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EC number: 211-189-6 | CAS number: 632-99-5
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Justification for type of information:
- Data is from J-Check authoritative databases.
- Qualifier:
- according to guideline
- Guideline:
- other: As mention below
- Principles of method if other than guideline:
- Biodegradation study was conducted for evaluating the percentage biodegradability of test substance (4-(4-aminophenyl) (4-imino -cyclohexa-2,5-dienylidene) methyl)-2-methyl -aniline hydrochloride.
- GLP compliance:
- not specified
- Specific details on test material used for the study:
- - Name of test material: 4-[(4-aminophenyl)(4-iminocyclohexa-2,5-dien-1-ilydene) methyl]-2-methyl - benzenamine hydrochloride
- IUPAC name:(4-(4-aminophenyl)(4-imino -cyclohexa-2,5-dienylidene) methyl)-2-methylaniline hydrochloride
- Molecular formula: C20H19N3.ClH
- Molecular weight: 337.852 g/mole
- Smiles notation: C(\c1cc(c(N)cc1)C) (c1ccc(N)cc1) =C1/C =CC(=N)C=C1.Cl
- InChl: 1S/C20H19N3.ClH/c1-13-12-16 (6-11-19(13)23)20(14-2-7-17(21)8-3-14)15-4-9-18(22)10-5-15;/h2-12, 21H, 22-23H2,1H3;1H/b20-14-,21-17?;
- Substance type: Organic
- Physical state: Solid - Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Details on inoculum:
- - Concentration of sludge: 30mg/L
- Duration of test (contact time):
- 28 d
- Initial conc.:
- 100 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- other: BOD, TOC and HPLC
- Details on study design:
- Standard type
- Key result
- Parameter:
- other: BOD
- Value:
- 0
- Sampling time:
- 28 d
- Remarks on result:
- other: Other details not known
- Key result
- Parameter:
- other: TOC
- Value:
- 13
- Sampling time:
- 28 d
- Remarks on result:
- other: Other details not known
- Key result
- Parameter:
- other: HPLC
- Value:
- 2
- Sampling time:
- 28 d
- Remarks on result:
- other: Other details not known
- Details on results:
- A negative value of the biodegradation is shown in parentheses.
- Results with reference substance:
- No data available
- Validity criteria fulfilled:
- not specified
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- The percentage degradation of test substance was determined to 0, 13 and 2% by BOD, TOC, and HPLC parameter in 28 days. Thus, based on percentage degradation, (4-(4-aminophenyl) (4-imino -cyclohexa-2,5-dienylidene) methyl)-2-methylaniline hydrochloride is considered to be not readily biodegradable in water.
- Executive summary:
Biodegradation study was conducted for 28 days for evaluating the percentage biodegradability of test substance (4-(4-aminophenyl)(4-imino -cyclohexa-2,5-dienylidene) methyl)-2-methylaniline hydrochloride. (CAS no. 632-99-5). Concentration of inoculum i.e, sludge used was 30 mg/l and initial test substance conc. used in the study was 100 mg/l, respectively. The percentage degradation of test substance was determined to 0, 13 and 2% by BOD, TOC, and HPLC parameter in 28 days. Thus, based on percentage degradation, (4-(4-aminophenyl)(4-imino -cyclohexa-2,5-dienylidene) methyl)-2-methylaniline hydrochloride is considered to be not readily biodegradable in water.
Reference
Description of key information
Biodegradation study was conducted for 28 days for evaluating the percentage biodegradability of test substance (4-(4-aminophenyl)(4-imino -cyclohexa-2,5-dienylidene) methyl)-2-methylaniline hydrochloride. (CAS no. 632-99-5). Concentration of inoculum i.e, sludge used was 30 mg/l and initial test substance conc. used in the study was 100 mg/l, respectively. The percentage degradation of test substance was determined to 0, 13 and 2% by BOD, TOC, and HPLC parameter in 28 days. Thus, based on percentage degradation, (4-(4-aminophenyl)(4-imino -cyclohexa-2,5-dienylidene) methyl)-2-methylaniline hydrochloride is considered to be not readily biodegradable in water.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
Various predicted data for the target compound (4-(4-aminophenyl)(4-imino -cyclohexa-2,5-dienylidene) methyl)-2-methylaniline hydrochloride (CAS No. 632-99-5) and supporting weight of evidence studies for its closest read across substance with logKow as the primary descriptor were reviewed for the biodegradation end point which are summarized as below:
In first experimental study from J-check databases 2017 for the target chemical (4-(4-aminophenyl)(4-imino -cyclohexa-2,5-dienylidene) methyl)-2-methylaniline hydrochloride, biodegradation experiment was conducted for evaluating the percentage biodegradability. Biodegradation study was conducted for 28 days for evaluating the percentage biodegradability of test substance (4-(4-aminophenyl)(4-imino -cyclohexa-2,5-dienylidene) methyl)-2-methylaniline hydrochloride. (CAS no. 632-99-5). Concentration of inoculum i.e, sludge used was 30 mg/l and initial test substance conc. used in the study was 100 mg/l, respectively. The percentage degradation of test substance was determined to 0, 13 and 2% by BOD, TOC, and HPLC parameter in 28 days. Thus, based on percentage degradation, (4-(4-aminophenyl)(4-imino -cyclohexa-2,5-dienylidene) methyl)-2-methylaniline hydrochloride is considered to be not readily biodegradable in water.
