#chemical safety
- Aniline — The simplest primary aromatic amine (with the chemical formula C6H5NH2), appearing as an oily liquid, colorless when pure, but darkening rapidly in contact with air due to oxidation. It represents a raw material of critical structural importance in the global chemical industry, being the foundation for manufacturing synthetic dyes (aniline dyes), polyurethanes, vulcanized rubber, pesticides, and numerous pharmaceuticals.
- Arsenical — Containing arsenic in its chemical structure, relating to arsenic, or derived directly from the compounds of this metalloid. In industrial and medical terms, it describes minerals, thermal mineral waters, industrial waste, or old pharmaceutical preparations that have variable proportions of arsenic in their composition, requiring special protective measures due to cumulative toxicity risks.