H,-50,.0H

formed by the action of fuming sulphuric acid tok nitric acid on phenyl mercaptan or eae sul; Iphide, forming deliquescent tabular c [B, 3, 4.] also B’disulhonic acid.—B's ulphonic chloride. An oily liquid, C,H,.S0g.- , which congeals at 0° C. into rhombic crystals. [B, 3B su - phurous acid. See B’sulphinic acid. —B*tetra carbonic acid. Ger., Benzoltelracarbonsäure. Prehnitic acid. [B, 196.]—B’tri carbonic acid, Ger., Benzol tri carbonsäure, name expre ive of the constitution of trimesitic, hem i mellitic, and tri mellitic acids. B, 196.|— B’trichlorhydrin, B. trichlortribydrate. Ger.… enzoltrichlorirtrihydrat, An addition compound of b., chlorine, and hydroxyl, CyH,.(OH)s3Cls, forming colorle crystals which melt. at 10° C. falled also b'hypochlorous acid, because it may be regarded as b. united with three molecules of hy} chlorous acid. [B, 4,.|—B’tri sulphonic acid. Fr., acide trisw Vo-benzotique (ou benzine-trisul fon i que). Ger., Benzol trisul fonsäure. A tribasic acid, C,11,(SOg.OH)y + 3H,0, forming hygroscopic, flattened acicular crystals." [B, 3.]