binding by OECD

Domain logical expression index: "i"

Referential boundary: The target chemical should be classified as Michael addition OR Michael addition >> P450 Mediated Activation to Quinones and Quinone-type Chemicals OR Michael addition >> P450 Mediated Activation to Quinones and Quinone-type Chemicals >> Alkyl phenols OR Michael addition >> P450 Mediated Activation to Quinones and Quinone-type Chemicals >> Arenes OR Michael addition >> P450 Mediated Activation to Quinones and Quinone-type Chemicals >> Hydroquinones OR Michael addition >> P450 Mediated Activation to Quinones and Quinone-type Chemicals >> Polycyclic (PAHs) and heterocyclic (HACs) aromatic hydrocarbons-Michael addition OR SN1 >> Nitrenium Ion formation >> Secondary aromatic amine OR SN1 >> Nitrenium Ion formation >> Tertiary aromatic amine by DNA binding by OECD

Domain logical expression index: "j"

Referential boundary: The target chemical should be classified as Non binder, non cyclic structure AND Strong binder, NH2 group by Estrogen Receptor Binding

Domain logical expression index: "k"

Referential boundary: The target chemical should be classified as Moderate binder, NH2 group OR Non binder, impaired OH or NH2 group OR Non binder, MW>500 OR Non binder, without OH or NH2 group OR Very strong binder, OH group OR Weak binder, NH2 group OR Weak binder, OH group by Estrogen Receptor Binding

Domain logical expression index: "l"

Referential boundary: The target chemical should be classified as No alert found by Protein binding alerts for skin sensitization by OASIS v1.3

Domain logical expression index: "m"

Referential boundary: The target chemical should be classified as Acylation OR Acylation >> Direct acylation involving a leaving group OR Acylation >> Direct acylation involving a leaving group >> (Thio)Acyl and (thio)carbamoyl halides and cyanides  by Protein binding alerts for skin sensitization by OASIS v1.3

Domain logical expression index: "n"

Referential boundary: The target chemical should be classified as Bioavailable by Lipinski Rule Oasis ONLY

Domain logical expression index: "o"

Referential boundary: The target chemical should be classified as Alkene AND Alkyl arenes AND Allyl AND Aniline AND Aryl AND Dianilines AND Ketimine AND No functional group found AND Precursors quinoid compounds by Organic Functional groups ONLY

Domain logical expression index: "p"

Referential boundary: The target chemical should be classified as Aliphatic Carbon [CH] AND Aliphatic Carbon [-CH2-] AND Aliphatic Carbon [-CH3] AND Aliphatic Nitrogen, one aromatic attach [-N] AND Aromatic Carbon [C] AND No functional group found AND Olefinic carbon [=CH- or =C<] by Organic functional groups (US EPA) ONLY

Domain logical expression index: "q"

Referential boundary: The target chemical should be classified as Amine AND Aromatic compound AND No functional group found AND Primary amine AND Primary aromatic amine by Organic functional groups, Norbert Haider (checkmol) ONLY

Domain logical expression index: "r"

Referential boundary: The target chemical should be classified as Aromatic Amine Type Compounds AND Halogenated Cycloalkane Type Compounds by Oncologic Primary Classification

Domain logical expression index: "s"

Referential boundary: The target chemical should be classified as Siloxane Type Compounds by Oncologic Primary Classification

Domain logical expression index: "t"

Referential boundary: The target chemical should be classified as (!Undefined)Group All Lipid Solubility < 0.01 g/kg AND (!Undefined)Group CN Lipid Solubility < 0.4 g/kg AND Exclusion rules not met AND Group All Melting Point > 200 C AND Group CN Aqueous Solubility < 0.1 g/L AND Group CN log Kow > 4.5 AND Group CN Molecular Weight > 290 g/mol by Eye irritation/corrosion Exclusion rules by BfR

Domain logical expression index: "u"

Referential boundary: The target chemical should be classified as Group C Aqueous Solubility < 0.0005 g/L by Eye irritation/corrosion Exclusion rules by BfR

Domain logical expression index: "v"

Referential boundary: The target chemical should be classified as Mixture by Substance Type ONLY

Domain logical expression index: "w"

Parametric boundary:The target chemical should have a value of log Kow which is >= 2.31

Domain logical expression index: "x"

Parametric boundary:The target chemical should have a value of log Kow which is <= 3.29

Interpretation of results:

Category 5 based on GHS criteria

Conclusions:

The LD50 was estimated to be 26631 mg/kg bw,when male and female Sprague-Dawley rats were orally exposed with 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride.

