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Description of key information

Appearance /Physical state/ Colour

The appearance of 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid was observed to be Light grey, to, off-white solid powder.

Melting point / Freezing point

Based on available data from material safety data sheet the appearance of 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid was observed to be light grey, to, off-white solid powder.

Boiling point

Based on the prediction done using the EPI Suite MPVPBP V1.43, the Boiling point of chemical 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid was predicted. The boiling point of chemical was estimated to be 603.18 ˚C

Density

Based on prediction done using ACD/I-Lab 2.0, the density of chemical 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid was estimated to be 1.880 ± 0.06 g/cm3.

Particle size distribution (Granulometry)

The particle size distribution of 3-amino-5-hydroxynaphthalene-2,7-disulphonic 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 53 micron.

Vapour pressure

Modified Grain method (Mean of Antoine and Modified Grain methods) was used to estimate the vapour pressure of the substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid using MPBPVP v1.43 of EPI SUITE.

The estimated vapour pressure of the substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid at 25 deg C was 9.88E-015 Pa.

Partition coefficient

KOWWIN V1.68 was used to estimate the octanol water partition coefficient of the test substance 3-amino-5-hydroxynaphthalene -2,7-disulphonic acid.

The estimated logPOW of the test substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid was -2.3336. Based on the estimated value, the test substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid can be considered hydrophillic in nature, which is also supported by the high water solubility of the test substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid.

Water solubility

WSKOW v1.42 was used to estimate the water solubility of the test substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid .

The estimated water solubility of the test substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid at 25 deg C was 35360 mg/l.

Based on the estimated value, the test substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid is very soluble in water.

Surface tension

Based on the data from ACD labs, surface tension for chemical 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid was predicted to be 104.7 ± 3.0 dyne/cm

Flash point

Based on the Calculation done using  scientifically verified and validated formulas / equations, the flash point of chemical 3-amino-5-hydroxynaphthalene- 2,7-disulphonic acid was estimated to be 380.354 degree C.

Auto flammability

3-amino-5-hydroxynaphthalene-2,7-disulphonic acid did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid is not auto-flammable.

Flammability

3-amino-5-hydroxynaphthalene-2,7-disulphonic 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 3-amino-5-hydroxynaphthalene -2,7-disulphonic acid is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 3-amino-5-hydroxynaphthalene- 2,7- disulphonic 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.

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.

Additional information

Appearance /Physical state/ Colour

Based on available data from obtained report, the appearance of 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid was observed to be Light grey, to, Off-white solid powder.

Melting point / Freezing point

Based on available data from material safety data sheet the appearance of 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid was observed to be light grey, to, off-white solid powder.

Boiling point

Based on the prediction done using the EPI Suite MPVPBP V1.43, the Boiling point of chemical 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid was predicted. The boiling point of chemical was estimated to be 603.18 ˚C

Density

Based on prediction done using ACD/I-Lab 2.0, the density of chemical 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid was estimated to be 1.880 ± 0.06 g/cm3.

Particle size distribution (Granulometry)

The particle size distribution of 3-amino-5-hydroxynaphthalene-2,7-disulphonic 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 53 micron.

Vapour pressure

Modified Grain method (Mean of Antoine and Modified Grain methods) was used to estimate the vapour pressure of the substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid using MPBPVP v1.43 of EPI SUITE.

The estimated vapour pressure of the substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid at 25 deg C was 9.88E-015 Pa.

Partition coefficient

Octanol water partition coefficient of target chemical was predicted from different sources which are summarized below.

First prediction done using KOWWIN V1.68 of EPI Suite, 2017 and Danish QSAR, 2017, the octanol water partition coefficient of the substance 3-amino-5-hydroxynaphthalene -2,7-disulphonic acid was estimated as -2.3336.

Another prediction done by using ACD lab ( Advanced Chemistry Development 2017) and Chemspider 2017, the estimated octanol water partition coeffient of the 3-amino-5-hydroxynaphthalene -2, 7-disulphonic acid was - 2.31 which is very close to previous key study.

Based on these estimated value, the substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid can be considered as hydrophillic in nature, which is also supported by the high water solubility of the substance 3-amino-5-hydroxynaphthalene -2,7-disulphonic acid.

Water solubility

WSKOW v1.42 was used to estimate the water solubility of the test substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid .

The estimated water solubility of the test substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid at 25 deg C was 35360 mg/l.

Based on the estimated value, the test substance 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid is very soluble in water.

Surface tension

Based on the data from ACD labs, surface tension for chemical 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid was predicted to be 104.7 ± 3.0 dyne/cm

Flash point

Based on the Calculation done using  scientifically verified and validated formulas / equations, the flash point of chemical 3-amino-5-hydroxynaphthalene- 2,7-disulphonic acid was estimated to be 380.354 degree C.

Auto flammability

3-amino-5-hydroxynaphthalene-2,7-disulphonic acid did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that 3-amino-5-hydroxynaphthalene-2,7-disulphonic acid is not auto-flammable.

Flammability

3-amino-5-hydroxynaphthalene-2,7-disulphonic 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 3-amino-5-hydroxynaphthalene -2,7-disulphonic acid is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 3-amino-5-hydroxynaphthalene- 2,7- disulphonic 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.

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.