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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Appearance / physical state / colour:

The appearance of p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]  

benzenesulphonic acid  was observed to be a solid organic compound.

Melting point/ Freezing point:

Based on prediction done using MPBPVP v1.43, the melting point of chemical p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl] phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulphonic acid was  estimated to be 349.84 ˚C

Boiling point:

Based on prediction done using MPBPVP v1.43, the Boiling point of chemical p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl] phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid was  estimated to be 863.37 ˚C

Density:

The density of chemical p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1 -yl]  benzenesulphonic acid was estimated to be 1.65 ± 0.1 g/cm3 at 20 °C.

Particle size distribution (Granulometry):

The particle size distribution of p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo -1H-pyrazol-1-yl] benzenesulphonic acid  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 p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl] phenyl]azo] -3 -methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid at 25 deg C was 1.15E-024 Pa.

Partition coefficient:

Octanol water partition coefficient of target chemical 4-{4-[(E)-2-{2-methoxy-5-methyl-4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl}benzene-1-sulfonic acid (CAS no. 60958 -41 -0) was estimated. The estimated log POW of the chemical 4-{4-[(E)-2-{2-methoxy-5-methyl-4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl}benzene-1-sulfonic acid was -2.73 . On the basis of estimated value, the this test chemical can be considered as hydrophillic in nature.

Water solubility:

The estimated water solubility of test substance p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo] -3-methyl-5 -oxo-1H -pyrazol-1-yl] benzenesulphonic acid  at 25 deg C was 1e+006 mg/l.

Surface tension:

Based on the prediction done by ACD labs, the surface tension for chemical p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid was predicted to be 70.1 ± 7.0 dyne/cm.

Flash point:

Based on the Calculation done using  scientifically verified and validated formulas / equations, the flash point of chemical p-[4,5-dihydro-4 -[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid  was estimated to be 617.372 degree C.

Autoflammability:

p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that p-[4,5-dihydro-4-[[2 -methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid is not auto-flammable.

Flammability:

p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic 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 p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H -pyrazol-1-yl] benzenesulphonic acid is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo] -3 -methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic 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 p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl] sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid  was observed to be a solid organic compound.

Melting point/ Freezing point:

Based on the prediction done using the EPI Suite MPVPBP V1.43, the melting point of chemical

p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulphonic acid

was predicted.

The melting point of chemical p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo] -3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulphonic acid was estimated to be 349.84 ˚C.

Boiling point:

Based on the prediction done using the EPI Suite MPVPBP V1.43, the Boiling point of chemical

p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid was predicted.

The boiling point of chemical p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo] -3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid was estimated to be 863.37 ˚C.

Density:

Based on prediction done using ACD/I-Lab 2.0 and Scifinder, the density of chemical p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2 -(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid was estimated to be 1.65 ± 0.1 g/cm3 at 20 °C.

Particle size distribution (Granulometry):

The particle size distribution of p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo -1H-pyrazol-1-yl] benzenesulphonic acid  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 p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl] phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid using MPBPVP v1.43 of EPI SUITE.

The estimated vapour pressure of the test substance p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl] phenyl]azo] -3 -methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid at 25 deg C was 1.15E-024 Pa.

Partition coefficient:

Octanol water partition coefficient of target chemical 4-{4-[(E)-2-{2-methoxy-5-methyl-4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl}benzene-1-sulfonic acid (CAS no. 60958 -41 -0) was estimated. The estimated log POW of the chemical 4-{4-[(E)-2-{2-methoxy-5-methyl-4-[2-(sulfooxy)ethanesulfonyl]phenyl}diazen-1-yl]-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl}benzene-1-sulfonic acid was -2.73 . On the basis of estimated value, the this test chemical can be considered as hydrophillic in nature.

Water solubility:

WATERNT Program (v1.01) was used to estimate the water solubility of the test substance p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4- [[2 -(sulphooxy) ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid.

The estimated water solubility of the test substance p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl] azo]-3 -methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid at 25 deg C was 1e+006 mg/l.

Based on the estimated value, the test substance p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl] phenyl]azo] -3 -methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid 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

p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid

was predicted to be 70.1 ± 7.0 dyne/cm.

Flash point:

Based on the calculation done using  scientifically verified and validated formulas / equations, the flash point of chemical

p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid

was estimated to be 617.372 degree C.

Thus, according to flash point value the chemical p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo] -3 -methyl -5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid was not classified as flammable.

Autoflammability:

p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that p-[4,5-dihydro-4-[[2 -methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic acid is not auto-flammable.

Flammability:

p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic 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 p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-5-oxo-1H -pyrazol-1-yl] benzenesulphonic acid is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus p-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo] -3 -methyl-5-oxo-1H-pyrazol-1-yl] benzenesulphonic 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.