Calcium bromide anhydrous
Calcium bromide anhydrous
CAS: 7789-41-5
Molecular Formula: Br2Ca
Calcium bromide anhydrous - Names and Identifiers
Calcium bromide anhydrous - Physico-chemical Properties
| Molecular Formula | Br2Ca |
| Molar Mass | 199.89 |
| Density | 3.353 g/mL at 25 °C (lit.) |
| Melting Point | 730°C |
| Boling Point | 806-812°C |
| Flash Point | 806-812°C |
| Water Solubility | Soluble in water, methanol, ethanol and acetone. Insoluble in dioxane, chloroform and ether. |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | beads |
| Specific Gravity | 3.353 |
| Color | White to off-white |
| Merck | 14,1654 |
| Stability | hygroscopic |
| Sensitive | Hygroscopic |
| Physical and Chemical Properties | Character: colorless, oblique-like crystal or crystal block. Odorless, salty and bitter. melting point 730 ℃ (micro-decomposition) boiling point 806~812 ℃ relative density 3.353(25 ℃) solubility: very soluble in water; Soluble in ethanol, acetone and acid; Slightly soluble in methanol, liquid ammonia; Insoluble in ether or chloroform. |
| Use | Mainly used as offshore oil drilling and completion fluid, cementing fluid, workover fluid |
Calcium bromide anhydrous - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R38 - Irritating to the skin R41 - Risk of serious damage to eyes |
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. S39 - Wear eye / face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| WGK Germany | 2 |
| RTECS | EV9328000 |
| TSCA | Yes |
Calcium bromide anhydrous - Upstream Downstream Industry
Calcium bromide anhydrous - Nature
Open Data Verified Data
colorless oblique crystal or crystal block, odorless, salty and bitter. Relative density 3. 353 (25 ℃), melting point 730 ℃ (micro decomposition), boiling point 806~812 ℃. Very soluble in water, aqueous solution is neutral; Soluble in ethanol, acetone and acid, slightly soluble in methanol, liquid ammonia; Insoluble in B
Ether or chloroform. A double salt may be formed with an alkali metal halide. Has a strong hygroscopicity.
Last Update：2024-01-02 23:10:35
Calcium bromide anhydrous - Preparation Method
Open Data Verified Data
- ferrous bromide method: in a reactor containing water, iron chips are added, bromose is added in batches under stirring, the reaction is carried out at 40 ℃ to generate ferrous bromide, and calcium hydroxide is added to adjust the pH value, after heating to boiling, the ferrous hydroxide is removed by cooling and separation. The filtrate is evaporated, cooled to 30 °c and allowed to stand, decolorized, filtered, evaporated to about 210 °c, and then cooled, calcium bromide was prepared.
- Direct method: ammonia gas is passed into lime milk, bromine is added, reaction is carried out at 70 ℃ and below, filtration is carried out, and the filtrate is kept under alkaline conditions to drive out ammonia, stand, decolorize, and the filtrate is concentrated, A finished calcium bromide product was prepared.
Last Update：2022-01-01 10:59:15
Calcium bromide anhydrous - Use
Open Data Verified Data
used in oil drilling, also used in the manufacture of ammonium bromide and photosensitive paper, fire extinguishing agent, refrigerant and so on. Medicine used as a central nervous depressant, with inhibition, sedation, for the treatment of neurasthenia, epilepsy and other diseases.
Last Update：2022-01-01 10:59:14
Calcium bromide anhydrous - Safety
Open Data Verified Data
- packaged in brown glass bottles with a net weight of 500g per bottle. Storage in a cool, dry place, should be sealed and protected from light. Transport should be protected from rain and sun exposure, handling should be light, to prevent damage to the package. When there is a fire, it can be suppressed by sand and various kinds of fire extinguisher.
- toxicity and protection: There is irritation to the eyes and skin, such as skin, eye contact with calcium bromide saline, immediately rinse with water for 15min.
Last Update：2022-01-01 10:59:15
Calcium bromide anhydrous - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Chemical reaction | calcium bromide participates in the following reactions: caBr2 Cl2 = CaCl2 Br2CaBr2 2KF = CaF2 2KBr3CaBr2 K2Cr2O7 7H2SO4=2CaSO4 Cr2(SO4)3 K2SO4 3Br2 7h2ecr2 MnO2 3so4 = Ca(HSO4)2 mnbr2 2h2or2 K2C4H2O6 = White CaC4H4O6 (HSO4) 2KBr |
| solubility in water (g/100ml) | grams dissolved per 100ml of water at different temperatures (℃): 125g/0 ℃;132g/10 ℃;143g/20 ℃;213g/40 ℃; 278g/60 ℃;295g/80 ℃;312g/100 ℃ |
| toxicity | eye and skin irritation, such as skin, eye exposure to calcium bromide saline, immediately rinse with water for 15 min and consult a doctor. |
| Application | used as a central nervous depressant in medicine, used in oil drilling, manufacturing ammonium bromide, photosensitive paper, fire extinguishing agent, refrigerants, etc. are used for oil drilling. It is also used in the manufacture of ammonium bromide and photosensitive paper, fire extinguishing agent, refrigerant, etc. Medicine used as a central nervous depressant, with inhibition, sedation, for the treatment of neurasthenia, epilepsy and other diseases. mainly used as offshore oil drilling completion fluid, cementing fluid, workover fluid used as analytical reagent, also used in photography, pharmaceutical industry |
| production method | ferrous bromide process in a reactor containing water, iron chips are added, and bromine is added in batches with stirring, the reaction is carried out at 40 ℃ to form ferrous bromide, and calcium hydroxide is added to adjust the pH value, heated to boiling, then the ferrous hydroxide is cooled and separated to remove, and the filtrate is evaporated and cooled to 30 ℃ to stand still, after decolorization, filtration, evaporation to about 210 deg C, and then by cooling, prepared calcium bromide. Its Fe Br2 → febr2frr2 ca(OH)2 → CaBr2 Fe(OH)2 ↓ direct method ammonia into the milk of lime, adding bromine, reaction below 70 ℃, filtration, the filtrate was maintained under alkaline conditions to remove ammonia, allowed to stand, decolorized, and the filtrate was concentrated to obtain a calcium bromide product. |
| category | toxic substances |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 4100 mg/kg; Intraperitoneal-mouse LD50: 740 mg/kg |
| flammability hazard characteristics | toxic bromide fumes from thermal decomposition |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| extinguishing agent | water, foam, carbon dioxide, dry powder |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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Raw Materials for Calcium bromide anhydrous