ABC of Safety in the Biological Sciences - Chromium Nitrate

 

ABC of Safety in the Biological Sciences

 


 

CHROMIUM (III) NITRATE NONAHYDRATE (Cr(NO3)3.9H2O)

SYNONYMS
Chromic nitrate.
CHARACTERISTICS
Blue to purple crystals. Decomposition yields nitrogen oxides. May be shock sensitive. Always use polyethylene tools.
INCOMPATIBILITY
May explode when heated, also incompatible with organic materials and reducing agents.
HEALTH HAZARD DATA
Is harmful if inhaled or swallowed, an irritant to mucous membranes and upper respiratory tract, eyes and skin, and may cause allergic skin reaction.
HANDLING and GENERAL PRECAUTIONS
Use a fume hood.
Avoid skin and eye contact.
Avoid inhalation or ingestion of the powder.
Keep away from heat or naked flames.
Keep away from combustible substances.
Keep away from reducing agents.
Keep the container tightly sealed.
Wash hands thoroughly after handling.
Use a fume hood to minimise exposure to this substance. Wear protective clothing. A long sleeved laboratory coat or gown, rubber gloves, safety goggles and a face mask as a minimum standard.
TREATMENTS
Skin ­ immediately remove contaminated clothing and wash the affected area with soap or mild detergent and large amounts of water until all evidence of the chemical has been removed (approximately 15 minutes). If hypersensitivity develops seek medical attention. Wash contaminated clothing before re­use.
Eyes ­ immediately wash the affected eye with large amounts of water until all evidence of the chemical has been removed (approximately 15 minutes). If irritation or pain persist seek immediate medical attention.
Inhalation ­ remove from the area of exposure to fresh air. If breathing has ceased apply artificial respiration. Keep warm and allow to rest. If irritation persists or signs of toxicity develop seek medical attention.
Ingestion ­ wash out the mouth thoroughly with water and give water to drink. Do not induce vomiting. Never give anything by mouth to an unconscious person. Seek immediate medical advice.
STORAGE
Store in a cool, dry atmosphere away from heat or ignition sources.
DISPOSAL
WEAR:
Rubber gloves, safety glasses and laboratory coat.
SPILLS:
Solid - collect in a beaker, dissolve in a large amount of water. Add soda ash, mix and neutralise with 6M hydrochloric acid and discharge to sewer with large excess of water.
Solution - cover with soda ash, mix and scoop into a beaker of water. Neutralise with 6M hydrochloric acid and discharge to sewer with a large excess of water. If a spill contains a fluoride, add slaked lime in addition to the above treatment.
PACKAGE LOTS:
Add slowly to a large container of water. Stir in a slight excess of soda ash. If fluoride is present add slaked lime. Let stand for 24 hours. Decant or siphon into another container and neutralise with 6M hydrochloric acid. Discharge to sewer with a large excess of water. The sludge may be added to land fill.
ENVIRONMENT

 


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