On 9 February 2024, the German Ordinance on Facilities Handling Substances That Are Hazardous to Water (AwSV) List of published water hazard class (WGK) classifications was updated. The following substance was newly assigned a WGK:

1. Zinc, [μ-[ethanedioato(2-)-κO1,κO′2:κO2,κO′1]]bis(1H-1,2,4-triazolato-κN1)di-

   WGK 2 (obviously hazardous to water)