???? ?????
|
|
???? ????? ??
- ???
- 1200 °C
- ?? ?
- 1400 °C
- ??
- 4.46 g/mL at 25 °C
- ???
- soluble in acid solutions
- ??? ??
- ??
- Specific Gravity
- 4.46
- ??
- ???
- ???
- ?, ???, ???? ?????.
- ??
- Hygroscopic
- Crystal Structure
- Rutile type
- crystal system
- square
- Merck
- 14,2440
- Space group
- P42/mnm
- Lattice constant
a/nm b/nm c/nm α/o β/o γ/o V/nm3 0.4695 0.4695 0.3182 90 90 90 0.0701
- ?? ??
- ACGIH: TWA 0.02 mg/m3; TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3
- ???
- ???
- CAS ??????
- 10026-17-2(CAS DataBase Reference)
??
- ?? ? ?? ??
- ?? ? ???? ?? (GHS)
| ??? ?? | T,C | ||
|---|---|---|---|
| ?? ???? ?? | 25-34 | ||
| ????? | 26-36/37/39-45-50A-28A | ||
| ????(UN No.) | UN 2923 8/PG 3 | ||
| WGK ?? | 3 | ||
| RTECS ?? | GG0770000 | ||
| F ?????? | 21 | ||
| ?? ?? ?? | Toxic | ||
| TSCA | Yes | ||
| ?? ?? | 6.1 | ||
| ???? | III | ||
| HS ?? | 28261990 | ||
| ?? ?? ??? | 10026-17-2(Hazardous Substances Data) | ||
| ???? ?? | KE-06097 |
???? ????? C??? ??, ??, ??
??? ??
Rose-red crystals or powder. Soluble in cold water and hydrofluoric acid. Decomposes in hot water. Ammine complexes can be prepared from the hydrate.??? ??
Red tetragonal crystal; density 4.46 g/cm3; melts at 1,127°C; vaporizes around 1,400°C; sparingly soluble in water; soluble in warm mineral acids; decomposes in boiling water. Tetrahydrate is red orthogonal crystal; density 2.22 g/cm3; decomposes on heating; soluble in water; di- and trihydrates are soluble in water.??
Cobalt(II) fluoride can be used as a catalyst to alloy metals. It is also used for optical deposition, of which it tremendously improves optical quality. The compound may be used in dental care.?? ??
Violet to red solid. Sinks and mixes slowly with water.?? ???
Cobalt(II) fluoride is a toxic, light brown crystalline material, when exposed to water Cobalt(II) fluoride forms highly corrosive hydrofluoric acid. When heated to decomposition Cobalt(II) fluoride emits toxic fumes of metallic cobalt and fluorides [Lewis, 3rd ed., 1993, p. 344].???
Highly toxic.????
INHALATION: Inhalation of dust may cause pulmonary symptoms. EYES: Irritation. SKIN: Skin rashes, dermatitis. INGESTION: Nausea and vomiting caused by local irritation.LD50 oral (rat): 150 mg/kg
Safety Profile
Poison by ingestion. When heated to decomposition it emits toxic fumes of Co and F-.???? ????? ?? ?? ? ???
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???( 118)?? ??
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