New update for Candidate List of Substances of Very High Concern (SVHCs) On 6/14, 2023, the ECHA (European Chemicals Agency) released the new Candidate List of SVHCs. With the addition of 2 new substances, Diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide and Bis(4-chlorophenyl) sulphone, the current list of SVHCs now contains 235 substances.