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EC number: 243-754-8 | CAS number: 20349-39-7
Endpoint summary
Administrative data
Description of key information
Appearance / physical state / colour:
The appearance of Disodium 4-hydroxynaphthalene-2,7-disulphonate was observed to be white-greyish red odorless solid crystalline powder (organic) compound.
Melting point/ Freezing point:
Based on prediction done using MPBPVP v1.43, the melting point of chemical Disodium 4-hydroxynaphthalene-2,7-disulphonate was estimated to be 316.50 ˚C.
Boiling point:
Based on prediction done using MPBPVP v1.43, the Boiling point of chemical Disodium 4-hydroxynaphthalene-2,7-disulphonate was estimated to be 722.44 ˚C
Density:
The density of chemical Disodium 4-hydroxynaphthalene-2,7-disulphonate was estimated to be 1.816 ± 0.06 g/cm3.
Particle size distribution (Granulometry):
The particle size distribution of Disodium 4-hydroxynaphthalene-2,7-disulphonate was determined by granulometric analysis with rotap sieve shaker. The particle size distribution was determined to be in the range of 147 micron to 52 micron.
Vapour pressure:
The estimated vapour pressure of the substance Disodium 4-hydroxynaphthalene-2,7-disulphonate at 25 deg C was 1.22E-016 Pa.
Partition coefficient:
Octanol water partition coefficient of target chemical 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) (CAS no. 20349-39-7) was estimated. The estimated log POW of the 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) was -3.99 . On the basis of estimated value, the 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) can be considered as hydrophillic in nature.
Water solubility:
The estimated water solubility of substance Disodium 4-hydroxynaphthalene-2,7-disulphonate at 25 deg C was 1000000 mg/l
Surface tension:
Based on the prediction done by ACD labs, the surface tension for chemical Disodium 4-hydroxynaphthalene-2,7-disulphonate was predicted to be 89.5 ± 3.0 dyne/cm.
Flash point:
Based on the Calculation done using scientifically verified and validated formulas / equations, the flash point of chemical Disodium 4 -hydroxynaphthalene-2,7-disulphonate was estimated to be 485.296 degree C.
Autoflammability:
Disodium 4-hydroxynaphthalene-2,7-disulphonate did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that Disodium 4-hydroxynaphthalene-2,7-disulphonate is not auto-flammable.
Flammability:
Disodium 4-hydroxynaphthalene-2,7-disulphonate 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 Disodium 4-hydroxynaphthalene-2,7-disulphonate is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus Disodium 4-hydroxynaphthalene-2,7-disulphonate 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 reports, the appearance of Disodium 4-hydroxynaphthalene-2,7-disulphonate was observed to be white-greyish red odorless solid crystalline powder (organic) compound.
Melting point/ Freezing point:
Based on the prediction done using the EPI Suite MPVPBP V1.43, the melting point of chemical Disodium 4-hydroxynaphthalene-2,7 -disulphonate was predicted.
The melting point of chemical Disodium 4-hydroxynaphthalene-2,7-disulphonate was estimated to be 316.50 ˚C.
Boiling point:
Based on the prediction done using the EPI Suite MPVPBP V1.43, the Boiling point of chemical Disodium 4-hydroxynaphthalene-2,7-disulphonate was predicted.
The boiling point of chemical Disodium 4-hydroxynaphthalene-2,7-disulphonate was estimated to be 722.44 ˚C.
Density:
Based on prediction done using ACD/I-Lab 2.0 and Scifinder, the density of chemical Disodium 4-hydroxynaphthalene-2,7-disulphonate was estimated to be 1.816 ± 0.06 g/cm3.
Particle size distribution (Granulometry):
The particle size distribution of Disodium 4-hydroxynaphthalene-2,7-disulphonate was determined by granulometric analysis with rotap sieve shaker. The particle size distribution was determined to be in the range of 147 micron to 52 micron.
Vapour pressure:
Modified Grain method (Mean of Antoine and Modified Grain methods) was used to estimate the vapour pressure of the substance Disodium 4-hydroxynaphthalene-2,7-disulphonate using MPBPVP v1.43 of EPI SUITE.
The estimated vapour pressure of the substance Disodium 4-hydroxynaphthalene-2,7-disulphonate at 25 deg C was 1.22E-016 Pa.
Partition coefficient:
Octanol water partition coefficient of target chemical 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) (CAS no. 20349-39-7) was estimated. The estimated log POW of the 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) was -3.99 . On the basis of estimated value, the 2,7-Naphthalenedisulfonic acid, 4-hydroxy-, sodium salt (1:2) can be considered as hydrophillic in nature.
Water solubility:
WSKOW v1.42 was used to estimate the water solubility of the substance Disodium 4-hydroxynaphthalene-2,7-disulphonate.
The estimated water solubility of the substance Disodium 4-hydroxynaphthalene-2,7-disulphonate at 25 deg C was 1000000 mg/l.
Based on the estimated value, the substance Disodium 4-hydroxynaphthalene-2,7-disulphonate was considered to be very soluble in water.
Surface tension:
Based on the prediction done by ACD labs Software (v12.1.0.50375), the surface tension for chemical Disodium 4-hydroxynaphthalene-2,7-disulphonate was predicted to be 89.5 ± 3.0 dyne/cm.
Flash point:
Based on the calculation done using scientifically verified and validated formulas / equations, the flash point of chemical Disodium 4 -hydroxynaphthalene-2,7-disulphonate was estimated to be 485.296 degree C. Thus, according to flash point value the chemical Disodium 4 -hydroxynaphthalene-2,7-disulphonate was not classified as flammable.
Autoflammability:
Disodium 4-hydroxynaphthalene-2,7-disulphonate did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that Disodium 4-hydroxynaphthalene-2,7-disulphonate is not auto-flammable.
Flammability:
Disodium 4-hydroxynaphthalene-2,7-disulphonate 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 Disodium 4-hydroxynaphthalene-2,7-disulphonate is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus Disodium 4-hydroxynaphthalene-2,7-disulphonate 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.
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