Mercuric iodide , ACS , 7774-29-0
Synonym(s):
Mercuric iodide red;Mercury diiodide;Mercury(II) iodide;Mercury(II) iodide red
CAS NO.：7774-29-0
Empirical Formula: HgI2
Molecular Weight: 454.4
MDL number: MFCD00011044
EINECS: 231-873-8
PRODUCT Properties
| Melting point: | 259 °C(lit.) |
| Boiling point: | 354 °C(lit.) |
| Density | 6.36 |
| vapor pressure | 0.006 hPa (80 °C) |
| Flash point: | 350°C subl. |
| storage temp. | Store at RT. |
| solubility | potassium iodide solution: passes test |
| form | beads |
| Specific Gravity | 6.271 |
| color | White |
| PH | 6-7 (50g/l, H2O, 20℃)(slurry) |
| Odor | Odorless |
| Water Solubility | Insoluble inwater. Slightly soluble in alcohol, ether, acetone, chloroform, ethyl acetate, olive oil and castor oil. |
| Sensitive | Light Sensitive |
| Merck | 14,5879 |
| Solubility Product Constant (Ksp) | pKsp: 28.54 |
| Exposure limits | ACGIH: TWA 0.025 mg/m3; TWA 0.01 ppm (Skin) NIOSH: IDLH 10 mg/m3; TWA 0.05 mg/m3; Ceiling 0.1 mg/m3 |
| Stability: | Stable. Incompatible with strong oxidizing agents, potassium, sodium, interhalogens. Light-sensitive. |
| CAS DataBase Reference | 7774-29-0(CAS DataBase Reference) |
| EPA Substance Registry System | Mercuric iodide (7774-29-0) |
Description and Uses
Mercuric iodide is a heavy, scarlet red, odorless, crystalline solid. It may be shipped as a red solution. It turns to a yellow powder at 127℃ and red upon cooling. Molecular weight= 454.40;Boiling point=(sublimes) 354℃; Freezing/Melting point=259℃. Hazard Identification (based on NFPA-704 M Rating System): Health 3, Flammability 0, Reactivity 0. Slightly soluble in water.
Mercury(II) iodide is is used for preparation of Nessler's reagent, used for detection of presence of ammonia. It is a semiconductor material, used in some x-ray and gamma ray detection and imaging devices operating at room temperatures. In veterinary medicine, it is used in blister ointments in exostoses, bursal enlargement, etc.
Safety
| Symbol(GHS) |    GHS06,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H300+H310+H330-H373-H410 |
| Precautionary statements | P262-P273-P280-P301+P310+P330-P302+P352+P310-P304+P340+P310 |
| Hazard Codes | T+,N |
| Risk Statements | 26/27/28-33-50/53 |
| Safety Statements | 13-28-45-60-61 |
| RIDADR | UN 2025 6.1/PG 2 |
| WGK Germany | 3 |
| RTECS | OW5250000 |
| F | 8 |
| TSCA | Yes |
| HazardClass | 6.1 |
| PackingGroup | II |
| HS Code | 28521000 |
| Hazardous Substances Data | 7774-29-0(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 18 mg/kg LD50 dermal Rat 75 mg/kg |