Executive summary:

In a prediction done by SSS (2017) using the OECD QSAR toolbox with log kow as the primary descriptor, the acute oral toxicity was estimated for 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride. The LD50 was estimated to be 26631 mg/kg bw when rats were orally exposed with 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

LD50

Value:

26 631 mg/kg bw

Quality of whole database:

Data is Klimicsh 2 and from QSAR Toolbox 3.3. (2017)

Acute toxicity: via inhalation route

Endpoint conclusion

Endpoint conclusion:

no study available

Acute toxicity: via dermal route

Link to relevant study records

Reference

Endpoint:

acute toxicity: dermal

Type of information:

(Q)SAR

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

results derived from a valid (Q)SAR model and falling into its applicability domain, with limited documentation / justification

Justification for type of information:

Data is predicted using OECD QSAR toolbox version 3.3 and QMRF report has been attached

Qualifier:

according to guideline

Guideline:

other: as mentioned below

Principles of method if other than guideline:

Prediction was done by using OECD QSAR toolbox v3.3,2017

GLP compliance:

not specified

Test type:

other: Estimated data

Limit test:

no

Specific details on test material used for the study:

- Name of test material: C.I. Basic Violet 2 / (4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride)
- IUPAC name: 4-[(4-amino-3-methylphenyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-2-methylaniline hydrochloride
- Molecular formula: C22H24ClN3
- Molecular weight: 365.906 g/mole
- Smiles :C(\c1cc(c(N)cc1)C)(c1cc(c(N)cc1)C)=C1\C=C(C(=[NH+])C=C1)C.[ClH-]
- Inchl: 1S/C22H23N3.ClH/c1-13-10-16(4-7-19(13)23)22(17-5-8-20(24)14(2)11-17)18-6-9-21(25)15(3)12-18;/h4-12,23H,24-25H2,1-3H3;1H
- Substance type: Organic
- Physical state: Solid Green crystalline powder

Species:

rabbit

Strain:

New Zealand White

Sex:

male

Details on test animals or test system and environmental conditions:

No data available

Type of coverage:

other: Dermal

Vehicle:

unchanged (no vehicle)

Details on dermal exposure:

No data available

Duration of exposure:

No data available

Doses:

2713 mg/kg bw

No. of animals per sex per dose:

12 (main study)

Control animals:

not specified

Details on study design:

No data available

Statistics:

No data available

Preliminary study:

No data available

Sex:

male

Dose descriptor:

LD50

Effect level:

2 713 mg/kg bw

Based on:

test mat.

Remarks on result:

other: 50% mortality was observed

Mortality:

No data available

Clinical signs:

other: No data available

Gross pathology:

No data available

Other findings:

No data available

The prediction was based on dataset comprised from the following descriptors: LD50
Estimation method: Takes average value from the 7 nearest neighbours
Domain  logical expression:Result: In Domain

((((((((("a" or "b" or "c" or "d" or "e" )  and ("f" and ( not "g") )  )  and ("h" and ( not "i") )  )  and ("j" and ( not "k") )  )  and "l" )  and ("m" and ( not "n") )  )  and "o" )  and ("p" and ( not "q") )  )  and ("r" and "s" )  )

Domain logical expression index: "a"

Referential boundary: The target chemical should be classified as Anilines (Acute toxicity) AND Dianilines AND Not categorized AND Triarylmethane Pigments/Dyes with Non-solubilizing Groups by US-EPA New Chemical Categories

