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
In aquatic systems, butyryl chloride (CAS 141 -75 -3) hydrolyses quickly and forms HCl (CAS 7647 -01 -0) and butyric acid (CAS 107 -92 -6) (for details see section 5.1.2).
Short-term toxicity to fish
Parent compound butyryl chloride: With high probability acutely not harmful to fish (96 -h LC50 = 299 mg/L).
Hydrolysis product butyric acid: No valid data available, therefore the risk assessment is based on read-across to the structurally similar substance isobutyric acid.
Isobutyric acid: With high probability acutely not harmful to fish (96 -h LC50 = 146.6 mg/L)
Hydrolysis product HCl: Acutely toxic to fish (pH dependent; 96-h LC50 = 4.92 mg/L).
Short-term toxicity to aquatic invertebrates:
Parent compound butyryl chloride: No data available.
Hydrolysis product butyric acid: No valid data available, therefore the risk assessment is based on read-across to the structurally similar substance isobutyric acid.
Isobutyric acid: Acutely harmful to aquatic invertebrates (48 -h EC50 = 51.25 mg/L).
Hydrolysis product HCl: acutely very toxic for aquatic invertebrates (pH dependent; 48-h EC50= 0.492 mg/L).
Growth inhibition to aquatic algae:
Parent compound butyryl chloride: No data available.
Hydrolysis product butyric acid: No valid data available, therefore the risk assessment is based on read-across to the structurally similar substance isobutyric acid.
Isobutyric acid: Acutely harmful to aquatic algae and cyanobacteria (72 -h ErC50 = 53.9 mg/L).
Hydrolysis product HCl: acutely very toxic for aquatic organisms (pH dependent; 72-h ErC50= 0.492 mg/L).
Toxicity to microorganisms:
Parent compound butyryl chloride: No data available.
Hydrolysis product butyric acid: 17 -h EC10 = 39 mg/L
Hydrolysis product HCl: No data available.
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