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EC number: 201-346-7 | CAS number: 81-39-0
Endpoint summary
Administrative data
Description of key information
Appearance/physical state/colour
The substance, 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione, is an organic solid compound appeared as red colored powder.
Melting point/freezing point
The test item starts decomposing at 227°C with colour change from red to black at 232.5 °C .
The mean decomposition range of 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione (CAS No. 81-39-0) was found be 227°C - 232.5 °C at 969.8 hPa.
Boiling point
According to Column II of Annex VII, the boiling point study does not need to be conducted for solids which either melt above 300 °C or decompose before boiling.
The substance 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione is a solid at room temperature and it is reported to decompose at a temperature of 227°C - 232.5 °C with colour change from red to black without melting.Hence, it is not feasible to determine boiling point and the endpoint was considered for waiver.
Density
The mean density of test item 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione (CAS No. 81-39-0) is determined as 0.3569 g/cm3 at 20 °C and 974.5 hPa.
Particle size distribution (Granulometry)
The particle size distribution of test item 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione (CAS No. 81-39-0) was determined by granulometric analysis with rotap sieve shaker. The particle size distribution was found to be in the range of 150 micron to 25 micron.
Vapour pressure
The estimated vapour pressure of the test substance 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione at 25 deg C was 4.82E-010 Pa.
Partition coefficient
The partition coefficient of test substance was estimated by using the EPI Suite KOWWIN Program (v1.68).
Based on the QSAR prediction done using the EPI Suite, the partition coefficient of test substance 3H-Naphtho(1,2,3-de)quinoline-2,7-dione, 3-methyl-6-((4-methylphenyl)amino)- was estimated to be 4.5056.
Water solubility
The water solubility for the test item 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione was determined to be 2.8809 mg/L at 30°C.
Surface tension
Based on the prediction done by ACD labs, the surface tension for chemical 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione was predicted to be 68.1 ± 5.0 dyne/cm.
Flash point
The flash point of 3-methyl-6-(p-toluidino)-3H-dibenz [f,ij]isoquinoline-2,7-dione (CAS No. 81-39-0) is determined to be greater than 235 °C at 971.0 hPa.
Auto flammability
3-methyl-6-[(4-methylphenyl)amino]-3H-naphtho[1,2,3-de]quinoline-2,7-dione did not catch fire on being exposed to air at room temperature of 27°C and atmospheric pressure of 966 hPa. This indicates that 3-methyl-6-[(4-methylphenyl)amino]-3H-naphtho[1,2,3-de]quinoline-2,7-dione is not auto-flammable.
Flammability
3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione does not indicate any ignition when the flame of bunsen burner having temperature of approximately 950°C is brought in contact with it. Thus it can be concluded that 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione was considered non-flammable for chemical safety assessment.
Explosiveness
The study does not need to be conducted because there are no chemical groups present in the molecule which are associated with explosive properties.
Oxidising properties
The study does not need to be conducted because there are no chemical groups present in the molecule which are associated with oxidizing properties and hence the classification procedure does not need to be applied.
pH
The pH of 1% w/v aqueous dispersion of the test item, 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione (CAS No. 81-39-0) was determined to be 6.96 at 32.6°C.
Viscosity
In accordance with Section 2 of REACH Annex XI, information requirement section 7.17, this study cannot be conducted on solid materials or gases. According to ECHA Chapter 7 guidance, viscosity measurement is only relevant to liquids. The
3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione is a red colored powder. Hence this study can be considered for waiver.
Additional information
Appearance/physical state/colour
Based on available data from obtained report, the substance, 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione, is an organic solid compound appeared as red colored powder.
Other supporting data from authoritative database, also supported the selected key study and observed the appearance of substance, 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione, as red colored powder organic compound.
Melting point/freezing point
The melting point determination of Test item 3-methyl-6-(p-toluidino)-3H-dibenz [f,ij]isoquinoline-2,7-dione (CAS No. 81-39-0) was done as per the test guideline OECD 102. The method followed was according toCapillary/metal block.The test item starts decomposing at 227°C with colour change from red to black at 232.5 °C. The decomposition range was found to be 227°C - 232.5 °C at 969.8 hPa.
