ABC of Safety in the Biological Sciences
THYMOL BLUE (No Colour Index No.) (C27H30O5S)
SYNONYMS
Thynolsulphonphthalein.
GENERAL PRECAUTIONS
Avoid skin and eye contact.
Avoid inhalation or ingestion of the powder.
Wash hands thoroughly after handling.
CHARACTERISTICS
Browngreen powder. Hydroxytriarylmethane group.
HEALTH HAZARD DATA
Thymol blue is an eye, skin and respiratory tract irritant. Its
toxicity has not been quantified. Handle with care.
TREATMENTS
Skin remove contaminated clothing then wash the affected area
with soap or mild detergent and large amounts of water until all
evidence of the dye has been removed (approximately 15 minutes).
If irritation persists seek medical advice. Wash contaminated
clothing before reuse.
Eyes immediately wash the affected eye with large amounts of
water until all evidence of the dye has been removed
(approximately 15 minutes). If irritation persists seek
immediate medical attention.
Inhalation remove from the area of exposure to fresh air. If
breathing has ceased apply artificial respiration. Give oxygen
if required. Keep warm and allow to rest. Seek immediate medical
attention.
Ingestion wash out the mouth thoroughly with water and seek
immediate medical attention.
INCOMPATIBILITY
Heating produces toxic fumes of sulphur compounds.
STORAGE
Store in a cool, dry atmosphere away from heat.
HANDLING
Use a fume hood to keep the level of exposure to a minimum. 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, face shield and laboratory coat. Have an all
purpose canister respirator available.
SPILLS:
A gas leak: keep the concentration of the gas below the
explosive mixture range by forced ventilation. Remove the tank
to an open area and allow dissipation to the atmosphere. Attempt
to cap the valve outlet and return the tank to the supplier.
A liquid: absorb on paper. Evaporate in an iron pan in a flame
proof fume hood then burn the paper.
A solid: sweep on to paper and place in an iron pan in a fume
hood. Burn the paper and compound.
PACKAGE LOTS:
A gas leak: pipe the gas into an incinerator or lower into a pit
and allow to burn.
A liquid: atomise into an incinerator. Combustion may be
improved by mixing with a more flammable solvent.
A solid: make up packages in paper or other flammable material.
Burn in the incinerator. Or the solid may be dissolved in a
flammable solvent and sprayed into a fire chamber.
ENVIRONMENT:
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