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Physical & Chemical properties

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Description of key information

Appearance:

Based on available data from reliable sources such as authoritative database and safety data sheet the chemical 1-[(2-methoxyphenyl)diazenyl]-2-naphthol was observed to be an organic reddish brown coloured powder in appearance.

Melting point:.

Based on available data from reliable sources such as authoritative database ,review article and handbooks the melting point of  chemical 1-[(2-methoxyphenyl)diazenyl]-2-naphthol was determined to be 183 degree C.

Boiling point:

Based on the prediction done using the EPI Suite MPVPBP V1.43,the Boiling point of chemical1-[(2-methoxyphenyl)diazenyl]-2-naphtholwas predicted.

The boiling point of chemical1-[(2-methoxyphenyl)diazenyl]-2-naphtholwas estimated to be 430.05 ˚C

Density:

Based on prediction done using ACD/I-Lab 2.0,the density of chemical 1-[(2-methoxyphenyl)diazenyl]-2-naphthol was estimated to be 1.19 ± 0.1 g/cm3.

Particle Size Distribution:

The particle size distribution of test item 1-[(2-methoxyphenyl)diazenyl]-2-naphthol 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.

Vapor Pressure:

Data from various authoritative databases suggests that the estimated vapor pressure of Solvent Red 1 at 25 deg C was 6.3X10-9mmHg = 8.39E-07 Pa.

Partitin Coefficient:

Capacity factors were determined for 20 disperse and solvent dyes by a high performance liquid chromatographic method using methanol/water and a C-18 reverse-phase column. Regression equations are given that establish relationships among capacity factors, water solubilities and octanol/water partition coefficients. The method used was similar to OECD GUIDELINES 117.

The liquid chromatographic system comprised a PerkinElmer Series 2000 pump, a Varian Vari-Chrom absorbance detector and an Alltech Econosil C-18 (10.urn)column (4,6 mm x 25 cm with guard column). The mobile phase, HPLC-grade methanol and deionized water (75/25 vol. %), was filtered for use at a flow rate of 1,3 ml/min, Detection was at the wavelength of maximum absorbance in the visible spectra.

The experimental octanol water partition coefficient (log Pow) of Solvent Red 1 was determined to be 7.5

Data from various authoritative databases and peer reviewed articles also indicate that the experimental octanol water partition coefficient (log Pow) of Solvent Red 1 was 7.5

Water Solubility:

The experimental water solubility of Solvent Red 1 at 25°C was determined 3.3x10-4mg/l.

Data from various authoritative databases also suggests that the experimental water solubility of the test chemical at 25°C is 3.3x10-4mg/l.

Thus, Solvent Red 1 can be considered to be insoluble in water.

Surface tension:

Based on the data from ACD labs, surface tension for test item 1-[(2-methoxyphenyl)azo]-2-naphthol was predicted to be 44.8 ± 7.0 dyne/cm.

Flash point:

The flash point of 1-[(2-methoxyphenyl)azo]-2-naphthol (1229 -55 -6) was calculated to be 239.14 degree C. Based on criteria mentioned in CLP regulation the substance 1-[(2-methoxyphenyl)azo]-2-naphthol(1229 -55 -6) was considered to be non flammable.

Autoflammability:

1-[(2-methoxyphenyl)azo]-2-naphthol did not catch fire on being exposed to air at room temperature of 27°Cpressure of 966 hPa. This indicates that 1-[(2-methoxyphenyl)azo]-2-naphthol is not auto-flammable.

Flammability:

1-[(2-methoxyphenyl)azo]-2-naphthol 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 1-[(2-methoxyphenyl)azo]-2-naphthol is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 1-[(2-methoxyphenyl)azo]-2-naphthol 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 the organic substance contains oxygen or halogen atoms which are chemically bonded only to carbon or hydrogen and hence, the classification procedure does not need to be applied

Viscosity:

The study does not need to be conducted because the substance is a solid

Additional information

Appearance:

Based on available data from reliable sources such as authoritative database and safety data sheet the chemical 1-[(2-methoxyphenyl)diazenyl]-2-naphthol was observed to be an organic reddish brown coloured powder in appearance.

Melting point:.

Based on available data from reliable sources such as authoritative database ,review article and handbooks the melting point of  chemical 1-[(2-methoxyphenyl)diazenyl]-2-naphthol was determined to be 183 degree C.

