| water pollution class: |
(German abbreviation: WGK). According to the German "Catalog of water polluting substances" a number between 1 and 3 - that corresponds to the relative hazard of a chemical for aquatic life. (1 means - weakly hazardous, 3 means strongly hazardous). Substances which pose no threat to the aquatic environment are classified as "n.w.g." - which means "not water polluting". |
|
|
