| antimony trioxide | Sb2O3;used technically in paints and flame-proofing; also used as an expectorant and emetic. Synonym: antimonous oxide, antimony oxide, flowers of antimony. Abbreviation: Sb (05 Mar 2000) |
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| arsenic trioxide | As2O3;dissolves in water to give arsenous acid, H3AsO3; used in the treatment of skin diseases and malaria, and as a tonic; also used externally as a caustic. Synonym: arsenous oxide, white arsenic. (05 Mar 2000) |
| sulfur trioxide | SO3;forms sulfuric acid, H2SO4, by its reaction with water. Synonym: sulfuric oxide. (05 Mar 2000) |
| trioxide | <chemistry> An oxide containing three atoms of oxygen; as, sulphur trioxide, SO3; formerly called tritoxide. Origin: Pref. Tri- + oxide. Source: Websters Dictionary (01 Mar 1998) |
| chromium | <chemical> A trace element that plays a role in glucose metabolism. It has the atomic symbol cr, atomic number 24, and atomic weight 52. According to the fourth annual report on carcinogens (ntp85-002,1985), chromium and some of its compounds have been listed as known carcinogens. Chemical name: Chromium (12 Dec 1998) |
| chromium alloys | Specific alloys not less than 85% chromium and nickel or cobalt, with traces of either nickel or cobalt, molybdenum, and other substances. They are used in partial dentures, orthopedic implants, etc. (12 Dec 1998) |
| chromium compounds | Inorganic compounds that contain chromium as an integral part of the molecule. (12 Dec 1998) |
| chromium isotopes | Stable chromium atoms that have the same atomic number as the element chromium, but differ in atomic weight. Cr-50, 53, and 54 are stable chromium isotopes. (12 Dec 1998) |
| chromium radioisotopes | Unstable isotopes of chromium that decay or disintegrate emitting radiation. Cr atoms with atomic weights of 46-49, 51, 55, and 56 are radioactive chromium isotopes. (12 Dec 1998) |
| chromium(VI) reductase | <enzyme> Nad(p)h-dependent enzyme from pseudomonas ambigua reduces cr(vi) to cr(iii) with at least two reaction steps via cr(v) as an intermediate Registry number: EC 1.16.1.- Synonym: cr(vi) reductase (26 Jun 1999) |