ABC of Safety in the Biological Sciences
POTASSIUM THIOCYANATE (KCNS)
SYNONYMS
Potassium sulphocyanide, potassium rhodanide.
GENERAL PRECAUTIONS
Avoid skin and eye contact.
Avoid ingestion.
Keep away from oxidising agents.
Keep away from moisture.
Keep the container tightly closed.
Keep in the dark.
Wash hands thoroughly after handling.
CHARACTERISTICS
Colourless or white deliquescent crystals.
HEALTH HAZARD DATA
Potassium thiocyanate is a skin and eye irritant and is toxic
when ingested. Eye contact will cause redness and pain. Skin
contact will cause localised irritation. Ingestion will cause
headache, nausea, vomiting, dizziness and faintness.
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). 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
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 develops seek medical
attention.
Ingestion wash out the mouth thoroughly with water and give
water to drink. Seek immediate medical attention.
INCOMPATIBILITY
Decomposes when exposed to light. Reacts violently with
oxidising agents.
STORAGE
Keep the container tightly closed and store in the dark in a
cool, dry atmosphere.
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.
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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