On 21 September 2022, 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 substances were newly assigned a WGK:

1. Polymer with 1-decene and sulphur dioxide (average molar weight 3400 g/mol)

   WGK 1 (slightly hazardous to water)

2. Polymer with sodium hydroxybenzenesulfonate, phenol, urea and formaldehyde, residual formaldehyde < 0,1% (average molecular weight 5880 g/mol)

   WGK 1 (slightly hazardous to water)