Boiling point
According to Column II of Annex VII, the boiling point study does not need to be conducted for solids which either melt above 300 °C or decompose before boiling.
The substance 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione is a solid at room temperature and it is reported to decompose at a temperature of 227°C - 232.5 °C with colour change from red to black without melting.Hence, it is not feasible to determine boiling point and the endpoint was considered for waiver.
Density
The density of test item 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione (CAS No. 81-39-0) was determined following OECD guideline 109 and according to the method adapted from ASTM D 854-02. The mean density of the test item was determined to be 0.3569 g/cm3 at 20 °C and 974.5 hPa.
Particle size distribution (Granulometry)
The particle size distribution of test item 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione (CAS No. 81-39-0) was determined by granulometric analysis with rotap sieve shaker. The particle size distribution was found to be in the range of 150 micron to 25 micron.
Vapour pressure
Modified Grain method (Mean of Antoine and Modified Grain methods) was used to estimate the vapour pressure of the test substance 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione using MPBPVP v1.43 of EPI SUITE.
The estimated vapour pressure of the test substance 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione at 25 deg C was 4.82E-010 Pa.
Partition coefficient
The partition coefficient of test substance was estimated by using the EPI Suite KOWWIN Program (v1.68).
Based on the QSAR prediction done using the EPI Suite, the partition coefficient of test substance 3H-Naphtho(1,2,3-de)quinoline-2,7-dione, 3-methyl-6-((4-methylphenyl)amino)- was estimated to be 4.5056.
Water solubility
The water solubility determination of test item 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione (CAS No. 81-39-0) was done as per the OECD guideline 105 by spectrophotometric analytical method as per OECD 101. The solubility of (3-methyl-6-(p-toluidino) -3H-dibenz[f,ij]isoquinoline-2,7-dione (81-39-0) in water was determined to be 2.8809 mg/L at 30°C.
Hence the given substance was considered to be slightly soluble in water.
Surface tension
Based on the prediction done by ACD labs Software (v12.1.0.50375), the surface tension for chemical 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione was predicted to be 68.1 ± 5.0 dyne/cm.
Flash point
The flash point determination of3-methyl-6-(p-toluidino)-3H-dibenz [f,ij]isoquinoline-2,7-dione (CAS No. 81-39-0) was done following closed cup method using Pensky-Martens flash point apparatus. The test was conducted and flash point was determined to be greater than 235°C at 971.0 hPa.
Auto flammability
3-methyl-6-[(4-methylphenyl)amino]-3H-naphtho[1,2,3-de]quinoline-2,7-dione did not catch fire on being exposed to air at room temperature of 27°C and atmospheric pressure of 966 hPa. This indicates that 3-methyl-6-[(4-methylphenyl)amino]-3H-naphtho[1,2,3-de]quinoline-2,7-dione is not auto-flammable.
Flammability
3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione does not indicate any ignition when the flame of bunsen burner having temperature of approximately 950°C is brought in contact with it. Thus it can be concluded that 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione was considered non-flammable for chemical safety assessment.
Explosiveness
The study does not need to be conducted because there are no chemical groups present in the molecule which are associated with explosive properties.
Oxidising properties
The study does not need to be conducted because there are no chemical groups present in the molecule which are associated with oxidizing properties and hence the classification procedure does not need to be applied.
pH
The pH determination of test item, 3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione (CAS No. 81-39-0) was done following OECD guideline 122. pH of 1% w/v aqueous dispersion was measured with the help of pH meter and it was observed to be 6.96 at 32.6°C.
Viscosity
In accordance with Section 2 of REACH Annex XI, information requirement section 7.17, this study cannot be conducted on solid materials or gases. According to ECHA Chapter 7 guidance, viscosity measurement is only relevant to liquids. The
3-methyl-6-(p-toluidino)-3H-dibenz[f,ij]isoquinoline-2,7-dione is a red colored powder. Hence this study can be considered for waiver.
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