| Subject | Catalan | English |
| environ. | àcid clorhídric | hydrochloric acid A solution of hydrogen chloride gas in water; a poisonous, pungent liquid forming a constant-boiling mixture at 20% concentration in water; widely used as a reagent, in organic synthesis, in acidizing oil wells, ore reduction, food processing, and metal cleaning and pickling. Also known as muriatic acid, HCl |
| environ. | àcid diluït | diluted acid A less concentrated acid |
| environ. | àcid nucleic | nucleic acid Any of several organic acids combined with proteins (DNA or RNA) which exist in the nucleus and protoplasm of all cells |
| environ. | àcid sulfhídric | hydrogen sulphide Flammable, poisonous gas with characteristic odour of rotten eggs, perceptible in air in a dilution of 0.002 mg/l. It is used as a reagent in chemical analysis; extremely hazardous; collapse, coma and death from respiratory failure may come within a few seconds after one or two inspirations; low concentrations produce irritation of conjunctiva and mucous membranes. Headache, dizziness, nausea, lassitude may appear after exposure, H2S |
| environ. | àcid sulfúric | sulphuric acid A toxic, corrosive, strongly acid, colorless liquid that is miscible with water and dissolves most metals, and melts at 10C; used in industry in the manufacture of chemicals, fertilizers and explosives, and in petroleum refining |
