(chemistry) The acid H₂AsOH derived from arsine. / (chemistry) Any of its hydrocarbyl derivatives.

(organic chemistry) Any organic derivative of H₂N⁺O⁻OH, especially the alkylidene derivatives R₂C=N⁺O⁻OH - the nitronic acids.

(inorganic chemistry) the acid HAs(OH)₂ derived from arsine / (organic chemistry) any of its hydrocarbyl derivatives

(chemistry) any of a class of organic compounds of general formula RN⁺(O⁻)(OH)₂

(inorganic chemistry) the acid HAs(=O)(OH)₂ derived from arsine / (organic chemistry) any hydrocarbyl derivative of this compound

(organic chemistry) Any compound of general formula R₂BOH.

(inorganic chemistry) Any compound of general formula RB(OH)₂.

(chemistry) Any molecular entity capable of donating a proton to a base.

(biochemistry) Any carboxylic acid formed by oxidation of the terminal -CH₂OH of an aldose

(obsolete, chemistry) any aldaric acid