Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

In aquatic systems, valeryl chloride (CAS 638-29-9) hydrolyses quickly and forms HCl (CAS 7647-01-0) and valeric acid (CAS 109-52-4) (for details see section 5.1.2).

Short-term toxicity to fish:

Parent compound valeryl chloride: With high probability acutely not harmful to fish after pH-adjustment (96-h LC50 = 68.1 mg/L, not pH-adjusted; LC50 > 100 mg/L, pH-adjusted).

Short-term toxicity to aquatic invertebrates:

Parent compound: No data available.

Hydrolysis product valeric acid: Acutely harmful to aquatic invertebrates (48-h LC50 = 45 mg/L).

Hydrolysis product HCl: Acutely very toxic for aquatic invertebrates (pH dependent; 48-h EC50 = 0.492 mg/L). These data have not been taken into consideration to evaluate aquatic toxicity as observed effects are caused by a pH-shift in the test medium.

Growth inhibition to aquatic algae:

Parent compound: No data available.

Hydrolysis product: Acutely harmful to aquatic algae (72 -h EC50 = 31.3 mg/L).

Hydrolysis product HCl: Acutely very toxic for aquatic organisms (pH dependent; 72-h ErC50 = 0.492 mg/L). These data have not been taken into consideration to evaluate aquatic toxicity as observed effects are caused by a pH-shift in the test medium.

Toxicity to microorganisms:

Parent compound: No data available.

Hydrolysis product valeric acid: The inhibition of the degradation activity of activated sludge is not anticipated when introduced in appropriately low concentrations (40-h EC50 = 189 mg/L).

Hydrolysis product HCl: No data available.