Chromous chloride

  • Chromium(II) chloride
  • Chromium dichloride
Formula
CrCl2
Structure
Description
A white crystalline solid.
Uses
In chromizing, in preparation of chromium metal, in catalysts for organic reactions, as oxygen absorbent, in analysis.

Registry Numbers and Inventories.
CAS
10049-05-5
EC (EINECS/ELINCS)
233-163-3
EC Class
harmful
RTECS
GB5250000
RTECS class
Mutagen
UN (DOT)
9102
Merck
13,2264
Beilstein/Gmelin
9299 (G)
RCRA
D007
Swiss Giftliste 1
G-4724
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Cl2Cr
Formula mass
122.90
Melting point, °C
823 - 825
Boiling point, °C
1302
Density
2.87 g/cm3
Solubility in water
Soluble
Heat of fusion
33.8 kJ/mol

Hazards and Protection.
Storage
Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation.
Disposal code
15
Stability
Stable under normal shipping and handling conditions. However, may decompose if exposed to moist air or water. Reported to have exploded when in a sealed container This was most likely due to pressure of hydrogen by reduction of water.
Incompatibilities
Active metals, oxidizing agents.
Decomposition
Hydrogen chloride, irritating and toxic fumes and gases.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Substance is noncombustible. Powerful reducing agent. Extinguishing media: Substance is noncombustible; use agent most appropriate to extinguish surrounding fire.
Fire potential
Non-combustible
Hazards
Some may burn but none ignite readily. May polymerize explosively when heated or involved in a fire. Containers may explode when heated. Some may be transported hot.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
TLV (as Cr): ppm; 0.05 mg/m3 (ACGIH 1993-1994).
Poison_Class
4
Exposure effects
Hepatic encephalopathy, cerebral edema, and coma may occur. Both trivalent and hexavalent chromium have been found to cross the placental barrier in hamsters and mice. Both were shown to enter the fetus during mid to late gestation. Developmental effects caused by both differed between hamster and mice. Fetal uptake of hexavalent chromium was much greater than that of the trivalent form. Effects on placental tissue could have also affected the fetus.
   Ingestion
May cause irritation of the digestive tract. May be harmful if swallowed.
   Inhalation
May cause respiratory tract irritation. May cause ulceration and perforation of the nasal septum if inhaled in excessive quantities.
   Skin
Causes skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
9102
Response guide
Hazard class
9
USCG CHRIS Code
CRC
 
HS Code
2827 39 80
 
Std. Transport #
4962634 4962635