Domain logical expression index: "b"

Referential boundary: The target chemical should be classified as Anilines (Hindered) AND Inorganic Compound by Aquatic toxicity classification by ECOSAR

Domain logical expression index: "c"

Referential boundary: The target chemical should be classified as Alkene OR Alkyl arenes OR Allyl OR Aniline OR Aryl OR Dianilines OR Ketimine OR No functional group found OR Precursors quinoid compounds by Organic Functional groups ONLY

Domain logical expression index: "d"

Referential boundary: The target chemical should be classified as Alkene OR Alkyl arenes OR Allyl OR Dianilines OR Ketimine OR No functional group found OR Overlapping groups OR Precursors quinoid compounds by Organic Functional groups (nested) ONLY

Domain logical expression index: "e"

Referential boundary: The target chemical should be classified as Aliphatic Carbon [CH] OR Aliphatic Carbon [-CH2-] OR Aliphatic Carbon [-CH3] OR Aliphatic Nitrogen, one aromatic attach [-N] OR Aromatic Carbon [C] OR No functional group found OR Olefinic carbon [=CH- or =C<] by Organic functional groups (US EPA) ONLY

Domain logical expression index: "f"

Referential boundary: The target chemical should be classified as No alert found AND Non-specific AND Non-specific >> Incorporation into DNA/RNA, due to structural analogy with  nucleoside bases    AND Non-specific >> Incorporation into DNA/RNA, due to structural analogy with  nucleoside bases    >> Specific Imine and Thione Derivatives AND Radical AND Radical >> Radical mechanism via ROS formation (indirect) AND Radical >> Radical mechanism via ROS formation (indirect) >> Specific Imine and Thione Derivatives AND SN1 AND SN1 >> Nucleophilic substitution on diazonium ions AND SN1 >> Nucleophilic substitution on diazonium ions >> Specific Imine and Thione Derivatives by DNA binding by OASIS v.1.3

Domain logical expression index: "g"

Referential boundary: The target chemical should be classified as AN2 OR AN2 >> Carbamoylation after isocyanate formation OR AN2 >> Carbamoylation after isocyanate formation >> N-Hydroxylamines OR Radical >> Radical mechanism via ROS formation (indirect) >> N-Hydroxylamines OR Radical >> Radical mechanism via ROS formation (indirect) >> Single-Ring Substituted Primary Aromatic Amines OR SN1 >> Alkylation after metabolically formed carbenium ion species OR SN1 >> Alkylation after metabolically formed carbenium ion species >> Polycyclic Aromatic Hydrocarbon Derivatives OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation >> N-Hydroxylamines OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation >> Single-Ring Substituted Primary Aromatic Amines OR SN2 OR SN2 >> Alkylation, direct acting epoxides and related OR SN2 >> Alkylation, direct acting epoxides and related >> Epoxides and Aziridines OR SN2 >> Alkylation, direct acting epoxides and related after P450-mediated metabolic activation OR SN2 >> Alkylation, direct acting epoxides and related after P450-mediated metabolic activation >> Polycyclic Aromatic Hydrocarbon Derivatives by DNA binding by OASIS v.1.3

Domain logical expression index: "h"

Referential boundary: The target chemical should be classified as No alert found AND SN1 AND SN1 >> Nitrenium Ion formation AND SN1 >> Nitrenium Ion formation >> Primary aromatic amine by DNA binding by OECD

Domain logical expression index: "i"

Referential boundary: The target chemical should be classified as Michael addition OR Michael addition >> P450 Mediated Activation to Quinones and Quinone-type Chemicals OR Michael addition >> P450 Mediated Activation to Quinones and Quinone-type Chemicals >> Alkyl phenols OR Michael addition >> P450 Mediated Activation to Quinones and Quinone-type Chemicals >> Arenes OR Michael addition >> P450 Mediated Activation to Quinones and Quinone-type Chemicals >> Hydroquinones OR SN1 >> Nitrenium Ion formation >> Secondary aromatic amine OR SN1 >> Nitrenium Ion formation >> Tertiary aromatic amine by DNA binding by OECD

