Registration Dossier
Registration Dossier
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EC number: 200-848-3 | CAS number: 75-20-7
Endpoint summary
Administrative data
Description of key information
In contact with water/soil pore water calcium carbide instantly hydrolysis to calcium hydroxide and acetylene. Thus these two compounds are relevant in the assessment of the environmental fate.
OH- ions relaesed from calcium hydroxide are neutralized in the environment. Respective Ca2+ ions have a low tendency for adsorption to soil/sediments. Available Kd values range between 5.3 and 49.1 L/kg.
In the second experiment, the Kd value of Ca2+ adsorption to soil particles was calculated to be 11.3 L/kg and thus is within the range of the Kd values determined in the first study.
Acetylene has a very low log Kow (0.37). In addition, the substance is a gas with high vapour pressure and high Henry Law constant and will not remainin the water phase/soil pore water. Thus, significant adsorption of acetylene to soil and sediments is not expected.
Additional information
In contact with water/soil pore water calcium carbide instantly hydrolysis to calcium hydroxide and acetylene. Thus these two compounds are relevant in the assessment of the environmental fate.
OH- ions relaesed from calcium hydroxide are neutralized in the environment. Respective Ca2+ ions have a low tendency for adsorption to soil/sediments. Available Kd values range between 5.3 and 49.1 L/kg.
In the second experiment, the Kd value of Ca2+ adsorption to soil particles was calculated to be 11.3 L/kg and thus is within the range of the Kd values determined in the first study.
Acetylene has a very low log Kow (0.37). In addition, the substance is a gas with high vapour pressure and high Henry Law constant and will not remainin the water phase/soil pore water. Thus, significant adsorption of acetylene to soil and sediments is not expected.
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