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Administrative data

Description of key information

Acute Oral Toxicity: 

In Acute oral toxicity ,LD50 value was predicted based on OECD QSAR toolbox for target substance 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid (94022-69-4) was estimated to be 8717.93 mg/kg bw,and for different studies available on the structurally similar read across substance 2,7 Naphthalendisulfonic acid (3861-73-2) was considered to be >5000 mg/kg bw and for 1,5-Naphthalenedisulfonicacid, 2-(6-(4,6-dichlorostriazinyl) methylamino-1-hydroxy-3-sulfonaphthylazo)-) (73816-75-8) was considered to be 8500 mg/kg bw. All these studies concluded that the LD50 value is greater than 2000 mg/kg bw. Thus, comparing this value with the criteria of CLP regulation, 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid (94022-69-4) cannot be classified for acute oral toxicity.

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 3.4 and QMRF report has been attached
Reference:
Composition 0
Qualifier:
according to
Guideline:
other: as mentioned below
Principles of method if other than guideline:
Prediction was done by using OECD QSAR toolbox v3.4,2018
GLP compliance:
not specified
Test type:
other: estimated data
Limit test:
no
Test material information:
Composition 1
Specific details on test material used for the study:
- Name of test material: 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid
- IUPAC name: 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid
- Molecular formula: C60H40Cl2N14O26S8
- Molecular weight: 1700.482 g/mole
- Smiles c1ccc2c(c1)ccc(c2S(=O)(=O)O)/N=N/c3c(cc4cc(cc(c4c3O)Nc5nc(nc(n5)Cl)Nc6ccc(c(c6)S(=O)(=O)O)/C=C/c7c(cccc7S(=O)(=O)O)Nc8nc (nc(n8)Cl)Nc9cc(cc1c9c(c(c(c1)S(=O)(=O)O)/N=N/c1ccc2ccccc2c1S(=O)(=O)O)O)S(=O)(=O)O)S(=O)(=O)O)S(=O)(=O)O
- Inchl: 1S/C60H40Cl2N14O26S8/c61-55-67-57(71-59(69-55)65-41-25-33(103(79,80)81)20-30-22-45(107(91,92)93)49(51(77)47(30)41)75-73-39-18-14-27-6-1-3-8-35(27)53(39)109(97,98)99)63-32-16-12-29(44(24-32)106(88,89)90)13-17-37-38(10-5-11-43(37)105(85,86)87)64-58-68-56(62)70-60(72-58)66-42-26-34(104(82,83)84)21-31-23-46(108(94,95)96)50(52(78)48(31)42)76-74-40-19-15-28-7-2-4-9-36(28)54(40)110(100,101)102/h1-26,77-78H,(H,79,80,81)(H,82,83,84)(H,85,86,87)(H,88,89,90)(H,91,92,93)(H,94,95,96)(H,97,98,99)(H,100,101,102)(H2,63,65,67,69,71)(H2,64,66,68,70,72)/b17-13+,75-73+,76-74+
- Substance type: Organic
- Physical state: Solid
Species:
rat
Strain:
Wistar
Sex:
male/female
Details on test animals and environmental conditions:
no data available
Route of administration:
oral: gavage
Vehicle:
unchanged (no vehicle)
Details on oral exposure:
no data available
Doses:
8717.93 mg/kg bw
No. of animals per sex per dose:
no data available
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:
8 717.93 mg/kg bw
Based on:
test mat.
Remarks on result:
other: 50% mortality was observed
Mortality:
no data available
Clinical signs:
no data available
Body weight:
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 6 nearest neighbours
Domain  logical expression:Result: In Domain

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

Domain logical expression index: "a"

Referential boundary: The target chemical should be classified as Aromatic compound OR Azo compound OR Halogen derivative OR Hydroxy compound OR Phenol OR Sulfonic acid OR Sulfonic acid derivative by Organic functional groups, Norbert Haider (checkmol) ONLY

Domain logical expression index: "b"