Other supporting study from authoritative database also indicates that the melting point of  chemical 1-[(2-methoxyphenyl)diazenyl]-2-naphthol was determined to be in the range of 180 degree C to 183 degree C.also supported by the prediction done using MPBPVP v1.43,the melting point of chemical1-[(2-methoxyphenyl)diazenyl]-2-naphtholwas estimated to be 160.5 degree C.

Boiling point:

Based on the prediction done using the EPI Suite MPVPBP V1.43,the Boiling point of chemical1-[(2-methoxyphenyl)diazenyl]-2-naphtholwas predicted.

The boiling point of chemical1-[(2-methoxyphenyl)diazenyl]-2-naphtholwas estimated to be 430.05 ˚C

Other supporting study from authoritative database indicates that the boiling point of chemical 1-[(2-methoxyphenyl)diazenyl]-2-naphthol was estimated to be 491.0±30.0 °C  at 760 Torr pressure.

Density:

Based on prediction done using ACD/I-Lab 2.0,the density of chemical 1-[(2-methoxyphenyl)diazenyl]-2-naphthol was estimated to be 1.19 ± 0.1 g/cm3.

Other supporting study from authoritative database also indicates that the density of chemical 1-[(2-methoxyphenyl)diazenyl]-2-naphthol was estimated to be 1.19 ± 0.1 g/cm3 at 20 degree C and 760 Torr pressur

Particle Size Distribution:

The particle size distribution of test item 1-[(2-methoxyphenyl)diazenyl]-2-naphthol 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.

Vapor Pressure:

Data from various authoritative databases suggests that the estimated vapor pressure of Solvent Red 1 at 25 deg C was 6.3X10-9mmHg = 8.39E-07 Pa.

Partitin Coefficient:

Capacity factors were determined for 20 disperse and solvent dyes by a high performance liquid chromatographic method using methanol/water and a C-18 reverse-phase column. Regression equations are given that establish relationships among capacity factors, water solubilities and octanol/water partition coefficients. The method used was similar to OECD GUIDELINES 117.

The liquid chromatographic system comprised a PerkinElmer Series 2000 pump, a Varian Vari-Chrom absorbance detector and an Alltech Econosil C-18 (10.urn)column (4,6 mm x 25 cm with guard column). The mobile phase, HPLC-grade methanol and deionized water (75/25 vol. %), was filtered for use at a flow rate of 1,3 ml/min, Detection was at the wavelength of maximum absorbance in the visible spectra.

The experimental octanol water partition coefficient (log Pow) of Solvent Red 1 was determined to be 7.5

Data from various authoritative databases and peer reviewed articles also indicate that the experimental octanol water partition coefficient (log Pow) of Solvent Red 1 was 7.5

Water Solubility:

The experimental water solubility of Solvent Red 1 at 25°C was determined 3.3x10-4mg/l.

Data from various authoritative databases also suggests that the experimental water solubility of the test chemical at 25°C is 3.3x10-4mg/l.

Thus, Solvent Red 1 can be considered to be insoluble in water.

Surface tension:

Based on the data from ACD labs, surface tension for test item 1-[(2-methoxyphenyl)azo]-2-naphthol was predicted to be 44.8 ± 7.0 dyne/cm.

Flash point:

The flash point of 1-[(2-methoxyphenyl)azo]-2-naphthol (1229 -55 -6) was calculated to be 239.14 degree C. Based on criteria mentioned in CLP regulation the substance 1-[(2-methoxyphenyl)azo]-2-naphthol(1229 -55 -6) was considered to be non flammable.

Autoflammability:

1-[(2-methoxyphenyl)azo]-2-naphthol did not catch fire on being exposed to air at room temperature of 27°Cpressure of 966 hPa. This indicates that 1-[(2-methoxyphenyl)azo]-2-naphthol is not auto-flammable.

Flammability:

1-[(2-methoxyphenyl)azo]-2-naphthol 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 1-[(2-methoxyphenyl)azo]-2-naphthol is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 1-[(2-methoxyphenyl)azo]-2-naphthol 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 the organic substance contains oxygen or halogen atoms which are chemically bonded only to carbon or hydrogen and hence, the classification procedure does not need to be applied

Viscosity:

The study does not need to be conducted because the substance is a solid