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Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Appearance:

On the basis of physical observation and using the sense of smell, test chemical was observed to be a white crystalline powder.

Melting point :

The melting point determination of test chemical was done following OECD Guideline 102 and according to the metal block capillary method. The mean melting temperature range was determined to be 118.6-121.5°C at 974.9 hPa.

Boiling point :

The boiling point determination of test chemical was done following OECD Guideline 103 and according to the method of Siwoloboff. The test item does not show string of bubbles up to 300 deg C, inferring boiling point to be greater than 300 deg C at 976.4 hPa.

Density :

The mean density of test chemical was determined to be 1.2460 g/cm³ at 20 °C and 973.1hPa.

Particle size distribution (Granulometry):

The particle size distribution of test item 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.

Vapour pressure:

Available data from prediction database and handbook estimates the vapour pressure of the test chemical at 25°C is 0.00217 Pa.

Partition coefficient:

Based on the available data from experimental study report,the partition Coefficient n-octanol/water of test chemical was determined by the Reverse Phase High Performance Liquid Chromatographic method according to OECD Guideline No. 117 for testing of Chemicals. A test item solution was prepared by accurately weighing 5 mg of test item and diluted with ACN up to 10 ml. Thus, the test solution concentration was 500 mg/l. The pH of test substance was 6.08. The reference substances were chosen according to functional similarity with the test substance and calibration graph was prepared .The reference substances were Biphenyl,Toluene, n-Butylbenzene, Naphthalene, 4 -Acetylpyridine having Pow value ranging from 0.5 to 4.6. The Log Pow value was found to be 0.119 ± 0.008 at 25°C. The partition Coefficient n-octanol/water of test chmeical was determined by the Reverse Phase High Performance Liquid Chromatographic method according to OECD Guideline No. 117 for testing of Chemicals. The reference substances were chosen according to estimated Pow range of the test substance and generalized calibration graph was prepared. The reference substances were having Pow value ranging from 0.5 to 4.6 .The Log Pow value was determined to be 0.119 ± 0.008 dimensionless at 25°C. On the basis of this value, test chemical can be considered to be hydrophobic in nature.

Water solubility :

The water solubility determination of test chemical was done by spectrophotometric method. The water solubility was determined to be 2589.98 mg/L at 30°C. This value indicates the chemical is soluble 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. Test chemical is primarily used as a photographic developer. For this use, surface activity is not a desired property. Hence this study was considered for waiver.

Flash point :
The mean flash point of test chemical is 135.3°C at 973.9hPa.

Auto flammability:

Test chemical did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that test chemcial is not auto-flammable.

Flammability:

Test chemicaldoes 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 test chemical is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus test chemical was considered non-flammable.

Explosiveness:

In accordance with column 2 of Annex VII of the REACH regulation, the study does not need to be conducted since there are no chemical groups associated with explosive properties present in the molecule of test chemical. Thus, this end point was considered for waiver and the chemical is considered to be "Non explosive".

Oxidizing properties:

In accordance with column 2 of Annex VII of the REACH regulation, test substance is incapable of reacting exothermically with combustible materials on the basis of the chemical structure. It is an organic substance containing an oxygen atom but no halogen atoms. Also, the oxygen atom is not chemically bonded to nitrogen or oxygen. Thus, the chemcial is likely to be "Non-oxidising".

pH :

The pH of 1% w/v dispersion of the test chemical was determined to be 4.02 at 30 °C.

Additional information

Appearance:

On the basis of physical observation and using the sense of smell, test chemical was observed to be a white crystalline powder.

From other reliable sources & authoritative databases, the test chemical is a white powder, needles or leaflets from benzene organic solid.

Melting point :

The melting point determination of Test chemical was done as per the test guideline OECD 102. The method followed was according to Capillary/metal block. The test was conducted in replicates and mean melting temperature range was determined to be 118.6-121.5°C at 974.9hPa. From other reliable sources & authoritative databases,the Melting point of test chemical is determined to be in the range of 119 - 126°C.