Referential boundary: The target chemical should be classified as Alcohol, olefinic attach [-OH] OR Aliphatic Nitrogen, one aromatic attach [-N] OR Aliphatic Nitrogen, two aromatic attach [-N-] OR Amino Triazine/Pyrazine/Pyrimidine  OR Aromatic Carbon [C] OR Aromatic Nitrogen OR Azo [-N=N-] OR Chlorine, aromatic attach [-Cl] OR Chlorine, olefinic attach [-Cl] OR Hydroxy, aromatic attach [-OH] OR Hydroxy, sulfur attach [-OH] OR Miscellaneous sulfide (=S) or oxide (=O) OR Nitrogen, two or tree olefinic attach [>N-] OR Olefinic carbon [=CH- or =C<] OR Oxygen, one aromatic attach [-O-] OR Suflur {v+4} or {v+6} OR Sulfinic acid [-S(=O)OH] OR Sulfonate, aromatic attach [-SO2-O] OR Sym-Triazine ring  by Organic functional groups (US EPA) ONLY

Domain logical expression index: "c"

Referential boundary: The target chemical should be classified as Alkene OR Aromatic amine OR Aromatic heterocyclic halide OR Aryl OR Aryl halide OR Azo OR Fused carbocyclic aromatic OR Overlapping groups OR Phenol OR Sulfonic acid by Organic Functional groups (nested) ONLY

Domain logical expression index: "d"

Referential boundary: The target chemical should be classified as Alkene OR Aromatic amine OR Aromatic heterocyclic halide OR Aryl OR Aryl halide OR Azo OR Fused carbocyclic aromatic OR Naphtalene OR Phenol OR Sulfonic acid OR Triazine by Organic Functional groups ONLY

Domain logical expression index: "e"

Referential boundary: The target chemical should be classified as No alert found by DNA binding by OASIS v.1.4

Domain logical expression index: "f"