In second prediction using the Estimation Programs Interface Suite (EPI suite, 2017) the biodegradation potential of the test compound (4-(4-aminophenyl) (4-iminocyclohexa-2, 5-dienylidene)methyl) -2-methylaniline hydrochloride (632 -99 -5) in the presence of mixed populations of environmental microorganisms. The biodegradability of the substance was calculated using seven different models such as Linear Model, Non-Linear Model, Ultimate Biodegradation Timeframe, Primary Biodegradation Timeframe, MITI Linear Model, MITI Non-Linear Model and Anaerobic Model (called as Biowin 1-7, respectively) of the BIOWIN v4.10 software. The results indicate that chemical (4-(4-aminophenyl)(4-iminocyclohexa-2,5-dienylidene)methyl)-2-methylaniline hydrochloride is expected to be not readily biodegradable.
In a supporting weight of evidence study from peer reviewed journal (Toshihide Saito et. al, 1984) for the read across chemical 4,4'-carbonimidoylb is (N,N-dimethylaniline) hydrochloride (CAS no. 2465-27-2),biodegradation experiment was conducted for evaluating the percentage biodegradability of read across substance 4,4'-carbonimidoylbis (N,N-dimethylaniline) hydrochloride. Activated sludge was used as a test inoculum obtained from municipal sewage. Test substance of conc. 500 mg/l was prepared and diluted as needed. The COD measurement was performed by the potassium dichromate reflux method based on Japanese Industrial Standards. In the BOD measurement, a sample solution was taken into a container. Then JIS-BOD testing solutions, i.e. 3 ml of A solution and 1 ml of B, C, D solutions were added to the sample solution, respectively. Then 5 ml of the supernatant of the municipal sewage activated sludge was added to the sample solution and diluted to 300 ml with water. Immediately, the BOD-time curve was recorded at 20~ using an Ohkura OM-200I type coulometer. The TOC measurement was carried out by a Yanagimoto TOC-ILW.BOD5, COD, ThOD and TOC value of the read across chemical was determined to be 0.038, 1.42, 2.50 and 0.32 g/g, respectively. The BOD5/TOC ratio of read across chemical was determined to be 0.12 (i.e. ranges in between 0.08-0.89), indicating that the chemical is highly resistant to aerobic biodegradation. Thus, based on this value BOD5/TOC value, it can be concluded that the chemical 4,4'-carbonimidoylbis(N,N-dimethylaniline) hydrochloride is not readily biodegradable in nature.
For the same read across chemical 4,4'-carbonimidoylbis(N,N-dimethylaniline) hydrochloride (CAS no. 2465-27-2), biodegradation study was conducted for 14 days for evaluating the percentage biodegradability of read across substance 4,4'-carbonimidoylbis(N,N-dimethylaniline) hydrochloride. (CAS no. 2465-27-2) (J-CHECK, 2017 and EnviChem, 2014). Concentration of inoculum i.e, sludge used was 30 mg/l and initial test substance conc. used in the study was 100 mg/l, respectively. The percentage degradation of read across substance 4,4'-carbonimidoylbis(N,N-dimethylaniline) hydrochloride was determined to 0 and 12% by BOD and UV-Vis parameter in 14 days. Thus, based on percentage degradation, 4,4'-carbonimidoylbis(N,N-dimethylaniline) hydrochloride is considered to be not readily biodegradable in nature.
Similarly another biodegradation study (from authoritative database J-CHECK, 2017) was conducted for 28 days for evaluating the percentage biodegradability of read across substance 4-[4-(dimethylamino) benzene carboximidoyl]-N,N-dimethylaniline hydrochloride (1100-88-5). The test chemical was subjected to biodegradation test by taking sludge as inoculums at 30 mg/L concentration. Biodegradation was analyzed by using O2 consumption (BOD), TOC removal and test material analysis by HPLC. The initial concentration of test chemical was 100 mg/L and by taking standard test equipment. After 4 weeks (28 days) test chemical benzyl(triphenyl) phosphanium chloride showed 0% biodegradation by all three parameters namely O2 consumption (BOD) parameter, TOC removal and test material analysis by HPLC parameter in 28 days. So it is concluded that this test Chemical is not readily biodegradable.
On the basis of above results for target chemical (4-(4-aminophenyl)(4-imino -cyclohexa-2,5-dienylidene) methyl)-2-methylaniline hydrochloride (CAS No. 632-99-5) from J- check, EPI suite, 2017 and for its read across substance (from peer reviewed journal, authoritative database J-CHECK, EnviChem, it can be concluded that the test substance (4-(4-aminophenyl)(4-imino -cyclohexa-2,5-dienylidene) methyl)-2-methylaniline hydrochloride can be expected to be not readily biodegradable in nature.
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