Name | Thallous iodide |
Synonyms | Thallous iodide THALLOUS IODIDE Thallium(I) iodide THALLIUM(I) IODIDE thallium(1+) iodide THALLIUM (I) IODIDIE THALLIUM (OUS) IODIDE Thallium iodide (thallous) thallium(i) iodide, ultra dry thallium(i) iodide, puratronic |
CAS | 7790-30-9 |
EINECS | 232-199-7 |
InChI | InChI=1/HI.Tl/h1H;/q;+1/p-1 |
Molecular Formula | ITl |
Molar Mass | 331.29 |
Density | 7.29g/mLat 25°C(lit.) |
Melting Point | 440°C(lit.) |
Boling Point | 823°C |
Flash Point | 824°C |
Water Solubility | Practically insoluble in water |
Vapor Presure | 13.8mmHg at 25°C |
Appearance | Powder |
Specific Gravity | 7.09 |
Color | Yellow |
Exposure Limit | ACGIH: TWA 0.02 mg/m3 (Skin) |
Solubility Product Constant(Ksp) | pKsp: 7.26 |
Merck | 14,9264 |
Sensitive | Light Sensitive |
Use | Combination with thallium bromide for the labeling of infrared radiation |
Risk Codes | R26/28 - Very toxic by inhalation and if swallowed. R33 - Danger of cumulative effects R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
Safety Description | S13 - Keep away from food, drink and animal foodstuffs. S28 - After contact with skin, wash immediately with plenty of soap-suds. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
UN IDs | UN 1707 6.1/PG 2 |
WGK Germany | 3 |
RTECS | XG5425000 |
TSCA | Yes |
Hazard Class | 6.1 |
Packing Group | II |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
preparation | T1I, also known as thallium iodide (I), can be prepared by direct reaction between thallium and iodine, in general, however, a thallium salt (sulfate, perchlorate) is added to an aqueous solution of potassium iodide or hydroiodic acid to precipitate it, washed with water, and then dried at 110 °c. Thallium iodide has two isomeric forms which are reversible at 175 °c or 4.7GPa. The high temperature type is an equiaxed crystal system with a cesium chloride-type body-centered cubic lattice, called a beta-T1i quasi-stable phase, which is red. The low temperature type α-T1I is an orthorhombic crystal system, which is yellow. Fluorescence by the action of X-rays or light. At 160GPa or more, the metal conductivity is exhibited. Although it is stable in dilute hydrochloric acid and dilute sulfuric acid, it reacts with nitric acid to produce iodine and thallium nitrate. |
solubility in water (g/100ml) | grams dissolved per 100ml of water at different temperatures (℃): 2 × 10-3/30 ℃;6 × 10-3/20 ℃;1.5 × 10-2/40 ℃; 3.5 × 10-2/60 ℃;7 × 10-2/80 ℃;0.12g/100 ℃ |
Use | mixed with thallium bromide for infrared radiation transmission code |
category | toxic substances |
toxicity grade | highly toxic |
Acute toxicity | oral-rat LDL0: 55 mg/kg; Oral-mouse LDL0: 28 mg/kg |
flammability hazard characteristics | nonflammable substances; toxic iodide and thallium-containing fumes from heat |
storage and transportation characteristics | The warehouse is ventilated and dried at low temperature, separate storage of food additives |
Occupational Standard | TLA-TWA 0.1 mg (thallium)/m3 |