Referential boundary: The target chemical should be classified as AN2 OR AN2 >>  Michael-type addition, quinoid structures OR AN2 >>  Michael-type addition, quinoid structures >> Quinone methides OR AN2 >>  Michael-type addition, quinoid structures >> Quinoneimines OR AN2 >>  Michael-type addition, quinoid structures >> Quinones and Trihydroxybenzenes OR AN2 >> Nucleophilic addition reaction with cycloisomerization OR AN2 >> Nucleophilic addition reaction with cycloisomerization >> Hydrazine Derivatives OR AN2 >> Nucleophilic addition to alpha, beta-unsaturated carbonyl compounds OR AN2 >> Nucleophilic addition to alpha, beta-unsaturated carbonyl compounds >> Alpha, Beta-Unsaturated Aldehydes OR AN2 >> Schiff base formation OR AN2 >> Schiff base formation >> Alpha, Beta-Unsaturated Aldehydes OR AN2 >> Schiff base formation >> Polarized Haloalkene Derivatives OR AN2 >> Thioacylation via nucleophilic addition after cysteine-mediated thioketene formation OR AN2 >> Thioacylation via nucleophilic addition after cysteine-mediated thioketene formation >> Haloalkenes with Electron-Withdrawing Groups OR AN2 >> Thioacylation via nucleophilic addition after cysteine-mediated thioketene formation >> Polarized Haloalkene Derivatives OR Non-covalent interaction OR Non-covalent interaction >> DNA intercalation OR Non-covalent interaction >> DNA intercalation >> Fused-Ring Primary Aromatic Amines OR Non-covalent interaction >> DNA intercalation >> Polycyclic Aromatic Hydrocarbon and Naphthalenediimide Derivatives OR Non-covalent interaction >> DNA intercalation >> Quinones and Trihydroxybenzenes OR Non-specific OR Non-specific >> Incorporation into DNA/RNA, due to structural analogy with  nucleoside bases    OR Non-specific >> Incorporation into DNA/RNA, due to structural analogy with  nucleoside bases    >> Specific Imine and Thione Derivatives OR Radical OR Radical >> Radical mechanism via ROS formation (indirect) OR Radical >> Radical mechanism via ROS formation (indirect) >> Fused-Ring Primary Aromatic Amines OR Radical >> Radical mechanism via ROS formation (indirect) >> Hydrazine Derivatives OR Radical >> Radical mechanism via ROS formation (indirect) >> Quinones and Trihydroxybenzenes OR Radical >> Radical mechanism via ROS formation (indirect) >> Single-Ring Substituted Primary Aromatic Amines OR Radical >> Radical mechanism via ROS formation (indirect) >> Specific Imine and Thione Derivatives OR Radical >> Radical mechanism via ROS formation (indirect) >> Thiols OR Radical >> ROS formation after GSH depletion OR Radical >> ROS formation after GSH depletion (indirect) OR Radical >> ROS formation after GSH depletion (indirect) >> Quinoneimines OR Radical >> ROS formation after GSH depletion >> Quinone methides OR SN1 OR SN1 >> Alkylation after metabolically formed carbenium ion species OR SN1 >> Alkylation after metabolically formed carbenium ion species >> Polycyclic Aromatic Hydrocarbon and Naphthalenediimide Derivatives OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation >> Fused-Ring Primary Aromatic Amines OR SN1 >> Nucleophilic attack after nitrenium ion formation OR SN1 >> Nucleophilic attack after nitrenium ion formation >> Single-Ring Substituted Primary Aromatic Amines OR SN1 >> Nucleophilic substitution on diazonium ion OR SN1 >> Nucleophilic substitution on diazonium ion >> Specific Imine and Thione Derivatives 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 >> Haloalkenes with Electron-Withdrawing Groups OR SN2 >> Alkylation, direct acting epoxides and related after P450-mediated metabolic activation >> Polarized Haloalkene Derivatives OR SN2 >> Alkylation, direct acting epoxides and related after P450-mediated metabolic activation >> Polycyclic Aromatic Hydrocarbon and Naphthalenediimide Derivatives OR SN2 >> Direct acting epoxides formed after metabolic activation OR SN2 >> Direct acting epoxides formed after metabolic activation >> Quinoline Derivatives OR SN2 >> Direct nucleophilic attack on diazonium cation OR SN2 >> Direct nucleophilic attack on diazonium cation >> Hydrazine Derivatives OR SN2 >> SN2 at an activated carbon atom OR SN2 >> SN2 at an activated carbon atom >> Quinoline Derivatives OR SN2 >> SN2 at sp3 and activated sp2 carbon atom OR SN2 >> SN2 at sp3 and activated sp2 carbon atom >> Polarized Haloalkene Derivatives by DNA binding by OASIS v.1.4

Domain logical expression index: "g"

Referential boundary: The target chemical should be classified as Not known precedent reproductive and developmental toxic potential by DART scheme v.1.0

Domain logical expression index: "h"

Referential boundary: The target chemical should be classified as AhR binders.Polycyclic aromatic hydrocarbons (PAHs) (3b-3) OR Alkenes (23c) OR Inorganic chemical OR Known precedent reproductive and developmental toxic potential OR Metal atoms were identified OR Metals (1a) OR Non-steroid nucleus derived estrogen receptor (ER) and androgen receptor (AR) OR Non-steroid nucleus derived estrogen receptor (ER) and androgen receptor (AR) >> 4-alkylphenol-like derivatives (2b-3) OR Non-steroid nucleus derived estrogen receptor (ER) and androgen receptor (AR) >> Other non-steroidal estrogen receptor (ER) binding compounds (2b-2) OR Not covered by current version of the decision tree OR Polyhalogenated benzene derivatives (8c) OR Toluene and small alkyl toluene derivatives (8a) by DART scheme v.1.0

Domain logical expression index: "i"

Referential boundary: The target chemical should be classified as No alert found by Carcinogenicity (genotox and nongenotox) alerts by ISS

Domain logical expression index: "j"

