Chem. [f. SULPHO- + ACID.]
a. An acid obtained from another acid by substituting sulphur for oxygen; as sulphocyanic acid, CNHS, from cyanic acid, CNHO: now called THIO-ACID. b. An acid that contains the group SO2 . OH united to carbon. (See SULPHONIC.)
1857. Q. Jrnl. Chem. Soc., IX. 248. A method is thus indicated by which probably all the hydrocarbons, Cn2–2 Hn2, may be prepared from the corresponding sulpho-acids.
1857. Miller, Elem. Chem., Org., iii. § 3. 141. The hydrates of these sulpho-acids are more unstable than their metallic salts.
