[GB] Proposed Mandatory Harmonised Classifications of Chemicals

In March 2025, GB proposed to the World Trade Organisation (WTO), mandatory classification and labelling of 30 hazardous chemical substances.

They are as follows:

  • perboric acid, sodium salt [1];
  • perboric acid, sodium salt, monohydrate [2]; perboric acid (HBO(O2)), sodium salt,
  • monohydrate; sodium peroxoborate [3];
  • sodium perborate [4   H272, H360FD, H331, H302, H335, H318
  • Silver massive: [particle diameter ≥ 1 mm] 2 H361f, STOT RE 2 H373 (nervous system)
  • Silver powder: [particle diameter > 100 nm < 1 mm] Repr.2 H361f, STOT RE 2 H373 (nervous system), H410
  • Silver nano: [particle diameter > 1 nm ≤ 100 nm] Repr.2 H361f, STOT RE 2 H373 (nervous system), H410
  • 1-hydroxy-4-(p-toluidino)anthraquinone (Solvent Violet 13) H317 Skin sens. 1B
  • 1,2-dihydroxy-9,10-dihydroanthracene-9,10-dione (Pigment Red 83) H317 Skin sens. 1B
  • 2-ethylhexanoic acid, monoester with propane-1,2-diol
  • N-1-naphthylaniline; N-phenylnaphthalen-1-amine
  • α,α’-propylenedinitrilodi-o-cresol
  • ozone
  • bixlozone (ISO); 2-(2,4-dichlorobenzyl)-4,4-dimethyl-1,2-oxazolidin-3-one;
  • biphenyl-2-ol; 2-phenylphenol; 2-hydroxybiphenyl
  • fenpropidin (ISO); (R,S)-1-[3-(4-tert-butylphenyl)-2- methylpropyl]piperidine
  • tert-butyl 2-ethylperoxyhexanoate (TBPEH)
  • pyraclostrobin
  • di and trimethyl cyclohex-3-ene-1-carbaldehydes
  • 1,4-dichloro-2-nitrobenzene
  • reaction mass of 1,3-dioxan-5-ol and 1,3-dioxolan-4-ylmethanol (glycerol formal)
  • n-hexane
  • copper [specific surface area > 0.67 mm2 /mg]
  • dibenzoyl peroxide; benzoyl peroxide
  • N,N’-methylenediacrylamide
  • sodium 3-(allyloxy)-2-hydroxypropanesulphonate
  • methyl-1H-benzotriazole
  • 1H-benzotriazole
  • sodium peroxometaborate
  • tetrairon tris(pyrophosphate); ferric pyrophosphate
  • 2-phenylpropene
  • tetraphosphorus trisulphide; phosphorus sesquisulphide
  • pethoxamid (ISO); 2-chloro-N-(2-ethoxyethyl)-N-(2- methyl-1-phenylprop-1-enyl)acetamide
  • dinitrogen oxide

Prepare for Regulatory Impact

The UK’s proposal to the WTO marks a significant step toward mandatory classification and labelling of 30 hazardous substances. Businesses handling these chemicals must begin assessing their portfolios and preparing for potential regulatory changes.

🔍 Review your substance inventory
📄 Evaluate classification and labelling obligations
⚠️ Identify products at risk of non-compliance

Need expert guidance?
Our regulatory specialists can help you interpret the implications and develop a proactive compliance strategy. Get in touch today.

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