For preparations of difenzoquat methylsulphate, see difenzoquat preparations.
According to Appendix VI of Regulation (EC) No 1272/2008 (CLP Regulation), the substance is classified as Acute Tox. 4* (H302) (equivalent to minimum classification). However, BAM has values for oral and dermal toxicity (source: Sigma Aldrich) which lead to a classification in Class 6.1, packing group III. If other toxicity data are available to the user, the substance is to be classified accordingly. The environmental hazard must also be taken into account.