Registration Dossier
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EC number: 214-463-3 | CAS number: 1131-18-6
Endpoint summary
Administrative data
Description of key information
Appearance / physical state / colour
The appearance of Test item 3-methyl-1-phenylpyrazol-5-ylamine (CAS No.1131-18-6) is observed to be off white powder organic compound.
Melting point / freezing point
The Mean Melting Point(C) of 3-methyl-1-phenylpyrazol-5-ylamine (CAS No. 1131-18-6) was found be 114.5°C at 973.9 hPa.
Boiling point
The of 3-methyl-1-phenylpyrazol-5-ylamine (CAS No. 1131-18-6) wasgreater than 250°C at 974.3 hPa.
Density
The density of chemical 3-methyl-1-phenyl-1H-pyrazol-5-amine was estimated to be 1.17 ± 0.1 g/cm3 at 20°C and 760 mmHg pressure.
Particle size distrubution:
The particle size distribution of 3-methyl-1-phenyl-1H-pyrazol-5-amine was determined by granulometric analysis with rotap sieve shaker. The particle size distribution was determined to be in the range of 150 micron to 53 micron.
Vapour pressure
The vapour pressure of 3-methyl-1-phenylpyrazol-5-ylamine was estimated to be 0.00559 Pa at 25 deg C by means of Modified Grain Method.
Partition coefficient
The partition Coefficient n-octanol/water of test chmeical 3-methyl-1-phenyl-1H-pyrazol-5-amine was determined by the Reverse Phase High Performance Liquid Chromatographic method according to OECD Guideline No. 117 for testing of Chemicals. The reference substances were chosen according to estimated Pow range of the test substance and generalized calibration graph was prepared. The reference substances were having Pow value ranging from 0.3 to 6.5. The Log Pow value was determined to be 1.786 ± 0.005 dimensionless at 25°C. This value indicates that the substance is hydrophilic in nature.
Water solubility
The water solubility for the test item 3-methyl-1-phenylpyrazol-5-ylamine was found to be 6050.6 mg/L at 25°C.
Surface tension
Based on the data from ACD labs, surface tension of chemical 3-methyl-1-phenyl-1H-pyrazol-5-amine was predicted to be 45.6 ± 7.0 N/m
Flash point
The mean flash point of 3-methyl-1-phenylpyrazol-5-ylamine (CAS No. 1131-18-6) was 121.6°C at 972.8 hPa.
Auto flammability:
3-methyl-1-phenylpyrazol-5-ylamine (CAS No. 1131-18-6) did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that 3-methyl-1-phenylpyrazol-5-ylamine (CAS No. 1131-18-6) is not auto-flammable.
Flammability:
3-methyl-1-phenyl-1H-pyrazol-5-amine 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-1-phenyl-1H-pyrazol-5-amine is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 3-methyl-1-phenyl-1H-pyrazol-5-amine was considered non-flammable.
Explosiveness
The study does not need to be conducted because the substance contains chemical groups associated with explosive properties which include oxygen, but the calculated oxygen balance is less than - 200
Oxidising properties:
The study does not need to be conducted because there are no chemical groups present in the molecule which are associated with oxidising properties and hence, the classification procedure does not need to be applied
pH: The pH determination of test item 3-methyl-1-phenylpyrazol-5-ylamine (CAS No1131-18-6) was done as per the test guideline OECD 122. The mean pH of the test dispersion was determined with the help of digital pH meter. The mean pH was determine to be 6.22 at 26.8 °C.
Viscosity
This end point was considered for waiver since viscosity is an inherent property of a liquid that offers resistance to its flow and 3-methyl-1-phenylpyrazol-5- ylamine is a solid substance and hence this testing was considered scientifically unjustified for 3-methyl-1-phenylpyrazol-5-ylamine.
Additional information
Appearance / physical state / colour
Based on available data from experimental report, the appearance of Test item 3-methyl-1-phenylpyrazol-5-ylamine (CAS No.1131-18-6) is observed to be off white powder organic compound.
Melting point / freezing point
The melting point determination of 3-methyl-1-phenylpyrazol-5-ylamine (CAS No. 1131-18-6) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and Mean Melting Point(C) was found to be 114.5°C at 973.9 hPa.
Other supporting data from reliable sources such as authoritative database and handbooks, also supported the selected key study and exhibited the melting point of chemical 3-methyl-1-phenyl-1H-pyrazol-5-amine as 116 degree C, much closer to the selected key value.
