Hazard classDanger — Oxidiser, Health hazard, Toxic, Corrosive, Environmental hazard
PictogramsOxidiserHealth hazardToxicCorrosiveEnvironmental hazard
H-statements- H271 May cause fire or explosion; strong oxidiser
- H350 May cause cancer
- H340 May cause genetic defects
- H361f Suspected of damaging fertility
- H330 Fatal if inhaled
- H311 Toxic in contact with skin
- H301 Toxic if swallowed
- H372 Causes damage to organs through prolonged or repeated exposure
- H314 Causes severe skin burns and eye damage
- H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled
- H317 May cause an allergic skin reaction
- H400 Very toxic to aquatic life
- H410 Very toxic to aquatic life with long lasting effects
Common uses (US EPA CDR)CatalystAdhesion/cohesion promoterPlating agentIntermediateCorrosion inhibitorSurface modifier
Workplace exposure limitsNIOSH REL (as Cr): Ca TWA 0.001 mg/m3
OSHA PEL (as CrO3): TWA 0.005 mg/m3
IDLH (CrO3) GB6650000 (CrO3) {as Cr(VI)}]Occupational exposure limits — NIOSH Pocket Guide.
SynonymsChromium trioxide · trioxochromium · Chromic anhydride · Chromium(VI) oxide · CrO3 · Chromtrioxid · Monochromium trioxide · CHROMIC TRIOXIDE
Molecular weight99.994 g/mol
Data sourceHarmonised classification ECHA — EU CLP Annex VILegally binding EU classification adopted by ECHA under CLP Annex VI — the highest-confidence GHS source.