Domain logical expression index: "j"

Referential boundary: The target chemical should be classified as (!Undefined)Group All Lipid Solubility < 0.01 g/kg AND (!Undefined)Group CN Lipid Solubility < 0.4 g/kg AND Exclusion rules not met AND Group All Melting Point > 200 C AND Group CN Aqueous Solubility < 0.1 g/L AND Group CN log Kow > 4.5 AND Group CN Melting Point > 180 C AND Group CN Molecular Weight > 290 g/mol AND Group CN Vapour Pressure < 0.001 Pa by Skin irritation/corrosion Exclusion rules by BfR

Domain logical expression index: "k"

Referential boundary: The target chemical should be classified as (!Undefined)Group All log Kow < -3.1 OR (!Undefined)Group All log Kow > 9 OR (!Undefined)Group All Melting Point > 200 C OR (!Undefined)Group C Surface Tension > 62 mN/m OR (!Undefined)Group CN Melting Point > 180 C OR (!Undefined)Group CN Vapour Pressure < 0.001 Pa OR Group All log Kow > 9 OR Group C Aqueous Solubility < 0.0001 g/L OR Group C Melting Point > 55 C OR Group C Molecular Weight > 350 g/mol OR Group C Vapour Pressure < 0.0001 Pa by Skin irritation/corrosion Exclusion rules by BfR

Domain logical expression index: "l"

Referential boundary: The target chemical should be classified as Bioavailable by Lipinski Rule Oasis ONLY

Domain logical expression index: "m"

Referential boundary: The target chemical should be classified as Halogens AND Non-Metals by Groups of elements

Domain logical expression index: "n"

Referential boundary: The target chemical should be classified as Alkali Earth OR Alkaline Earth OR Metalloids OR Metals OR Rare Earth OR Transition Metals by Groups of elements

Domain logical expression index: "o"

Referential boundary: The target chemical should be classified as Alkene AND Alkyl arenes AND Allyl AND Aniline AND Aryl AND Dianilines AND Ketimine AND No functional group found AND Precursors quinoid compounds by Organic Functional groups ONLY

Domain logical expression index: "p"

Referential boundary: The target chemical should be classified as No alert found by Protein binding alerts for skin sensitization by OASIS v1.3

Domain logical expression index: "q"

Referential boundary: The target chemical should be classified as Acylation OR Acylation >> Direct acylation involving a leaving group OR Acylation >> Direct acylation involving a leaving group >> (Thio)Acyl and (thio)carbamoyl halides and cyanides  by Protein binding alerts for skin sensitization by OASIS v1.3

Domain logical expression index: "r"

Parametric boundary:The target chemical should have a value of log Kow which is >= 0.386

Domain logical expression index: "s"

Parametric boundary:The target chemical should have a value of log Kow which is <= 4.02

Interpretation of results:

Category 5 based on GHS criteria

Conclusions:

The LD50 was estimated to be 2713 mg/kg bw,when male New Zealand White rabbits were exposed with 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7) by dermal application.

Executive summary:

In a prediction done by SSS (2017) using the OECD QSAR toolbox with log kow as the primary descriptor, the acute dermal toxicity was estimated for 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7) ,LD50 was estimated to be 2713 mg/kg bw. When male rabbits were exposed with4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride (3248-91-7)  by dermal application.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

LD50

Value:

2 713 mg/kg bw

Quality of whole database:

Data is Klimicsh 2 and from QSAR Toolbox 3.3. (2017)

Additional information

Acute Oral Toxicity:

In different studies, 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7) has been investigated for acute oral toxicity to a greater or lesser extent. Often are the studies based on in vivo experiments and estimated data in rodents, i.e. most commonly in rats 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7).The predicted data using the OECD QSAR toolbox has also been compared with the experimental studies.

In a prediction done by SSS (2017) using the OECD QSAR toolbox with log kow as the primary descriptor, the acute oral toxicity was estimated for 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7). The LD50 was estimated to be 26631 mg/kg bw,when male and female Sprague-Dawley rats were orally exposed with 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride.

