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Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Appearance:

On the basis of physical observations, it is concluded that pyrazine-2-carboxylic acid is physically occur in white needle form.

Melting point:

It is concluded that the decomposition temperature of pyrazine-2-carboxylic acid is 225 °C. At this temperature pyrazine-2-carboxylic acid starts decomposing. From the other reliable sources it concluded that pyrazine-2-carboxylic acid having decomposition temperature in range of 222 to 225 Deg C.

Boiling Point:

the study does not need to be conducted because the substance is a solid which decomposes before boiling (It is concluded that the decomposition temperature of pyrazine-2-carboxylic acid is 225 °C. At this temperature pyrazine-2-carboxylic acid starts decomposing.)

Density:

Density of pyrazine-2-carboxylic acid is observed to be 1.4317g/cm3 at 25 Deg C.

Particle size distribution:

The particle size distribution of Pyrazine-2-carboxylic acid was determined by granulometric analysis with rotap sieve shaker. The particle size distribution was determined to be in the range of 150 micron to 53 micron.

Vapour pressure:

The estimated vapour pressure of Pyrazine-2-carboxylic acid at 25 deg C was 0.0114 Pa.

Partition coefficient

Based on the available data from authoritative databases, the partition coefficient (log Pow) value of the substancePyrazine-2 -carboxylic acidwas estimated to be -0.18. Based on the estimated value, the chemicalPyrazine-2 -carboxylic acidcan be considered to be hydrophilic in nature.

Water solubility:

WSKOW v1.42 was used to estimate the water solubility of Pyrazine-2-carboxylic acid

The estimated water solubility of Pyrazine-2-carboxylic acid at 25 deg C was 137000 mg/l

Based on the estimated value, Pyrazine-2-carboxylic acid was soluble in water.

Surface tension:

Based on the data from ACD labs, surface tension for Pyrazine-2-carboxylic acid was predicted to be 0.0721 N/m.

Flash point:

Flash point of pyrazine-2-carboxylic acid is predicted to be 142.1 Deg C.

Auto flammability:

Pyrazine-2-carboxylic acid did not catch fire on being exposed to air at room temperature of 27 °C pressure of 966 hPa. This indicates that  Pyrazine-2 -carboxylic acid is not auto-flammable.

Flammability:

Pyrazine-2-carboxylic 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 Pyrazine-2-carboxylic acid is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus Pyrazine-2-carboxylic acid was considered non-flammable for chemical safety assessment. Flash point of pyrazine-2-carboxylic acid is predicted to be 142.1 Deg C. So GHS criteria cannot be fulfilled by pyrazine-2-carboxylic acid.

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.

Oxidizing 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.

Additional information

Appearance:

On the basis of physical observations, it is concluded that pyrazine-2-carboxylic acid is physically occur in white needle form.

Melting point:

It is concluded that the decomposition temperature of pyrazine-2-carboxylic acid is 225 °C. At this temperature pyrazine-2-carboxylic acid starts decomposing. From the other reliable sources it concluded that pyrazine-2-carboxylic acid having decomposition temperature in range of 222 to 225 Deg C.

Boiling Point:

the study does not need to be conducted because the substance is a solid which decomposes before boiling (It is concluded that the decomposition temperature of pyrazine-2-carboxylic acid is 225 °C. At this temperature pyrazine-2-carboxylic acid starts decomposing.)

Density:

Density of pyrazine-2-carboxylic acid is observed to be 1.4317g/cm3 at 25 Deg C.

Particle size distribution:

The particle size distribution of Pyrazine-2-carboxylic acid was determined by granulometric analysis with rotap sieve shaker. The particle size distribution was determined to be in the range of 150 micron to 53 micron.

Vapour pressure:

The estimated vapour pressure of Pyrazine-2-carboxylic acid at 25 deg C was 0.0114 Pa.

Partition coefficient

Based on the available data from authoritative databases, the partition coefficient (log Pow) value of the substancePyrazine-2 -carboxylic acidwas estimated to be -0.18. Based on the estimated value, the chemicalPyrazine-2 -carboxylic acidcan be considered to be hydrophilic in nature.

Water solubility:

WSKOW v1.42 was used to estimate the water solubility of Pyrazine-2-carboxylic acid

The estimated water solubility of Pyrazine-2-carboxylic acid at 25 deg C was 137000 mg/l

Based on the estimated value, Pyrazine-2-carboxylic acid was soluble in water.

Surface tension:

Based on the data from ACD labs, surface tension for Pyrazine-2-carboxylic acid was predicted to be 0.0721 N/m.

Flash point:

Flash point of pyrazine-2-carboxylic acid is predicted to be 142.1 Deg C.

Auto flammability:

Pyrazine-2-carboxylic acid did not catch fire on being exposed to air at room temperature of 27 °C pressure of 966 hPa. This indicates that  Pyrazine-2 -carboxylic acid is not auto-flammable.

Flammability:

Pyrazine-2-carboxylic 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 Pyrazine-2-carboxylic acid is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus Pyrazine-2-carboxylic acid was considered non-flammable for chemical safety assessment. Flash point of pyrazine-2-carboxylic acid is predicted to be 142.1 Deg C. So GHS criteria cannot be fulfilled by pyrazine-2-carboxylic acid.

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.

Oxidizing 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.