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EC number: 228-406-5 | CAS number: 6259-53-6
Endpoint summary
Administrative data
Description of key information
Appearance:
On the basis of physical observation and using the sense of smell, 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was observed to be a light brown powder.
Melting point:
Based on prediction done using MPBPVP v1.43, the melting point of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was estimated to be 193.78 Deg C.
Boiling Point:
Based on prediction done using MPBPVP v1.43,the Boiling point of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was estimated to be 459.71 Deg C.
Density:
Based on prediction done using ACD/I-Lab 2.0, the density of chemical 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was estimated to be 1.542 g/cm3 at temperature 20 Deg C.
Particle size distribution:
The particle size distribution of 4-hydroxy-6 -(methylamino)naphthalene-2 -sulfonic acid was determined by granulometric analysis with rotap sieve shaker. The particle size distribution was determined to be in the range of 150 micron to 25 micron.
Vapour pressure:
The estimated vapour pressure of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid at 25 deg C was 6.99E-09 Pa.
Partition coefficient
Based on the available data from modeling databases using the KOWWIN V1.68 programme, octanol water partition coefficient (log Pow) value of the test substance 4 -hydroxy-6 -(methyl amino)naphthalene-2 -sulfonic acid was estimated to be -0.84. Thus, on the basis of logPow value, chemical 4 -hydroxy-6 -(methylamino)naphthalene-2 -sulfonic acid can be considered to be hydrophilic in nature.
Water solubility:
The estimated water solubility of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid at 25 deg C was 4489 mg/l.
Surface tension:
Based on the data from ACD labs, surface tension for 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was predicted to be 0.0773 N/m.
Flash point:
Flash point of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid is calculated at 1 atm. Pressure to be 262.91 Deg C.
Auto flammability:
4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid is not auto-flammable.
Flammability:
4-hydroxy-6 -(methylamino)naphthalene-2 -sulfonic acid 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 4 -hydroxy-6 -(methylamino)naphthalene-2 -sulfonic acid is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 4 -hydroxy-6 -(methylamino)naphthalene-2 -sulfonic acid 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.
Oxidizing properties:
The study does not need to be conducted because the substance is a solid.
Additional information
Appearance:
On the basis of physical observation and using the sense of smell, 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was observed to be a light brown powder.
Melting point:
Based on the prediction done using the EPI Suite MPVPBP V1.43,the melting point of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was predicted.
The melting point of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was estimated to be 193.78 ˚C.
Boiling Point:
Based on the prediction done using the EPI Suite MPVPBP V1.43,the Boiling point of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was predicted.
The boiling point of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was estimated to be 459.71 ˚C.
Density:
Based on prediction done using ACD/I-Lab 2.0, the density of chemical 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was estimated to be 1.542 g/cm3 at temperature 20 Deg C.
Particle size distribution:
The particle size distribution of 4-hydroxy-6 -(methylamino)naphthalene-2 -sulfonic acid was determined by granulometric analysis with rotap sieve shaker. The particle size distribution was determined to be in the range of 150 micron to 25 micron.
Vapour pressure:
Modified Grain method was used to estimate the vapour pressure of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid using MPBPVP v1.43 of EPI SUITE.
The estimated vapour pressure of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid at 25 deg C was 6.99E-09 Pa.
Partition coefficient
Based on the available data in a key study from modeling databases using the KOWWIN V1.68 programme, octanol water partition coefficient (log Pow) value of the test substance 4 -hydroxy-6 -(methylamino)naphthalene-2 -sulfonic acid was estimated to be -0.84.
In a supportingstudy from modelling database,the partition coefficient (log Pow) value of the substance 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was estimated to be -0.8 ± 1.07.
In an another supportingstudy from predicted database,the partition coefficient (log Pow) value of the substance 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was estimated to be -0.645 ± 1.039 at 25°C.
Additional studyfrom predicted database indicates that the octanol waterpartition coefficient (log Pow) value of the substance 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was estimated to be -0.454.
Thus, based on the available information, the logPow valueof the test substance 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid ranges from -0.454 to -0.84, respectively. On the basis of this value, chemical 4-hydroxy-6 -(methylamino)naphthalene-2-sulfonic acid be considered to be hydrophilic in nature.
Water solubility:
WSKOW v1.42 was used to estimate the water solubility of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid.
The estimated water solubility of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid at 25 deg C was 4489 mg/l.
Based on the estimated value, 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was soluble in water.
Surface tension:
Based on the data from ACD labs, surface tension for 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid was predicted to be 0.0773 N/m.
Flash point:
Flash point of 4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid is calculated at 1 atm. Pressure to be 262.91 Deg C.
Auto flammability:
4-hydroxy-6-(methylamino)naphthalene-2-sulfonic acid did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that 4-hydroxy-6 -(methylamino)naphthalene-2-sulfonic acid is not auto-flammable.
Flammability:
4-hydroxy-6 -(methylamino)naphthalene-2 -sulfonic acid 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 4 -hydroxy-6 -(methylamino)naphthalene-2 -sulfonic acid is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 4 -hydroxy-6 -(methylamino)naphthalene-2 -sulfonic acid 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.
Oxidizing properties:
The study does not need to be conducted because the substance is a solid.
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