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EC number: 205-293-0 | CAS number: 137-42-8
Endpoint summary
Administrative data
Description of key information
Appearance:
Chemical Metam-sodium physically appear as a white color crystalline solid.
Melting point:
Chemical metam-sodium does not have melting point it decomposes without melting when heated.
Boiling Point:
The study does not need to be conducted because the substance is a solid which decomposes before boiling. Chemical metam-sodium does not have melting point it decomposes without melting when heated.
Density:
Based on prediction done using ACD/I-Lab 2.0,the density of chemical Metam-sodiuml was estimated to be 1.20 g/cm3.
Particle size distribution:
The particle size distribution of Metam-sodium 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:
Vapour pressure of chemical Metam-sodium is determine to be 2666.44 Pa at temperature 25 Deg C.
Partition coefficient:
Based on the available data from secondary source,the partition coefficient (log Pow) value of the substance Metam-sodium was determined according to OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method) and was evaluated to be -1.89. Based on the experimental value, chemical Metam-sodium can be considered to be hydrophilic in nature.
Water solubility:
Water solubility of chemical metam-sodium is determine to be 722000 mg/L at temperature 20 Deg C. From this water solubility value it is concluded that chemical Metam-sodium is very 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. Metam-sodium (CAS no. 137-42-8) is used as a soil fumigant, pesticide, herbicide, and fungicide. For this use, surface activity is not an important property. Hence this study was considered for waiver.
Flash point:
The study does not need to be conducted because decomposition occurred during the melting point study.
Auto flammability:
Metam-sodium did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that Metam-sodium is not auto-flammable.
Flammability:
Metam-sodium 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 Metam-sodium is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus Metam-sodium was considered non-flammable.
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 substance is a solid.
Additional information
Appearance:
Chemical Metam-sodium physically appear as a white color crystalline solid.
From other reliable sources & authoritative database it is concluded that chemical Metam-sodium appear as a crystalline solid having unpleasent odor & colorless crystals with an odor like that of carbon disulfide.
Melting point:
Chemical metam-sodium does not have melting point it decomposes without melting when heated.
Boiling Point:
The study does not need to be conducted because the substance is a solid which decomposes before boiling. Chemical metam-sodium does not have melting point it decomposes without melting when heated.
Density:
Based on prediction done using ACD/I-Lab 2.0,the density of chemical Metam-sodiuml was estimated to be 1.20 g/cm3.
Particle size distribution:
The particle size distribution of Metam-sodium 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:
Vapour pressure of chemical Metam-sodium is determine to be 2666.44 Pa at temperature 25 Deg C.
From other reliable sources it is concluded that vapour pressure of chemical Metam-sodium is 2799.76 Pa at temperature 25 Deg C.
Partition coefficient:
Based on the available data in a key study from secondary source,the partition coefficient (log Pow) value of the substance Metam-sodium was determined according to OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method) and was evaluated to be -1.89.
In a supportingstudy from authoritative database and secondary source,the partition coefficient (log Pow) value of the substance Metam-sodium was determined to be ranges from -2.04 to -2.05 at a temperature of 22°C and pH 7.0, respectively.
Another supportingstudy from handbook and authoritative databases,the partition coefficient (log Pow) value of the substance Metam-sodium was determined to be <1.0 at a temperature of 25°C, respectively.
In an additional study from secondary source indicates that the partition coefficient (log Pow) value of the substance Metam-sodium was determined to be -2.15 at pH 9.0, respectively.
Thus, on the basis of available information, the logKow value of the chemical Metam-sodium was determined to be ranges from <1.0to -2.05, respectively. On the basis of this value, chemical Metam-sodium can be considered to be hydrophilic in nature.
Water solubility:
Water solubility of chemical metam-sodium is determine to be 722000 mg/L at temperature 20 Deg C. From this water solubility value it is concluded that chemical Metam-sodium is very 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. Metam-sodium (CAS no. 137-42-8) is used as a soil fumigant, pesticide, herbicide, and fungicide. For this use, surface activity is not an important property. Hence this study was considered for waiver.
Flash point:
The study does not need to be conducted because decomposition occurred during the melting point study.
Auto flammability:
Metam-sodium did not catch fire on being exposed to air at room temperature of 27°C pressure of 966 hPa. This indicates that Metam-sodium is not auto-flammable.
Flammability:
Metam-sodium 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 Metam-sodium is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus Metam-sodium was considered non-flammable.
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 substance is a solid.
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