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EC number: 203-439-8 | CAS number: 106-89-8
Based on a growth inhibition study with the protozoan, Entosiphon sulcatum, the 72-hour toxicity threshold for epichlorohydrin is 35 mg/L.
Two microorganism studies were examined for epichlorohydrin and both were deemed reliable and useful for risk assessment. One study examined growth inhibition in the protozoan, Entosiphon sulcatum,over a 72 hour exposure period, while the other study measured growth inhibition of the bacteria, Pseudomonas putida,over a 16-hour exposure period. The growth inhibition test with E. sulcatum reported a toxicity threshold value of 35 mg/L epichlorohydrin. The growth inhibition study with P. putida reported a 16-hour toxicity threshold value of 55 mg/L epichlorohydrin. The value of 35 mg/L was selected as the key parameter for this endpoint, since this was the lowest toxicity value reported for microorganisms.
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