Boiling point
The boiling point determination of 3-methyl-1-phenylpyrazol-5-ylamine (CAS No. 1131-18-6) was done following OECD Guideline 103 and according to the method of Siwoloboff. no string of bubbles were observed upto 250 deg C, inferring boiling point to be greater than 250 deg C at 974.3 hPa.
Other supporting data from reliable sources such as authoritative database and handbook, also supported the selected key study and exhibited the boiling point of chemical 3-methyl-1-phenyl-1H-pyrazol-5-amine as 333 degree C.
Density
Based on prediction done using ACD/I-Lab 2.0 and Scifinder, the density of chemical 3-methyl-1-phenyl-1H-pyrazol-5-amine was estimated to be 1.17 ± 0.1 g/cm3 at 20°C and 760 mmHg pressure.
Particle size distrubution:
The particle size distribution of 3-methyl-1-phenyl-1H-pyrazol-5-amine was determined by granulometric analysis with rotap sieve shaker. The particle size distribution was determined to be in the range of 150 micron to 53 micron.
Vapour pressure
The vapour pressure of 3-methyl-1-phenylpyrazol-5-ylamine was estimated to be 0.00559 Pa at 25 deg C by means of Modified Grain Method.
Partition coefficient
The partition Coefficient n-octanol/water of test chmeical 3-methyl-1-phenyl-1H-pyrazol-5-amine was determined by the Reverse Phase High Performance Liquid Chromatographic method according to OECD Guideline No. 117 for testing of Chemicals. The reference substances were chosen according to estimated Pow range of the test substance and generalized calibration graph was prepared. The reference substances were having Pow value ranging from 0.3 to 6.5. The Log Pow value was determined to be 1.786 ± 0.005 dimensionless at 25°C. This value indicates that the substance is hydrophilic in nature.
Based on available data from publication, the octanol-water partition coefficient (log Pow) of 3-methyl-1-phenylpyrazol-5-ylamine was determined to be 1.76.
Water solubility
The water solubility determination of test item 3-methyl-1-phenylpyrazol-5-ylamine (CAS No. 1131-18-6) was done as per the OECD guideline 105 by spectrophotometric analytical method as per OECD 101. The solubility of (3-methyl-1-phenylpyrazol-5-ylamine of CAS No: 1131-18-6) in water was found to be 6050.6 mg/L at 25°C.
Hence the given chemical is considered to be soluble in water.
Surface tension
Based on the data from ACD labs, surface tension of chemical 3-methyl-1-phenyl-1H-pyrazol-5-amine was predicted to be 45.6 ± 7.0 N/m
Flash point
The flash point determination of 3-methyl-1-phenylpyrazol-5-ylamine (CAS No. 1131-18-6) was done following closed cup method using Pensky-Martens flash point apparatus. The test was conducted in replicates and mean flash point was found to be 121.6°C at 972.8 hPa.
Auto flammability:
3-methyl-1-phenylpyrazol-5-ylamine (CAS No. 1131-18-6) did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that 3-methyl-1-phenylpyrazol-5-ylamine (CAS No. 1131-18-6) is not auto-flammable.
Flammability:
3-methyl-1-phenyl-1H-pyrazol-5-amine 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-1-phenyl-1H-pyrazol-5-amine is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 3-methyl-1-phenyl-1H-pyrazol-5-amine was considered non-flammable.
Explosiveness
The study does not need to be conducted because the substance contains chemical groups associated with explosive properties which include oxygen, but the calculated oxygen balance is less than - 200
Oxidising properties:
The study does not need to be conducted because there are no chemical groups present in the molecule which are associated with oxidising properties and hence, the classification procedure does not need to be applied
pH: The pH determination of test item 3-methyl-1-phenylpyrazol-5-ylamine (CAS No1131-18-6) was done as per the test guideline OECD 122. The mean pH of the test dispersion was determined with the help of digital pH meter. The mean pH was determine to be 6.22 at 26.8 °C.
Viscosity
This end point was considered for waiver since viscosity is an inherent property of a liquid that offers resistance to its flow and 3-methyl-1-phenylpyrazol-5- ylamine is a solid substance and hence this testing was considered scientifically unjustified for 3-methyl-1-phenylpyrazol-5-ylamine.
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