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PBT assessment

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PBT assessment: overall result

Methyl chloroformate
Type of composition:
legal entity composition of the substance
State / form:
Reference substance:
Methyl chloroformate
PBT status:
the substance is not PBT / vPvB

The assessed substance rapidly hydrolizes and decomposes in water into the main products methanol (CAS 67 -56 -1), CO2 (CAS 124-38-8) and HCl (CAS 7647-01-0). As CO2 evaporates and HCl will be neutralized under environmentally relevant conditions, its organic hydrolization product methanol was also used for the PBT assessment. The environmental assessment is mainly based on its hydrolysis product methanol (CAS 67-56-1).

Since methanol is readily biodegradable (according to OECD criteria) it should be regarded as not P/vP. Methanol is not B/vB since it has a log Kow less than 3 (see IUCLID chapter 4.7).

Due to the rapid hydrolysis of the parent compound methyl chloroformate (CAS 79-22-1) and in absence of the chronic toxicity data for the compound itself, the assessment of T properties is based on the hydrolysis product methanol (CAS 67-56-1). Methanol is not T since the lowest available chronic value is >> 0.01 mg/L (Algae: 8 -d TT (EC3): 8000 mg/L, Bringmann and Kuehn) and the substance holds no relevant classification.

In conclusion, the parent compound methyl chloroformate (CAS 79-22-1) is considered to be neither PBT nor vPvB, based on the available data for the hydrolysis product methanol (CAS 67-56-1).