Referential boundary: The target chemical should be classified as Acyl halides (Genotox) OR Aromatic diazo (Genotox) OR Aromatic mono-and dialkylamine (Genotox) OR Benzenesulfonic ethers, methylation (Nongenotox) OR Halogenated benzene (Nongenotox) OR Hydrazine (Genotox) OR o-phenylphenol (Nongenotox) OR Primary aromatic amine,hydroxyl amine and its derived esters (Genotox) OR Simple aldehyde (Genotox) OR Structural alert for genotoxic carcinogenicity OR Structural alert for nongenotoxic carcinogenicity OR Substituted n-alkylcarboxylic acids (Nongenotox) by Carcinogenicity (genotox and nongenotox) alerts by ISS

Domain logical expression index: "k"

Referential boundary: The target chemical should be classified as Not bioavailable by Lipinski Rule Oasis ONLY

Domain logical expression index: "l"

Similarity boundary:Target: Oc1c2c(Nc3nc(Nc4ccc(C=Cc5ccc(Nc6nc(Nc7cc(S(O)(=O)=O)cc8cc(S(O)(=O)=O)c(N=Nc9ccc%10ccccc%10c9S(O)(=O)=O)c(O)c78)nc(Cl)n6)c(S(O)(=O)=O)c5)cc4S(O)(=O)=O)nc(Cl)n3)cc(S(O)(=O)=O)cc2cc(S(O)(=O)=O)c1N=Nc1ccc2ccccc2c1S(O)(=O)=O
Threshold=10%,
Dice(Atom centered fragments)
Atom type; Count H attached; Hybridization

Domain logical expression index: "m"

Referential boundary: The target chemical should be classified as Not categorized by Repeated dose (HESS)

Domain logical expression index: "n"

Referential boundary: The target chemical should be classified as 3-Methylcholantrene (Hepatotoxicity) Alert by Repeated dose (HESS)

Domain logical expression index: "o"

Referential boundary: The target chemical should be classified as Non binder, MW>500 by Estrogen Receptor Binding

Domain logical expression index: "p"

Referential boundary: The target chemical should be classified as Non binder, impaired OH or NH2 group by Estrogen Receptor Binding

Domain logical expression index: "q"

Referential boundary: The target chemical should be classified as Class 5 (Not possible to classify according to these rules) by Acute aquatic toxicity classification by Verhaar (Modified) ONLY

Domain logical expression index: "r"

Referential boundary: The target chemical should be classified as Not classified by Aquatic toxicity classification by ECOSAR

Domain logical expression index: "s"

Referential boundary: The target chemical should be classified as Not Related to an Existing ECOSAR Class by Aquatic toxicity classification by ECOSAR

Domain logical expression index: "t"

Referential boundary: The target chemical should be classified as No alert found by Protein binding alerts for Chromosomal aberration by OASIS v.1.2

Domain logical expression index: "u"

Referential boundary: The target chemical should be classified as AN2 OR AN2 >> Michael addition to the quinoid type structures OR AN2 >> Michael addition to the quinoid type structures >> Substituted Phenols by Protein binding alerts for Chromosomal aberration by OASIS v.1.2

Domain logical expression index: "v"

Parametric boundary:The target chemical should have a value of log BCF max which is >= 1.01 log(L/kg wet)

Domain logical expression index: "w"

Parametric boundary:The target chemical should have a value of log BCF max which is <= 4.51 log(L/kg wet)

Interpretation of results:
other: not classified
Conclusions:
The LD50 value was estimated to be 8717.93 mg/kg bw,when male and female wistar rats were orally exposed with 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid (94022-69-2) via gavage.
Executive summary:

In a prediction done by SSS (2018) using the OECD QSAR toolbox with log kow as the primary descriptor, the acute oral toxicity was estimated for 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid (94022-69-2).The LD50 was estimated to be 8717.93 mg/kg bw,when male and female wistar rats were orally exposed with 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid (94022-69-2) via gavage.

