On 20 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. 2-Propenoic acid, 2-methyl-, C9-18-alkyl esters, homopolymers (average MW 77000 g/mol)

   WGK 1 (slightly hazardous to water)

2. Alcohols, C9-11-branched

   WGK 1 (slightly hazardous to water)

3. Nonylphenol, ethoxylated, sulfate, EO 4, ammonium salt (average molar weight 485 g/mol)

   WGK 1 (slightly hazardous to water)

4. Titanium, particle size < 1 mm

   WGK nwg (non-hazardous to water)

5. Butane-1,3-diyl diacrylate

   WGK 2 (obviously hazardous to water)

6. (2,4,6-Trioxo-1,3,5-triazine-1,3,5(2H,4H,6H)-triyl)tri-2,1-ethanediyl triacrylate

   WGK 2 (obviously hazardous to water)

7. Glycerol, propoxylated, esters with acrylic acid, reaction products with diethylamine, PO 1 – 6.5

   WGK 1 (slightly hazardous to water)

8. Tetrahydrofurfuryl acrylate

   WGK 3 (highly hazardous to water)

9. Fatty acids, C16-18 and C18-unsatd., Me esters, sulfurized (average molecular weight 1072 g/mol)

   WGK 1 (slightly hazardous to water)

10. Fatty acids, C8-10, polymers with adipic acid and trimethylolpropane (average mw 1270 g/mol)

    WGK 1 (slightly hazardous to water)

11. Siloxanes and Silicones, di-Me, 3-(2-hydroxyethoxy)propyl group-terminated polymers with succinic anhydride (average MW 58354 g/mol)

    WGK 1 (slightly hazardous to water)

12. Polymer with 2-decyloxiran, 2-methyloxirane and polytetrahydrofuran (average MW 3500 g/mol)

    WGK 1 (slightly hazardous to water)

13. Reaction mass of decyl acrylate and octyl acrylate

    WGK 2 (obviously hazardous to water)

14. Polymer with trimethylolpropane and adipic acid, ester with 2-propylheptanol, 4-methyl-2-propylhexan-1-ol and 5-methyl-2-propyl-1-hexanol (average molecular weight 1290 g/mol)

    WGK 1 (slightly hazardous to water)

15. Polymer with decyloxiran, 1,2-epoxybutane and polytetrahydrofuran (average MW 7000 g/mol)

    WGK 1 (slightly hazardous to water)

16. (2,2-Dimethyl-1,3-dioxolan-4-yl) methyl prop-2-enoate

    WGK 2 (obviously hazardous to water)

17. 1,12-Dodecylbisphosphonic acid

    WGK 1 (slightly hazardous to water)

18. Reaction products with Triethylene glycol and 3-Aminopropyltriethoxysilane

    WGK 1 (slightly hazardous to water)

19. (R*, R*) – 1,4-Dimercaptobutane-2,3-diol

    WGK 2 (obviously hazardous to water)

20. Hydroxyl-2-pyridone

    WGK 1 (slightly hazardous to water)

21. N-[4-[[(2-amino-3,4,5,6,7,8-hexahydro-4-oxo-6-pteridinyl)methyl]amino]benzoyl]-L-glutamic acid

    WGK 1 (slightly hazardous to water)

22. Siloxanes and Silicones, di-Me, 3-hydroxypropyl Me, ethers with polyethylene glycol mono-Me ether (average molar weight 1002 g/mol)

    WGK 2 (obviously hazardous to water)

23. Santalene oil: fermentation products of glucose with santalene synthase modified Rhodobacter sphaeroides, distilled

    WGK 1 (slightly hazardous to water)

24. Poly(oxy-1,2-ethanediyl), α-[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropyl]-ω-[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]- (average molar weight 714 g/mol)

    WGK 1 (slightly hazardous to water)

25. Caseins, potassium complexes

    WGK 1 (slightly hazardous to water)

26. 1H-Benzotriazole, compound with 2-aminoethanol

    WGK 2 (obviously hazardous to water)