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| CAS No.: | 7791-12-0 |
|---|---|
| Name: | THALLIUM(I) CHLORIDE |
| Article Data: | 216 |
| Molecular Structure: | |
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|
|
| Formula: | ClTl |
| Molecular Weight: | 239.836 |
| Synonyms: | Thalliumchloride; Thallium monochloride; Thallium(1+) chloride; Thallium(I) chloride;Thallous chloride |
| EINECS: | 232-241-4 |
| Density: | 7 g/mL at 25 °C(lit.) |
| Melting Point: | 430 °C(lit.) |
| Boiling Point: | 720 °C |
| Solubility: | insoluble in water |
| Appearance: | white, odorless crystalline |
| Hazard Symbols: | As for thallium. |
| Risk Codes: | 26/28-33-51/53 |
| Safety: | Poison by ingestion and intraperitoneal routes. An experimental teratogen. Mutation data reported. Incompatible with F2. When heated to decomposition it emits very toxic fumes of Cl− and Tl. See also THALLIUM COMPOUNDS and CHLORIDES. |
| Transport Information: | UN 1707 6 |
| PSA: | 0.00000 |
| LogP: | 0.68950 |
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Chemistry
IUPAC Name: Chlorothallium
The MF of Thallium(I) chloride (CAS NO.7791-12-0) is ClTl.
The MW of Thallium(I) chloride (CAS NO.7791-12-0) is 239.84.
Synonyms of Thallium(I) chloride (CAS NO.7791-12-0): Chloridothallium ; Thalium(I) chloride ; Thallium chloride (TlCl) ; Thallium chloride (VAN)
Product Categories: Inorganics
Apperance: white to off-white powder
Melting Point: 430 °C
Boiling Point: 720 °C
Density: 7 g/mL at 25 °C
Refractive index: 2.247
Storage temp: Poison room
Sensitive: Air Sensitive
Merck: 14,9260
EINECS: 232-241-4
Uses
Thallium(I) chloride (CAS NO.7791-12-0) is used as a catalyst in chlorinations and in suntan lamps.The low solubility of TlCl is exploited in chemical synthesis: treatment of metal chloride complexes with TlPF6, gives the corresponding metal hexafluorophosphate derivative. The resulting TlCl precipitate is separated by filtration of the reaction mixture. The overall methodology is similar to the use of AgPF6, except that Tl+ is non-oxidizing.
Toxicity Data With Reference
| 1. | otr-ham:emb 100 µmol/L | CNREA8 Cancer Research. 39 (1979),193. | ||
| 2. | orl-mus LD50:24 mg/kg | HYSAAV Hygiene and Sanitation: English Translation of Gigiena Sanitariya. 29 (1964),26. | ||
| 3. | ipr-mus LD50:28 mg/kg | COREAF Comptes Rendus Hebdomadaires des Seances de l’Academie des Sciences. 256 (1963),1043. |
Consensus Reports
EPA Extremely Hazardous Substances List. Thallium and its compounds are on the Community Right-To-Know List. EPA Genetic Toxicology Program. Reported in EPA TSCA Inventory.
Safety Profile
Poison by ingestion and intraperitoneal routes. An experimental teratogen. Mutation data reported. Incompatible with F2. When heated to decomposition it emits very toxic fumes of Cl− and Tl. See also THALLIUM COMPOUNDS and CHLORIDES.Safety information of Thallium(I) chloride (CAS NO.7791-12-0):
Hazard Codes 
T+,
N
Risk Statements
26/28 Very Toxic by inhalation and if swallowed
33 Danger of cumulative effects
51/53 Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment
Safety Statements
13 Keep away from food, drink and animal feeding stuffs
28 After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer)
45 In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
61 Avoid release to the environment. Refer to special instructions safety data sheet
RIDADR UN 1707 6.1/PG 2
WGK Germany 3
RTECS XG4200000
HazardClass 6.1
PackingGroup II
Standards and Recommendations
OSHA PEL: TWA 0.1 mg(Tl)/m3 (skin)
ACGIH TLV: TWA 0.1 mg(Tl)/m3 (skin)
Specification
Thallium(I) chloride is the chemical compound with the formula TlCl. This colourless solid is an intermediate in the isolation of thallium from its ores. Typically, a sulfuric acid solution of thallium(I) is treated with HCl to precipitate insoluble TlCl. This solid crystallizes in the caesium chloride motif.The crystalline structure is of cubic CsCl type at room temperature, but it lowers to the orthorombic thallium iodide type upon cooling, the transition temperature being likely affected by the impurities.
A very rare mineral lafossaite, Tl(Cl,Br), is a natural form of thallium (I) chloride