Registration Dossier
Registration Dossier
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EC number: 205-498-5 | CAS number: 141-75-3
Endpoint summary
Administrative data
Description of key information
Additional information
Phototransformation in air
Parent compound butyryl chloride (CAS 141-75-3): After evaporation or exposure to air, the substance will be slowly degraded by photochemical processes.
This estimation refers to dry air. In mist, rain, droplets and aerosols hydrolysis will be the major fate process of the acid chloride due to the short half-life in aqueous solutions.Therefore this estimate may be of low relevance.
Hydrolysis product butyric acid (CAS 107-92-6): After evaporation or exposure to air, the substance will be slowly degraded by photochemical processes.
Hydrolysis
Parent compound butyryl chloride (CAS 141-75-3): Butyryl chloride is determined to hydrolyse rapidly to butyric acid and HCl.
Hydrolysis product butyric acid (CAS 107-92-6): According to Regulation (EC) 1907/2006, Annex VIII, Section 9.2.2.1, Column 2, a study does not need to be performed if the substance is readily biodegradable or inorganic. Butyryl chloride hydrolyses rapidly and forms butyric acid and HCl. Butyric acid is readily biodegradable, while HCl is inorganic.
Biodegradation
Parent compound butyryl chloride (CAS 141-75-3): Butyryl chloride is determined to be readily biodegradable. However, as the parent compound hydrolyses in water within 10 minutes the assessment of the biodegradability is mainly based on the hydrolysis product butyric acid.
Hydrolysis product butyric acid (CAS 107-92-6): Butyric acid is assessed to be readily biodegradable.
Bioaccumulation
Parent compound butyryl chloride (CAS 141-75-3): Significant accumulation in organisms is not to be expected, as the substance has an estimated log Kow of 0.51. However, the assessment of the bioaccumulation potential of the parent compound may be of low relevance, due to the rapid hydrolysis of the acid chloride in aqueous solutions.
Hydrolysis product butyric acid (CAS 107-92-6): The experimental log Kow of 0.79 does not indicate a significant potential for bioaccumulation.
Adsorption / desorption
Parent compound butyryl chloride (CAS 141-75-3): Adsorption to solid soil phase is not expected. However, the assessment of the adsorption potential of the parent compound may be of low relevance, due to the rapid hydrolysis of the acid chlorid in aqueous solutions.
Hydrolysis product butyric acid (CAS 107-92-6): Adsorption to solid soil phase is not expected.
Henry`s Law constant
Parent compound butyryl chloride (CAS 141-75-3): From the water surface, the substance will rapidly evaporate into the atmosphere. However, the assessment of the volatility of the parent compound may be of low relevance due to the rapid hydrolysis of the acid chloride in aqueous solutions.
Hydrolysis product butyric acid (CAS 107-92-6): From the water surface, the substance will not evaporate into the atmosphere.
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