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Classification & Labelling & PBT assessment

PBT assessment

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PBT assessment: overall result

Reference
Name:
zinc bis(diethyldithiocarbamate)
Type of composition:
legal entity composition of the substance
State / form:
solid: bulk
Reference substance:
Composition 1
PBT status:
the substance is not PBT / vPvB
Justification:

Persistence

The test substance is considered to be not readily biodegradable based on read-across data. Even though substantial abiotic degradation is observed in a GLP-compliant hydrolysis study, according to OECD TG 111, the substance is still classified as 'vP (and P)'. No complete degradation profile could be derived (the only degradation product detected in the hydrolysis study was CS2) and the hydrolysis degradation rates are not consistent over the environmental pH range (pH 4 - pH 9).

Bioaccumulation

A BCF value of 9.97 L/kg was determined in a pilot study preceding a planned OECD 305 study. Based on this information and a predicted log Kow of ≤ 4.5, the test substance is considered to be 'not B'.

Toxicity

Because an aquatic long-term NOEC value of 3.2 µg/L is available and the substance is classified as STOT RE 2, the substance is considered to be 'T'.