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Chemical Datasheet

CHROMOUS CHLORIDE

Chemical Identifiers

CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code
  • 10049-05-5
 none data unavailable
  • CRC
NIOSH Pocket Guide International Chem Safety Card
Chromium(II) compounds (as Cr)
  • CHROMOUS CHLORIDE
NFPA 704
data unavailable
General Description
A white crystalline solid. The primary hazard is the threat to the environment. Immediate steps must be taken to prevent its spread to the environment. It is used to make other chemicals and as an oxygen absorbent.

Hazards

Reactivity Alerts
Air & Water Reactions
Stable in dry air, but oxidizes rapidly in moist air or standing water with liberation of Hydrogen, [Merck, 11th ed., 1989]. Soluble in water.
Fire Hazard
No information available.
Health Hazard
DUST: Harmful if inhaled. SOLID: Irritating to skin and eyes. Harmful if swallowed. (USCG, 1999)
Reactivity Profile
Inorganic reducing agents, such as CHROMOUS CHLORIDE, react with oxidizing agents to generate heat and products that may be flammable, combustible, or otherwise reactive. Their reactions with oxidizing agents may be violent. Long storage of a chromous chloride solution culminated in an explosion. This was ascribed to the slow buildup of hydrogen gas that was produced by reduction of water by the Cr(II) ion [MCA Case History No. 1660].
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents

No information available.

Response Recommendations

Isolation and Evacuation
No information available.
Firefighting
No information available.
Non-Fire Response
No information available.
Protective Clothing
Wear goggles, self-contained breathing apparatus, and rubber gloves. (USCG, 1999)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
Call a physician.

INHALATION: Move to fresh air.

EYES: Flush with copious amounts of water.

SKIN: Wash with soap and plenty of water.

INGESTION: If conscious, make victim drink water or milk, then induce vomiting. (USCG, 1999)

Physical Properties

Chemical Formula:
  • Cl2Cr
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point: 1515°F (USCG, 1999)
Vapor Pressure: data unavailable
Vapor Density (Relative to Air): data unavailable
Specific Gravity: 2.751 at 57.2°F (USCG, 1999) - Denser than water; will sink
Boiling Point: data unavailable
Molecular Weight: 122.92 (USCG, 1999)
Water Solubility: data unavailable
Ionization Energy/Potential: data unavailable
IDLH: 250 mg Cr(II)/m3 (NIOSH, 2023)

AEGLs (Acute Exposure Guideline Levels)

No AEGL information available.

ERPGs (Emergency Response Planning Guidelines)

No ERPG information available.

PACs (Protective Action Criteria)

Chemical PAC-1 PAC-2 PAC-3
Chromous chloride; (Chromium(II) chloride (1:2)) (10049-05-5) 3.5 mg/m3 62 mg/m3 370 mg/m3
(DOE, 2018)

Regulatory Information

EPA Consolidated List of Lists

Regulatory Name CAS Number/
313 Category Code		 EPCRA 302
EHS TPQ		 EPCRA 304
EHS RQ		 CERCLA RQ EPCRA 313
TRI		 RCRA
Code		 CAA 112(r)
RMP TQ
Chromium Compounds N090 & 313
Chromous chloride 10049-05-5 1000 pounds 313c

(EPA List of Lists, 2022)

CISA Chemical Facility Anti-Terrorism Standards (CFATS)

No regulatory information available.

OSHA Process Safety Management (PSM) Standard List

No regulatory information available.

Alternate Chemical Names