Thallium sulfate

  • Thallous sulfate
  • Eccothal
  • Thallium(I) sulfate
  • Dithallium sulfate
Formula
Tl2SO4
Structure
Description
Odorless white rhomboid prisms or a dense white powder.
Uses
Rodenticide, insecticide bait ingredient, mammal control agent former use.

Registry Numbers and Inventories.
CAS
7446-18-6
EC (EINECS/ELINCS)
231-201-3
EC Index Number
081-003-00-4
EC Class
Very toxic; Toxic; Irritant; Dangerous for the Environment
RTECS
XG6800000
RTECS class
Agricultural Chemical and Pesticide; Reproductive Effector; Human Data
UN (DOT)
1707
Merck
12,9405
Beilstein/Gmelin
13047 (G)
RCRA
P115
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
O4STl2
Formula mass
504.82
Melting point, °C
632
Density
6.77 g/cm3
Solubility in water
48.7 g/L
Heat of fusion
23.0 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Store in a tightly closed container. Poison room locked.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Do not get in eyes, on skin, or on clothing. Do not ingest or inhale. Wash clothing before reuse. Discard contaminated shoes.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Oxides of sulfur, thallium fumes.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or regular foam.
Fire potential
Nonflammable solid.
Hazards
When heated to decomposition, it emits very toxic fumes of thallium and sulfur oxide.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
TLV (as Tl): ppm; 0.1 mg/m3 (as TWA) (skin) (ACGIH 1992-1993).
Exposure effects
May cause reproductive and fetal effects.
   Ingestion
May be fatal if swallowed. May cause liver and kidney damage. May cause alopecia (loss of hair). Large doses of thallium may produce hypotension and bradycardia.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

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