- Thallous oxide
Black crystalline powder, hygroscopic, odorless.
Substance is used in production of glass and artificial gems.
Registry Numbers and Inventories.
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
Solubility in water
Hazards and Protection.
Keep container closed, thallium compounds are extremely poisonous, avoid all contact.
Neoprene or nitrile protective gloves. Approved non-vented safety goggles. Protective clothing to prevent skin contact or clothing contamination.
NIOSH approved full face respirator with high efficiency filters.
Isolate area, wear appropriate protective equipment. Carefully scoop up material, vacuum powder using HEPA filter, avoid raising dust. Thoroughly clean spill area.
Stable at normal temperatures and pressures.
Toxic thallium fumes.
Use extinguishing media suitable for surrounding materials and type of fire. Firefighters must wear full face, self-contained breathing apparatus with full protective clothing to prevent contact with skin and eyes. Fumes from fire are hazardous. Isolate runoff to prevent environmental pollution.
May emit toxic metal oxide fume.
OSHA PEL 0.1 mg/m3
The main symptoms of thallium poisoning are peripheral neuropathy and loss of hair. Acute poisoning causes paresthesios, ataxia, alopecia, fever, coryza, abdominal pain, nausea, and vomiting. Symptoms may progress to lethargy, speech disorders, tremors, convulsions, cyanosis, pulmonary edema, bronchopneumonia and death. Kidney, liver and brain damage can occur. Thallium poisoning during the first trimester of pregnancy can cause skeletal deformities, alopecia, low birth weight and premature birth. Chronic thallium poisoning may produce alopecia, salivation and a blue line on the gums. Damage to the gastrointestinal, endocrine system and kidneys may also occur.
Ingestion of thallium compounds can cause fatigue, limb and joint pain, discoloration of and loss of hair, peripheral neuritis, diarrhea, vomiting, severe pain in the calves of legs, albuminuria, eosinophilia, lymphocytosis and optic neuritis followed by atrophy.
Inhalation of thallium will cause irritation of mucous membranes and the respiratory tract. Can cause pulmonary edema.
Strong skin irritant. Skin contact may cause dermatitis on first contact. Thallium compounds can be absorbed through the skin.
trong eye irritant.
Do not induce vomiting. Seek immediate, competent medical attention.
Remove victim to fresh air, keep warm and quiet, administer oxygen if required, get immediate medical attention.
Brush off material, wash affected area thoroughly with soap and water, and wash contaminated clothing before reuse.
Flush with copious amounts of water, including under eyelids, for at least 15 minutes. Seek medical attention.