(chemistry) the unstable acid H₂S₂O₄, known only as its derivatives, the dithionites

(obsolete, inorganic chemistry) hydrogen cyanide

(chemistry) The relationship between the acidity of a solution and the concentration of its solute.

(chemistry) Any polymer of acrylic acid

(chemistry, dated) The poisonous glucoside saponin.

(chemistry) Any polyunsaturated fatty acid

(chemistry) A polymer of methacrylic acid

(organic chemistry, pharmacology) An organic unsaturated fatty acid derived from natural castor oil (ricinoleic acid). It has fungicidal properties and is used in the treatment of skin disorders, nail fungus etc.

(inorganic chemistry) Any of several ill-defined polymers of orthophosphoric acid; they are viscous, hygroscopic liquids

(inorganic chemistry) Ordinary phosphoric acid, H₃PO₄