ABC of Safety in the Biological Sciences
POTASSIUM DIHYDROGEN ORTHOPHOSPHATE (KH2PO4)
Potassium phosphate, monobasic; potassium biphosphate, monobasic.
Avoid contact with eyes and skin.
Wash hands well after use.
Colourless, odourless crystals.
HEALTH HAZARD DATA
Moderately toxic. LD 50 = 0.55 g/kg orally. Target organs are heart and kidneys. Overexposure results in fall in blood pressure, gastroenteritis and renal tubular necrosis. Is an irritant to eyes, skin and respiratory tract.
Skin remove contaminated clothing and wash affected area with soap or mild detergent and large amounts of water until all evidence of the chemical has been removed (15 minutes). If sensitisation occurs 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 persists seek medical advice.
Ingestion if victim is conscious and convulsions not present induce vomiting by sticking finger down throat. Seek medical advice.
Inhalation remove to fresh air. If breathing has ceased apply artificial respiration. Seek medical attention.
Wear protective clothing. A long sleeved laboratory coat or gown, rubber gloves and safety glasses as a minimum standard.
Rubber gloves, safety glasses and laboratory coat.
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.
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.