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed
Dose descriptor:
LD50
8 717.93 mg/kg bw
Quality of whole database:
Data is Klimisch 2 and from QSAR toolbox 3.4

Acute toxicity: via inhalation route

Endpoint conclusion
Endpoint conclusion:
no study available

Acute toxicity: via dermal route

Endpoint conclusion
Endpoint conclusion:
no study available

Additional information

Acute Oral Toxicity: 

In different studies, 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid (94022-69-4) has been investigated for acute oral toxicity to a greater or lesser extent. Often the studies are based on in vivo experiments and estimated data in rodents, i.e. most commonly in rats for 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid (94022-69-4) along with the study available on the structurally similar read across substance 2,7 Naphthalendisulfonic acid (3861-73-2) and 1,5-Naphthalenedisulfonicacid, 2-(6-(4,6-dichlorostriazinyl) methylamino-1-hydroxy-3-sulfonaphthylazo)-) (73816-75-8). The predicted data using the OECD QSAR toolbox has also been compared with the experimental studies. The studies are summarized as below –

In a prediction done by SSS (2018) using the OECD QSAR toolbox with log kow as the primary descriptor, the acute oral toxicity was estimated for 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid (94022-69-2).The LD50 was estimated to be 8717.93 mg/kg bw,when male and female wistar rats were orally exposed with 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid (94022-69-2) via gavage.

The above study was further supported by U.S. National Library of Medicine (Chemidplus Database,U.S. National Library of Medicine,2017) and RTECS (RTECS (registry of toxic effect of chemical substance database), 2018) for the structurally similar read across substance 2,7 Naphthalendisulfonic acid (3861-73-2). Acute oral toxicity study was performed in rats using test material 2,7 Naphthalendisulfonic acid(3861-73-2).No mortality was observed at dose 5000 mg/kg bw.Clinical signs like changes in urine composition, behavioral excitement ,dermatitis and other signs after systemic exposure were observed. Hence,LD50 value was considered to be >5000 mg/kg bw,when rats were treated with 2,7 Naphthalendisulfonic acid(3861-73-2) orally.

This is further supported by U.S. National Library of Medicine (Chemidplus Database,U.S. National Library of Medicine,2017) and RTECS (RTECS (registry of toxic effect of chemical substance database), 2018) for the structurally similar read across substance 1,5-Naphthalenedisulfonicacid, 2-(6-(4,6-dichlorostriazinyl) methylamino-1-hydroxy-3-sulfonaphthylazo)-) (73816-75-8). In a acute oral toxicity study,rats were treated 1,5-Naphthalenedisulfonicacid, 2-(6-(4,6-dichlorostriazinyl) methylamino-1-hydroxy-3-sulfonaphthylazo)-)in the concentration of 8500 mg/kg bw. 50% mortality observed at dose 8500 mg/kg bw in treated rat. Therefore,LD50 was considered to be 8500 mg/kg bw,when rats were treated with 1,5-Naphthalenedisulfonicacid, 2-(6-(4,6-dichlorostriazinyl) methylamino-1-hydroxy-3-sulfonaphthylazo)-) (73816-75-8)orally.

Thus, based on the above studies on 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid (94022-69-2) and it’s structurally similar read across substance 2,7 Naphthalendisulfonic acid (3861-73-2) and 1,5-Naphthalenedisulfonicacid, 2-(6-(4,6-dichlorostriazinyl) methylamino-1-hydroxy-3-sulfonaphthylazo)-) (73816-75-8), it can be concluded that LD50 value is greater than 2000 mg/kg bw. Thus, comparing this value with the criteria of CLP regulation, 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid (94022-69-2) cannot be classified for acute oral toxicity.

Justification for classification or non-classification

Based on the above experimental studies and prediction on 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid (94022-69-2) and it’s structurally similar read across substance 2,7 Naphthalendisulfonic acid (3861-73-2) and 1,5-Naphthalenedisulfonicacid, 2-(6-(4,6-dichlorostriazinyl) methylamino-1-hydroxy-3-sulfonaphthylazo)-) (73816-75-8), it can be concluded that LD50 value is greater than 2000 mg/kg bw. Thus, comparing this value with the criteria of CLP regulation, 4,4'-[vinylenebis[(3-sulpho-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(1-sulpho-2-naphthyl)azo] naphthalene-2,7-disulphonic] acid (94022-69-2) cannot be classified for acute oral toxicity.