Iodine , CP,99.5% , 7553-56-2
CAS NO.：7553-56-2
Empirical Formula: I2
Molecular Weight: 253.81
MDL number: MFCD00011355
EINECS: 231-442-4
PRODUCT Properties
| Melting point: | 113 °C (lit.) |
| Boiling point: | 184 °C (lit.) |
| Density | 1.32 g/mL at 25 °C |
| vapor density | 9 (vs air) |
| vapor pressure | 0.31 mm Hg ( 25 °C) |
| Flash point: | <10℃ |
| storage temp. | Store at RT. |
| solubility | Miscible with chloroform, carbon tetrachloride, carbon disulfide, cyclohexane, methanol, ethyl acetate, toluene, benzene, n-hexane, butan-2-ol, bromoethane, n-heptane, glycerol and diethyl ether. |
| form | particles (round) |
| Specific Gravity | 4.93 |
| color | Red-brown |
| Odor | Sharp, characteristic odor |
| PH | 5.4 (H2O)(saturated solution) |
| Resistivity | 1.3E15 μΩ-cm |
| Water Solubility | 0.3 g/L (20 ºC) |
| Crystal Structure | Rhombic |
| Merck | 14,5014 |
| BRN | 3587194 |
| Exposure limits | Ceiling 0.1 ppm (～1mg/m3) (ACGIH,
MSHA, OSHA, and NIOSH); IDLH 10 ppm
(NIOSH). |
| InChIKey | PNDPGZBMCMUPRI-UHFFFAOYSA-N |
| LogP | 2.49 at 20℃ |
Description and Uses
Iodine was discovered in 1811 by Bernard Courtois, and is classed among the rarer elements. Iodine is found naturally in seaweed, and is considered and generally recognized as safe substance by the US Food and Drug Administration (FDA). Iodine is a required element by many species, including humans. It has been recognized as preventative against goiter since 1819, and is used in iodized salt for this purpose. Iodine is also used as a dough oxidizer in commercial bread making. Iodine is generally extracted from natural and oil field brines by means of oxidation of iodide with chlorine, then removal from solution with an airstream. Iodine is reabsorbed in solution and reduces to hidrotic acid with sulfur dioxide. The solution is then chlorinated to precipitate free iodine, and is further purified by treatment with concentrated sulfuric acid. Iodine is the heaviest essential element for most life, with tungsten being used by some bacteria.
Synthesis of organic chemicals; photographic film; as a disinfectant in drinking water
Safety
| Symbol(GHS) |    GHS07,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H302+H312+H332-H315-H319-H335-H372-H400 |
| Precautionary statements | P273-P280-P301+P312-P302+P352+P312-P304+P340+P312-P314 |
| Hazard Codes | Xn,N,F |
| Risk Statements | 36/37/38-50-20/21-36/38-20/21/22-22-40-19-11-36/37 |
| Safety Statements | 26-61-25-23-36/37-16 |
| OEL | Ceiling: 0.1 ppm (1 mg/m3) |
| RIDADR | UN 2056 3/PG 2 |
| WGK Germany | 2 |
| RTECS | NN1575000 |
| F | 10 |
| TSCA | Yes |
| HS Code | 2801 20 00 |
| HazardClass | 8 |
| PackingGroup | III |
| Toxicity | LD50 oral (rat) 14,000 mg/kg LCLO inhal (rat) 80 ppm (800 mg/m3; 1 h) PEL (OSHA) 0.1 ppm (ceiling, 1 mg/m3) TLV-TWA (ACGIH) 0.1 ppm (ceiling, 1 mg/m3) |
| IDLA | 2 ppm |
