ABC of Safety in the Biological Sciences
SILVER NITRATE (AgNO3)
SYNONYMS
None known.
GENERAL PRECAUTIONS
Use a fume hood.
Avoid skin and eye contact.
Avoid inhalation or ingestion of the powder.
Keep away from heat.
Keep away from combustible substances.
Keep in the dark.
Keep the lid tightly sealed.
Wash hands thoroughly after handling.
CHARACTERISTICS
Colourless, transparent crystals or white crystalline powder,
odourless. Darkens on exposure to organic matter and light.
HEALTH HAZARD DATA
This substance is a strong oxidising agent and may cause a fire
if in contact with a combustible material. It is a caustic
substance and can cause burns and very toxic if ingested, the
silver being absorbed into the blood stream followed by
deposition in a variety of body tissues. It is a severe eye
irritant.
TREATMENTS
Skin remove contaminated clothing and immediately wash the
affected area with large amounts of water until all evidence of
the chemical has been removed (approximately 15 minutes). If
irritation persists or burns develop 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
immediate medical attention.
Inhalation remove from the area of exposure to fresh air. Keep
warm and allow to rest. If discomfort persists seek medical
attention.
Ingestion wash out the mouth thoroughly with water and give
plenty of water to drink. Seek immediate medical advice.
INCOMPATIBILITY
Heating produces toxic oxides of nitrogen. Silver nitrate can
form explosive products with ethanol. Causes ignition or
explosion if mixed with charcoal, magnesium, phosphorus or
sulphur. Ammoniacal solutions can precipitate highly explosive
silver in the presence of alkali or glucose. Silver nitrate
darkens in the presence of organic material on exposure to
light.
STORAGE
Keep away from combustible material and store in a tightly
sealed container, in the dark, in a cool, dry atmosphere away.
HANDLING
Use a fume hood that will keep the level of exposure below the
recommended threshold limit, ie. 0.01 mg/m3. If
exposure is expected to exceed this limit then a respirator is
recommended. Wear protective clothing. A long sleeved laboratory
coat or gown, rubber gloves, safety goggles and a face mask as a
minimum standard.
DISPOSAL
The elements and their compounds should be dealt with
separately. Special instructions should be sought from the
supplier.
ENVIRONMENT:
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