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EC number: 257-791-2 | CAS number: 52256-39-0
Endpoint summary
Administrative data
Description of key information
Appearance / physical state / colour:
The appearance of Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was observed to be a solid powder organic compound.
Melting point/ Freezing point:
Based on prediction done using MPBPVP v1.43, the melting point of chemical Hydrogen[2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo] -5 -methyl-2-phenyl -3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was estimated to be 350 ˚C.
Boiling point:
The boiling point of Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was determined to be 529.4 ˚C at 760 mmHg pressure.
Density:
The density of chemical Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)] [2-[(4,5-dihydro-3 -methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was determined to be 1.8 g/cm3.
Particle size distribution (Granulometry):
The particle size distribution of Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)] [2-[(4,5 -dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) 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 test substance Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol- 3 -onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) at 25 deg C was 2.26E-25 Pa (1.69E-27 mm Hg).
Partition coefficient:
The octanol water partition coefficent of target chemical Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) (CAS no. 52256 -39 -0) was determined to be 8.94 dimensionless . On the basis of log Pow value the test chemical Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was considered to be hydrophobic in nature which is also supported by the insolubilty of this chemical in water.
Water solubility:
The estimated water solubility of test substance Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl -3H-pyrazol-3-onato(2-)] [2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) at 25 deg C was 9.73E-07 mg/l.
Surface tension:
In accordance with column 2 of Annex VII of the REACH regulation, the study need only be conducted if surface activity is a desired property of the chemical. The Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)] [2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) (52256-39-0) is used frequently as a dye. For this use, surface activity is not an important property. Hence this study was considered for waiver.
Flash point:
The flash point of Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was determined to be 274°C.
Autoflammability:
Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato (2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) is not auto-flammable.
Flammability:
Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) 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 Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo] -5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1 -phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) 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 Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was observed to be a solid powder organic compound.
Melting point/ Freezing point:
Based on the prediction done using the EPI Suite MPVPBP V1.43, the melting point of chemical Hydrogen [2,4-dihydro-4-[(2-hydroxy-5 -nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was predicted.
The melting point of chemical Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5 -dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was estimated to be 350 ˚C.
Boiling point:
Based on available data from obtained report, the boiling point of Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was determined to be 529.4 ˚C at 760 mmHg pressure.
Density:
Based on available data from obtained report, the density of chemical Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo] -5-methyl-2 -phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was determined to be 1.8 g/cm3.
Particle size distribution (Granulometry):
The particle size distribution of Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)] [2-[(4,5 -dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) 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 test substance Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) using MPBPVP v1.43 of EPI SUITE.
The estimated vapour pressure of the test substance Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H -pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) at 25 deg C was 2.26E-25 Pa (1.69E-27 mm Hg).
Partition coefficient:
The octanol water partition coefficent of target chemical Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) (CAS no. 52256 -39 -0) was determined to be 8.94 dimensionless . On the basis of log Pow value the test chemical Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was considered to be hydrophobic in nature which is also supported by the insolubilty of this chemical in water.
Water solubility:
WSKOW v1.42 was used to estimate the water solubility of the test substance Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo] -5 -methyl-2-phenyl -3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-).
The estimated water solubility of the test substance Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl -3H-pyrazol -3 -onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) at 25 deg C was 9.73E-07 mg/l.
Based on the estimated value, the test substance Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl -3H-pyrazol- 3 -onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was considered to be insoluble in water.
Surface tension:
In accordance with column 2 of Annex VII of the REACH regulation, the study need only be conducted if surface activity is a desired property of the chemical. The Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)] [2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) (52256-39-0) is used frequently as a dye. For this use, surface activity is not an important property. Hence this study was considered for waiver.
Flash point:
Based on available data from obtained report, the flash point of Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo] -5-methyl-2-phenyl-3H pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) was determined to be 274°C.
Autoflammability:
Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato (2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) is not auto-flammable.
Flammability:
Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) 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 Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus Hydrogen [2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo] -5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2-[(4,5-dihydro-3-methyl -5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzoato(2-)]chromate(1-) 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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