Chromic acid

Chromium trioxide

Chromium oxide (CrO3);Chromic anhydride;Chromic trioxide;Chromium trioxide;Chromium(VI) oxide;Monochromium trioxide;Chromium oxide (Cr4O12);Chromia (CrO3);Chromium(VI) trioxide;Chromium oxide (Cr0.25O0.75);12324-05-9;12324-08-2;1362947-20-3

1333-82-0

CrO3

InChIKey=WGLPBDUCMAPZCE-UHFFFAOYSA-N

99.99430

99.92530

215-607-8

1194

1463|1755

DTXSID0040125

Dark red, bipyramidal prismatic crystals, flakes or granular powder|Brown solid|Flake, ground powder form|Dark-red ... flakes or powder [Note: Often used in an aqueous solution (H2CrO4)]

2819100000

Bulk Drug Intermediates

51.21000

-0.35640

Chromium trioxide, anhydrous appears as a dark purplish red solid. Under prolonged exposure to fire or heat the containers may explode. Highly toxic. A confirmed human carcinogen.

2.70 g/cm³

197 °C

330ºC

250ºC

H2O: Highly soluble

Do not store near combustible materials. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away fr

Very low

CrO₃: Noncombustible Solid, but will accelerate the burning of combustible materials.

Odorless

Dissolves in water to form a weak acid

Chromium trioxide, CrO3, contains hexavalent chromium. Its molecular weight is 100.01. It is also known as red oxide of chromium, chromic anhydride, chromic acid anhydride and, erroneously, chromic acid.|Heat of fusion: 37.7 cal/g|Deliquescent|Hexavalent chromium is linked to oxygen and is a powerful oxidizer, but it does not form coordination compounds, and is easily reduced to chromium trioxide. /Hexavalent chromium/|For more Other Experimental Properties (Complete) data for CHROMIC TRIOXIDE (8 total), please visit the HSDB record page.

Deliquescent. Water soluble, giving acidic solutions.

Anhydrides

Strong Oxidizing Agent

CHROMIUM TRIOXIDE is a powerful oxidizing agent. Can react violently upon contact with reducing reagents, including organic matter, leading to ignition or explosion. Dangerously reactive with acetone, alcohols, alkali metals (sodium, potassium), ammonia, arsenic, dimethylformamide, hydrogen sulfide, phosphorus, peroxyformic acid, pyridine, selenium, sulfur, and many other chemicals [Sax, 9th ed., 1996, p. 852]. Noncombustible but can accelerate the burning of combustible materials. Sufficient heat may be generated from the reaction with combustible materials to ignite the mass. Aqueous solutions corrode many metals rapidly. Often mixed with sulfuric acid to make "cleaning solution" for glass. Used cleaning solution in closed bottles may explode due to the build up of gaseous carbon dioxide arising from oxidation of organic impurities [Bryson, W. R., Chem. Brit., 1975, 11, p. 377].

May ignite organic materials on contact. (USCG, 1999)

CrO3: Noncombustible Solid, but will accelerate the burning of combustible materials.