ABC of Safety in the Biological Sciences - Sodium Dihydrogen Orthophosphate

 

ABC of Safety in the Biological Sciences

 


 

SODIUM DIHYDROGEN ORTHOPHOSPHATE (NaH2PO4.2H2O)

SYNONYMS
Sodium biphosphate, sodium phosphate, monobasic.
GENERAL PRECAUTIONS
Avoid eye contact.
Avoid inhalation or ingestion of the powder.
Wash hands thoroughly after handling.
CHARACTERISTICS
Colourless crystals or crystalline powder.
HEALTH HAZARD DATA
This substance is an eye and respiratory tract irritant. There is only slight toxicity if ingested, however if large amounts are ingested then it may cause metabolic disturbances.
TREATMENTS
Skin ­ 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).
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 persists seek medical attention.
Inhalation ­ remove from the area of exposure to fresh air. Keep warm and allow to rest. If irritation persists seek medical attention.
Ingestion ­ wash out the mouth thoroughly with water and give water to drink. Seek immediate medical advice.
INCOMPATIBILITY
None known.
STORAGE
Store in a cool, dry atmosphere.
HANDLING
Wear protective clothing to avoid eye contact and inhalation. A long sleeved laboratory coat or gown, rubber gloves, safety goggles and a face mask as a minimum standard.
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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