In another experimental study conducted by Scientific Committee On Consumer Products – SCCP and Committee On Cosmetic Products And Non-Food Products (SCCNFP)(SCIENTIFIC COMMITTEE ON CONSUMER PRODUCTS – SCCP, COLIPA no B115, during 12th plenary meeting of 20 September 2011 and RTC (Research Toxicology Centre, Roma), 7121/T/213/99, October 02, 2002) for the substance 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7). In acute oral toxicity study, 5 males and 5 females Sprague Dawley rats per group were treated with 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride (3248-91-7) with dose level of 500,1000 and 2000 mg/kg bw.0.5% CMC aqueous solution was used as a vehicle.3 males died within 5 days of dosing. At 2000 mg/kg bw, 1 male and 1 female died within 48 hours of dosing. No mortalities were observed at 500, 1000 mg/kg bw dose levels.Clinical signs at 2000 mg/kg bw observed were piloerection, reduced activity, hunched posture, breathing difficulties, staining of fur, urine and faeces, swollen abdomen. Therefore, Lethal dose (LD50) was considered to be >2000 mg/kg bw when rats were treated with 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride orally.

Also these results are further supported by the experimental study conducted by U.S. National Library of Medicine (ChemIDplusA TOXNET Database, 2017) for the structurally similar read across substance C.I. Basic Red 9 (569-61-9). Acute oral toxicity study was done in mouse using test material C.I. Basic Red 9 (569-61-9).50% Mortality was observed at dose 5000 mg/kg bw.Hence,LD50 was considered to be 5000mg/kg body weight when Mouse was treated with C.I. Basic Red 9 (569-61-9) orally.

Also these results are further supported by the experimental study conducted by Environment and Quality of Life - Reports (Seventh Series) (Environment and Quality of Life - Reports (Seventh Series) For Basic Violet 14, Environment and Quality of Life - Reports (Seventh Series) For Basic Violet 14,1988) for the substance 4-[(4-aminophenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]aniline hydrochloride (632-99-5). Acute oral toxicity study was done in rat using test material 4-(4-aminophenyl)(4-iminocyclohexa-2,5-dienylidene)methyl)-2-methylaniline hydrochloride (632-99-5). Carboxymethyl cellulose(40% suspension) is used as vehicle. No Mortality was observed at dose 12000 mg/kg bw.Hence,LD50 was considered to be 12000 mg/kg body weight, when rats were treated with 4-(4-aminophenyl)(4-iminocyclohexa-2,5-dienylidene)methyl)-2-methylaniline hydrochloride (632-99-5) orally.

Thus, based on the above studies and predictions on 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7) and its read across substances, it can be concluded that LD50 value was 26631 mg/kg bw. Thus, comparing this value with the criteria of CLP  regulation ,4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7) can be “Not classified” for acute oral toxicity.

 

Acute Dermal Toxicity:

In different studies, 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7) has been investigated for acute dermal toxicity to a greater or lesser extent. Often are the studies based on in vivo experiments and estimated data in rodents, i.e. most commonly in rats for 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7).The predicted data using the OECD QSAR toolbox has also been compared with the experimental studies.

In a prediction done by SSS (2017) using the OECD QSAR toolbox with log kow as the primary descriptor, the acute dermal toxicity was estimated for 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7). The LD50 was estimated to be 2713 mg/kg bw,when male New Zealand White rabbits were exposed with 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7) by dermal application.

Thus, based on the above studies on 4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7), it can be concluded that LD50 value was 2731 mg/kg bw. Thus, comparing this value with the criteria of CLP  regulation ,4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7) can be “Not classified” for Acute Oral and Dermal toxicity.

Justification for classification or non-classification

Thus, comparing this value with the criteria of CLP  regulation,4-[(4-amino-m-tolyl)(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-o-toluidine monohydrochloride(3248-91-7) can be “Not classified” for Acute Oral and Dermal toxicity.