Chromyl chloride

Chromyl chloride
Wireframe model of chromyl chloride
Wireframe model of chromyl chloride
Ball and stick model of chromyl chloride
Ball and stick model of chromyl chloride
Chromyl chloride in vial
Names
Preferred IUPAC name
Chromium(VI) dichloride dioxide
Systematic IUPAC name
Dichloridodioxidochromium
Other names
Chromic acid chloride

Chromium oxychloride

Etard Reagent
Chlorochromic anhydride
Chromic oxychloride
Chromium chloride oxide
Chromium dioxide dichloride
Chromium dioxychloride
Chromium oxychloride
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.035.491 Edit this at Wikidata
EC Number
  • 239-056-8
2231
RTECS number
  • GB5775000
UNII
UN number 1758
  • InChI=1S/2ClH.Cr.2O/h2*1H;;;/q;;+2;;/p-2 checkY
    Key: AHXGRMIPHCAXFP-UHFFFAOYSA-L checkY
  • InChI=1S/2ClH.Cr.2O/h2*1H;;;/q;;+2;;/p-2
    Key: AHXGRMIPHCAXFP-UHFFFAOYSA-L
  • InChI=1/2ClH.Cr.2O/h2*1H;;;/q;;+2;;/p-2/rCl2CrO2/c1-3(2,4)5
    Key: AHXGRMIPHCAXFP-GRYJOLFGAD
  • Cl[Cr](Cl)(=O)=O
Properties
CrO2Cl2
Molar mass 154.9008 g/mol
Appearance Blood-red fuming liquid, similar to bromine
Odor Musty, burning, acrid[1]
Density 1.911 g/mL, liquid
Melting point −96.5 °C (−141.7 °F; 176.7 K)
Boiling point 118.5 °C (245.3 °F; 391.6 K)
Reacts with water
Vapor pressure 20 mmHg (20 °C)[1]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Toxic, oxidizer, carcinogenic, mutagenic, reacts violently with water[1]
GHS labelling:
GHS03: OxidizingGHS05: CorrosiveGHS07: Exclamation markGHS08: Health hazardGHS09: Environmental hazard
Danger
H271, H314, H317, H340, H350, H410
P201, P210, P280, P303+P361+P353, P305+P351+P338+P310, P308+P313[2]
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazard W+OX: Reacts with water in an unusual or dangerous manner AND is oxidizer
3
0
2
W
OX
Flash point noncombustible[1]
NIOSH (US health exposure limits):
PEL (Permissible)
 none[1]
REL (Recommended)
 Ca TWA 0.001 mg Cr(VI)/m3[1]
IDLH (Immediate danger)
 N.D.[1]
Safety data sheet (SDS) Sigma Aldrich - Chromyl Chloride
Related compounds
Related compounds
 Sulfuryl chloride
Vanadium oxytrichloride
MoO2Cl2
Tungsten dichloride dioxide
Chromyl fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chromyl chloride is an inorganic compound with the formula CrO2Cl2. It is a reddish brown compound that is a volatile liquid at room temperature, which is unusual for transition metal compounds. It is the dichloride of chromic acid.

  1. ^ a b c d e f g NIOSH Pocket Guide to Chemical Hazards. "#0142". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ "Chromyl chloride 200042" (PDF). Sigma-Aldrich. Archived from the original on 2020-09-01.