Thallium carbonate

  • Thallous carbonate
  • Dithallium carbonate
Formula
CO3Tl2
Structure
Description
Heavy, shiny, colorless or white crystals.
Uses
Analysis (testing for carbon disulfide).

Registry Numbers and Inventories.
CAS
6533-73-9
EC (EINECS/ELINCS)
229-434-0
RTECS
XG4000000
RTECS class
Mutagen; Reproductive Effector
UN (DOT)
1707
Merck
12,9394
Beilstein/Gmelin
11500 (G)
RCRA
U215
Canada DSL/NDSL
NDSL
US TSCA
Listed
Korea ECL
Listed

Properties.
Formula
CO3Tl2
Formula mass
468.77
Melting point, °C
272
Density
7.06 g/cm3
Solubility in water
Slightly soluble
Heat of fusion
18.42 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear self-contained breathing apparatus when fighting fires with this material. Wear full protective clothing if contact with the material is anticipated; otherwise, boots, protective gloves, and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Ventilate area of spill. For small quantities, sweep onto paper or other suitable material, place in sealed container for disposal. Large quantities may be reclaimed. If this is not practical, collect in most convenient and safe manner and deposit in sealed containers. For liquids absorb in vermiculite, dry sand, earth or similar material and place in sealed containers for disposal.
Stability
No data.
Incompatibilities
Incompatible with strong oxidizing agents and strong acids.
Decomposition
May decompose on exposure to moist air or water. When heated to decomposition, emits toxic fumes of thallium.

Fire.
Fire fighting
(Non-Specific -- Thallium Salts, n.o.s.) Move container from fire area if you can do so without risk. Wear self-contained (positive pressure if available) breathing apparatus and full protective clothing.(Non-Specific -- Thallium Salts, n.o.s.) Extinguish with dry chemicals, carbon dioxide, water spray, fog, or foam.
Fire potential
Non-Combustible
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
NIOSH REL: TWA 0.1 mg/m3 [skin] OSHA PEL: TWA 0.1 mg/m3 [skin] IDLH 15 mg/m3 (as Tl)
Exposure effects
Elevated blood pressure may be seen. Symptoms during the first days may include paresthesias, myalgias, peripheral burning sensation, headache, cranial nerve damage, convulsions, delirium, and coma. Peripheral neuropathy, severe pain, and muscle weakness with atrophy is also common. Ataxia, choreiform movements, dementia, depression, and psychosis may develop later in the course. Neurological damage is slow to resolve and may be permanent. Thallous carbonate was embryotoxic via the male in rats. Thallium crosses the placenta and concentrates in the testes.
   Ingestion
Gastrointestinal symptoms may include anorexia, excessive salivation, diarrhea, stomatitis, paroxysmal abdominal pain, vomiting, and gi hemorrhage.
   Inhalation
Death may be due to respiratory arrest or pneumonia. Adult respiratory distress syndrome (ards) has been seen.
   Skin
Diaphoresis and dry scaly skin eruptions may develop. Black pigmentation of the hair root becomes apparent within four days. Alopecia (including the eyebrows) develops within one to three weeks. Mee's lines appear after two to four weeks.
   Eyes
Hair loss may be seen in one to three weeks. Decreased visual acuity and color vision, together with ophthalmoplegia and optic neuritis, are common. A bluish line may appear in the gums after three or four weeks, and dental caries are increased.

First aid
 
   Ingestion
Do not induce emesis. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove and isolate contaminated clothing and shoes. Remove material from skin immediately. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
1707
Response guide
Hazard class
6.1
Packing Group
II
 
USCG CHRIS Code
THB