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Send EmailCalcium fluoride, Fluorite powder, CalciuM floride, Calcium fluoride white powder, calcium fluoride anhydrous, 7789-75-5
Calcium fluoride
CAS: 7789-75-5
Molecular Formula: CaF2
Names and Identifiers
| Name | Calcium fluoride |
| Synonyms | CALIFp Fluorite powder CalciuM floride Calcium fluoride Calciumfluoride2 CAF1-like protein Calcium Fluoride in china Calciumfluoridewhitepowder Calciumfluorideprecipitated calcium fluoride anhydrous Calciumfluoridepowderednaturalmineral1 calcium fluoride coating quality balzers Calciumfluoridephosphorgrademicronwhitepowder ANTI-CNOT8 (C-TERM) antibody produced in rabbit |
| CAS | 7789-75-5 |
| EINECS | 232-188-7 |
| InChI | InChI=1/FO2/c2-1-3/q-1 |
| InChIKey | WUKWITHWXAAZEY-UHFFFAOYSA-L |
Physico-chemical Properties
| Molecular Formula | CaF2 |
| Molar Mass | 78.07 |
| Density | 3.18 g/mL at 25 °C (lit.) |
| Melting Point | 1402 °C |
| Boling Point | 2500 °C (lit.) |
| Flash Point | 2500°C |
| Water Solubility | 0.015 g. per 100g H20 at room temperature.(INSOLUBLE) |
| Solubility | Slightly soluble in acid; insoluble in acetone. |
| Appearance | White crystalline powder |
| Specific Gravity | 3.18 |
| Color | white |
| Exposure Limit | ACGIH: TWA 2.5 mg/m3NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3 |
| Solubility Product Constant(Ksp) | pKsp: 8.28 |
| Merck | 14,1667 |
| Storage Condition | -20°C |
| Stability | Stable. Calcium fluoride is inert to organic chemicals and many acids, including HF. It will slowly dissolve in nitric acid. |
| Sensitive | Hygroscopic |
| Refractive Index | 1.434 |
| MDL | MFCD00010907 |
| Physical and Chemical Properties |
The property is an equiaxed crystal system, and the crystal is mostly cubic, octahedral or a polymer composed thereof. Colors are mostly yellow, green, blue, purple or white and rose colors. |
| Use | Widely used in chemical industry, metallurgy, glass, enamel and cement and other fields |
Risk and Safety
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection S36 - Wear suitable protective clothing. |
| UN IDs | 3288 |
| WGK Germany | 1 |
| RTECS | EW1760000 |
| TSCA | Yes |
| HS Code | 28261900 |
| Hazard Note | Irritant |
| Toxicity | LD50 i.p. in mice: 2638.27 mg/kg (Stratmann) |
Upstream Downstream Industry
| Raw Materials | Hydrofluoric Acid Calcium acetate |
| Downstream Products | Hydrofluoric Acid Fluorosilicic acid calcium cyanamide Aluminum fluoride |
Nature
white powder or colorless cubic crystal, light when heated. Melting point 1402 °c; Boiling point 2500 °c; Relative density 3. 18; Refractive index 1.434. Practically insoluble in water, 0.0017g/lOOmL water at 25 °c. Soluble in concentrated inorganic acid, and decomposition of hydrogen fluoride. Slightly soluble in dilute inorganic acid.
Preparation Method
for the fluorite deposits discovered in China, most of the mines adopt the underground mining method, or shallow open-pit mining, because the ore bodies are more strongly inclined and vein-shaped, and the extension depth is larger, deep underground mining. The mining method is mainly based on the method of shallow hole shrinkage. See "phosphorite" for the mining process flow ". Select
There are generally two kinds of ore methods, one of the raw ore is selected by hand to produce qualified concentrate, and the other is hand-selected tailings and lean ore. Fluorite was enriched by flotation. The principle flow of beneficiation varies depending on the type of ore, for example, the stone is a fluorite ore, and the principle flow is as follows: one crushing of the raw ore, one grinding of the ore, one rough selection of the ore, repeated grinding of the ore and one fluorite concentrate.
Introduction
Glow when heated. It is soluble in concentrated mineral acid, and decomposes to release hydrogen fluoride, slightly soluble in dilute mineral acid, insoluble in water. Low toxicity, half lethal dose (rat, oral) 2775mg/kg.
Use
is a new type of electric light source material, which can be directly used as fluorescent powder materials such as fluorescent screen and fluorescent lamp. It is also the main material of single crystal for optical instruments such as infrared laser system optical lens and fairing. It can also be used in the manufacture of optical glasses, optical fibers, enamels, pharmaceuticals and as catalysts and metallurgical fluxes for dehydration and dehydrogenation reactions.
Safety
toxic! Mice were injected intraperitoneally with ld5. 2638 mg/kg. Irritating to the eyes and skin. It has a stimulating effect on the mucosa and upper respiratory tract. Ingestion caused Abdominal Pain, may cause death. Store in a cool, ventilated warehouse. Keep away from fire and heat source. Keep the container sealed. Should be stored separately from acids, etc. During handling, the package should be kept intact to prevent leakage.
Reference Information
| solubility in water (g/100ml) | grams dissolved per 100ml of water: 8.575 × 10-3/30 ℃ |
| Application | used as metallurgical flux, dehydration and dehydrogenation catalyst, also used in electronic, instrument Industry for the production of hydrofluoric acid and fluoride, also used in enamel, ceramics and metallurgical flux widely used in chemical industry, metallurgy, glass, enamel and cement and other fields used in the manufacture of optical glass, optical fiber, enamel, medicine. It is also used as a catalyst for dehydration and dehydrogenation reactions. fluorite is the main mineral raw material for the preparation of fluorine and hydrofluoric acid in the chemical industry, and is also the basic raw material for the production of Freon, Fluoropolymer, fluorine-containing fine chemicals and artificial cryolite. It is also widely used in metallurgy, cement, glass and ceramic sectors. Colorless and transparent bulk fluorite crystals can be used as optical fluorite and process fluorite. widely used in chemical industry, metallurgy, glass, enamel and cement and other fields The manufacture of hydrofluoric acid, dehydration and dehydrogenation catalysts, metallurgical flux. |
| production method | as the ore bodies of the fluorite deposits discovered in China are mostly in the form of sharp inclined veins, the extension depth is also large, so most mines use underground mining method, or shallow open pit mining, deep underground mining. The mining method is mainly based on the method of shallow hole shrinkage. See "phosphorite" for the mining process flow ". There are generally two kinds of mineral processing methods, one is the production of qualified concentrate by hand, and the other is the hand of tailings and lean ore. Fluorite was enriched by flotation. The principle flow of mineral processing is different according to the type of ore, such as the stone and fluorite ore, the principle flow is as follows: calcium hydroxide is dissolved in hydrofluoric acid by neutralization method, and then evaporated, filtered, dried and crushed, finished calcium fluoride was obtained. Its 2HF Ca(OH)2 → CaF2 H2O calcium magnesium phosphate by-product method calcium magnesium phosphate by-product waste gas water absorption, filtration, and then add milk of lime neutralization, heating, and then sedimentation separation, filtration and washing, dehydration, drying, crushing, calcium fluoride product, H2SiF6 3Ca(OH)2 → 3CaF2 H2SiO3 3H2O |
| category | toxic substances |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 4250 mg/kg; Intraperitoneal-mouse LD50: 2638 mg/kg |
| flammability hazard characteristics | toxic fluoride smoke from thermal decomposition |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| extinguishing agent | water, carbon dioxide, foam, dry powder |
| Occupational Standard | TWA 2.5 mg (fluorine)/m3 |
