The following substances have been added to the Hazardous Substances Schedule of the Singapore Environmental Protection and Management (Hazardous Substances) Regulations as per S 82/2023:

1. 2,2-Diphenyl-2-hydroxyacetic acid

2. Alkyl (Me, Et, n-Pr or i-Pr) phosphonyldifluorides

3. Amiton

4. 3-Quinuclidinyl benzilate

5. Carbamates (quaternaries and bisquaternaries of dimethylcarbamoyloxypyridines)

6. Chemicals, except for those listed in Schedule 1 of the Annex on Chemicals of the Chemical Weapons Convention, containing a phosphorus atom to which is bonded one methyl, ethyl or propyl (normal or iso) group but not further carbon atoms

7. Chlorosarin

8. Chlorosoman

9. Cyanogen chloride

10. Dialkyl (Me, Et, n-Pr or i-Pr) N,N-dialkyl (Me, Et, n-Pr or i-Pr)-phosphoramidates

11. Diethyl phosphite

12. Lewisites

13. Methyl-(bis(diethylamino)methylene)phosphonamidofluoridate

14. N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethane-2-thiols and corresponding protonated salts

15. N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethyl-2-chlorides and corresponding protonated salts

16. Nitrogen mustards

17. O-Alkyl (≤C10, incl. cycloalkyl) alkyl (Me, Et, n-Pr or i-Pr)-phosphonofluoridates

18. O-alkyl (H or ≤C10, incl. cycloalkyl) N-(1-(dialkyl(≤C10, incl. cycloalkyl)amino))alkylidene(H or ≤C10, incl. cycloalkyl) phosphoramidofluoridates and corresponding alkylated or protonated salts

19. O-Alkyl (H or ≤C10, incl. cycloalkyl) O-2-dialkyl (Me, Et, n-Pr or i-Pr)-aminoethyl alkyl (Me, Et, n-Pr or i-Pr) phosphonites and corresponding alkylated or protonated salts

20. O-Alkyl (H or ≤C10, incl. cycloalkyl) S-2-dialkyl (Me, Et, n-Pr or i-Pr)-aminoethyl alkyl (Me, Et, n-Pr or i-Pr) phosphonothiolates and corresponding alkylated or protonated salts

21. Р-alkyl (H or ≤C10, incl. cycloalkyl) N-(1-(dialkyl(≤C10, incl. cycloalkyl)amino))alkylidene(H or ≤C10, incl. cycloalkyl) phosphonamidic fluorides and corresponding alkylated or protonated salts

22. 1,1,3,3,3-Pentafluoro-2-(trifluoromethyl)-1-propene

23. Quinuclidin-3-ol

24. Ricin

25. Saxitoxin

26. Thiodiglycol

27. Thionyl chloride

28. Triethanolamine

The amendment will come into operation on 21 August 2023.