Chromyl chloride

  • Chromium oxychloride
Formula
CrO2Cl2
Structure
Description
Dark red liquid. Acrid - pungent odor.

Registry Numbers and Inventories.
CAS
14977-61-8
EC (EINECS/ELINCS)
239-056-8
EC Index Number
024-005-00-2
EC Class
Oxidising; Carcinogenic Category 2; Mutagenic Category 2; Corrosive; Sensitising; Dangerous for the Environment
RTECS
GB5775000
RTECS class
Tumorigen; Mutagen
UN (DOT)
1758
Beilstein/Gmelin
2231 (G)
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
Cl2CrO2
Formula mass
154.90
Melting point, °C
-97 - -96
Boiling point, °C
117
Vapor pressure, mmHg
24 (25 C)
Vapor density (air=1)
5.3
Density
1.91 g/cm3
Surface tension
36.6 erg/cm3 (19 C)
Dipole moment
0.47 D
Dielectric constant
2.6 (20 C)
Heat of fusion
38.5 kJ/mol
Heat of vaporization
34.5 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Do not store near combustible materials. Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Corrosives area. Water free area. Do not store in metal containers. Store protected from light.
Handling
Wash thoroughly after handling. Keep container tightly closed. Avoid contact with clothing and other combustible materials. Do not get on skin or in eyes. Avoid ingestion and inhalation. Use with adequate ventilation. Discard contaminated shoes.
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 minimize contact with skin.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Provide ventilation. Do not expose spill to water. Do not get water inside containers.
Stability
Stable under normal shipping and handling conditions. Stable under normal temperatures and pressures.
Incompatibilities
Ammonia, organic acids, organic bases, sodium azide, urea, metals, phosphorus.
Decomposition
Hydrogen chloride, oxides of sulfur, irritating and toxic fumes and gases, potassium fume.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Strong oxidizer. Contact with combustible materials may cause a fire. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Water Reactive. Material will react with water and may release a flammable and/or toxic gas. Use water with caution and in flooding amounts. Containers may explode in the heat of a fire. Contact with metals may evolve flammable hydrogen gas. Extinguishing media: If water is the only media available, use in flooding amounts. Do NOT get water inside containers. Contact professional fire-fighters immediately. Cool containers with flooding quantities of water until well after fire is out. For small fires, use dry chemical or carbon dioxide.
Fire potential
May burn but not ignite readily. May ignite combustibles (wood, paper, oil, clothing, etc.).
Hazards
Substance will react with water (some violently), releasing corrosive and/or toxic gases.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases. Reaction with water may generate much heat which will increase the concentration of fumes in the air.
Health
3
 
Flammability
0
 
 
Reactivity
2
 

Health.
Exposure limit(s)
0.025 ppm TLV {0.16 mg/m3}
Carcinogin
I-1, N-1, CP65
Exposure effects
   Ingestion
May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns.
   Inhalation
Causes chemical burns to the respiratory tract.
   Skin
Causes skin burns. May cause blistering of the skin.
   Eyes
Causes eye burns. Vapors cause eye irritation.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   Skin
Get medical aid immediately. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
1758
Response guide
Hazard class
8
Packing Group
I
 
USCG CHRIS Code
CMC