Boiling point :

The boiling point determination of Test chemical was done as per the test guideline OECD 103. The method followed was according to Siwoloboff. The test item does not show string of bubbles upto 300 deg C,inferring boiling point to be greater than 300 deg C at 976.4 hPa.

From other reliable sources boiling point of test chemical is determine to be 288.88 Deg C.

Density :

The density of Test chemical was determined following OECD guideline 109 and according to the method adapted from ASTM D 854-02. The mean density of the test item was determined to be 1.2460 g/cm³ at 20 °C and 973.1hPa.

Particle size distribution (Granulometry):

The particle size distribution of test item 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.

Vapour pressure:

Available data from prediction database and handbook estimates the vapour pressure of the test chemical at 25°C is 0.00217 Pa.

 

Partition coefficient:

Based on the available data in a key study from experimental study report, the partition Coefficient n-octanol/water of test chemical was determined by the Reverse Phase High Performance Liquid Chromatographic method according to OECD Guideline No. 117 for testing of Chemicals. A test item solution was prepared by accurately weighing 5 mg of test item and diluted with ACN up to 10 ml. Thus, the test solution concentration was 500 mg/l. The pH of test substance was 6.08. The reference substances were chosen according to functional similarity with the test substance and calibration graph was prepared .The reference substances were Biphenyl,Toluene, n-Butylbenzene, Naphthalene, 4 -Acetylpyridine having Pow value ranging from 0.5 to 4.6. The Log Pow value was found to be 0.119 ± 0.008 at 25°C. The partition Coefficient n-octanol/water of test chmeical was determined by the Reverse Phase High Performance Liquid Chromatographic method according to OECD Guideline No. 117 for testing of Chemicals. The reference substances were chosen according to estimated Pow range of the test substance and generalized calibration graph was prepared. The reference substances were having Pow value ranging from 0.5 to 4.6 .The Log Pow value was determined to be 0.119 ± 0.008 dimensionless at 25°C.

Additional studyfromhandbook, secondary source, authoritative and modelling databases indicates that the octanol water partition coefficient (log Pow) value of the test chemical was determined to be 0.89.

Thus, based on the available information, the logPow valueof the test chemical ranges from 0.119 to 0.89, respectively. On the basis of this value, test chemical can be considered to behydrophilic in nature.

Water solubility:

The water solubility determination of test chemical was done as per the OECD guideline 105 by spectrophotometric analytical method as per OECD 101. The solubility of test chemical in water was determine to be 2589.98 mg/L at 30°C. This value indicates the chemical is soluble in water.

Other supporting data from authoritative database indicates the value of estimated water solubility of the test chemical as 100 mg/l. This also indicates the chemical is highly soluble 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. Test chemical is primarily used as a photographic developer. For this use, surface activity is not a desired property. Hence this study was considered for waiver.

Flash point :

The flash point determination of test chemical was done following closed cup method using Pensky-Martens flash point apparatus. The test was conducted in replicates and mean flash point was determine to be 135.3°C at 973.9 hPa.

Auto flammability:

Test chemical did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that test chemcial is not auto-flammable.

Flammability:

Test chemicaldoes 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 test chemical is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus test chemical was considered non-flammable.

Explosiveness:

In accordance with column 2 of Annex VII of the REACH regulation, the study does not need to be conducted since there are no chemical groups associated with explosive properties present in the molecule of test chemical. Thus, this end point was considered for waiver and the chemical is considered to be "Non explosive".

Oxidizing properties:

In accordance with column 2 of Annex VII of the REACH regulation, test substance is incapable of reacting exothermically with combustible materials on the basis of the chemical structure. It is an organic substance containing an oxygen atom but no halogen atoms. Also, the oxygen atom is not chemically bonded to nitrogen or oxygen. Thus, the chemcial is likely to be "Non-oxidising".

pH :

The pH determination of test chemical was done following OECD guideline 122. pH of 1% w/v dispersion was measured with the help of pH meter and it was observed to be 4.02 at 30 °C.