Boron tribromide
Boron tribromide
CAS: 10294-33-4
Molecular Formula: BBr3
Boron tribromide - Names and Identifiers
| Name | Boron tribromide |
| Synonyms | BBr3 Boron bromide tribromoboron tribromo-Boron tribromoborane tribromo-boran Boron,tribromo- Borane,tribromo- Boron tribromide boronbromide(bbr3) Boron tribromide solution Borontribromidedichloromethane Boronbromideelecgrcolorlesspaleyellowliq |
| CAS | 10294-33-4 |
| EINECS | 233-657-9 |
| InChI | InChI=1/BBr3/c2-1(3)4 |
| InChIKey | ILAHWRKJUDSMFH-UHFFFAOYSA-N |
Boron tribromide - Physico-chemical Properties
| Molecular Formula | BBr3 |
| Molar Mass | 250.523 |
| Density | 2.782g/cm3 |
| Melting Point | -46℃ |
| Boling Point | 91.3°C at 760 mmHg |
| Flash Point | 30 °F |
| Water Solubility | Reacts with water. |
| Vapor Presure | 61.3mmHg at 25°C |
| Vapor Density | 8.6 (vs air) |
| Appearance | colorless solution |
| Storage Condition | Poison room |
| Stability | Moisture Sensitive |
| Refractive Index | 1.549 |
| Physical and Chemical Properties | Fuming colorless viscous liquid with a strong irritant, toxic. Melting point is-46 ℃, the boiling point is 91.3 ℃. It was dissolved in carbon tetrachloride. Easily decomposed by water, alcohol. light or thermal decomposition, heated to explode. It can react with the phosphorus, nitrogen, oxygen, sulfur, halogens, ammonia, alkali, phosphorus halides, phosphines, and many substituents of ammonia. A strong corrosive. Strong irritative to Skin, eye or mucous membrane. Approximate toxicity of hydrogen bromide. United States provides operating maximum allowable concentration of boron tribromide in environment Air is 1ppm (10mg/m3). It is obtained in laboratory by Aluminum tribromide reacting with boron trifluoride, then distillation. can be used as a source of doped semiconductor silicon, but also for the preparation of high purity boron and organic boride. |
| Use | As a semiconductor silicon doping source, but also for the preparation of high-purity boron and organic boron compounds |
Boron tribromide - Risk and Safety
| Hazard Symbols | T+ - Very toxic C - Corrosive  |
| Risk Codes | R14 - Reacts violently with water R26/28 - Very toxic by inhalation and if swallowed. R35 - Causes severe burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S28A - After contact with skin, wash immediately with plenty of water. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S9 - Keep container in a well-ventilated place. |
| UN IDs | UN 3390 6.1/PG 1 |
| WGK Germany | 3 |
| RTECS | ED7400000 |
| FLUKA BRAND F CODES | 10-21 |
| TSCA | Yes |
| HS Code | 28129090 |
| Hazard Class | 8 |
| Packing Group | I |
| Toxicity | 腐蚀物品 |
Boron tribromide - Upstream Downstream Industry
Boron tribromide - Nature
Open Data Verified Data
Trona is monoclinic, the crystal is plate-like, and the aggregates are usually crystal clusters, fibers, radials, etc. Colorless, gray, yellow or brown. Glass gloss. Hardness 2.5~3, density 2.11~2.147g/crri3. The burning flame was yellow. Soluble in water. She has an alkaline taste. No change in dry air. Soluble in inorganic acid well severe foaming. Natural alkali is produced in different salt lake sediments, mainly in the Alkali Lake and ancient sedimentary deposits, often with the needle carbon sodium calcium stone, water alkali, bubble alkali, Stone salt, mirabilite, calcium sulfate, the symbiosis of anhydrous Glauber's salt and gypsum.
Last Update：2024-01-02 23:10:35
Boron tribromide - Preparation Method
Open Data Verified Data
general open-pit mining of alkali mine in Salt Lake, and underground dissolution mining of ancient alkali mine. The process flow of sampling and dressing.
1. Open-pit mining: deposit-stripping (transport)-mining (including shipment)-silo
2. Underground dissolution method: deposit-drilling-cementing-perforation-fracturing-water injection (with NaOH and other cosolvents)-halogen mining-halogen infusion-alkali halogen processing
Last Update：2022-01-01 10:58:09
Boron tribromide - Use
Open Data Verified Data
Trona is mainly used for the preparation of soda ash, caustic soda, soda and other products. Soda ash is an important industrial raw material, which is widely used in glass, chemical industry, light industry, textile, bleaching and dyeing, metallurgy, petroleum processing, medicine, food and so on. Caustic soda is mainly used in man-made fiber, paper making, dyes, soap, plastics, pharmaceuticals, pesticides and so on. Baking soda is mainly used in food, plastic, rubber, medicine, printing and dyeing, tanning, agricultural soaking and other fields.
Last Update：2022-01-01 10:58:08
Boron tribromide - Safety
Open Data Verified Data
raw ore bulk, mine delivery, railway, road transport. The export caustic soda of chaganol Trona chemical plant uses 200kg cold rolled plate barrel to coat the outer surface of the varnish, which effectively prevents the corrosion of the packaging materials and the pollution to the environment. Sodium bicarbonate, mirabiline and Yuanming powder are packed in plastic bags, railway transportation; Liquid caustic soda shall be transported from each Railway tank car.
Last Update：2022-01-01 10:58:10
Boron tribromide - Introduction
melting point & minus;46°C(lit.)
Boiling point ~ 90°C
Density 2.60g/mL at 20 c (lit.)
Vapor density 8.6 (vs air)
Vapor pressure 40mm Hg (14°C)
Refractive index 1.4340
Flash point 30 °F
Storage conditions Poison room
Solubility Miscible with ethanol and carbon tetrachloride.
Morphological Solution
Color colorless
Specific gravity 2.65
Water solubility reacts with water.
Sensitivity Moisture Sensitive
Merck 14,1347
Stable, but reacts violently with water.
InChIKey ILAHWRKJUDSMFH-UHFFFAOYSA-N
introduction
Boron tribromide is an inorganic compound. It is a colorless liquid at room temperature. It reacts with moisture in the air to smoke and generate boric acid and hydrogen bromide. It can be made by co-heating of boron trioxide, carbon and bromine: in the reaction, elemental boron is first formed, and then boron directly reacts with bromine.
physical and chemical properties colorless smoke viscous liquid, strong irritation, toxic. Melting point -46 ℃, boiling point 91.3 ℃. Soluble in carbon tetrachloride. It is easy to be decomposed by water and alcohol, and it will explode when exposed to light or heat. It can react with phosphorus, nitrogen, oxygen, sulfur, halogen, ammonia, alkali, phosphorus halide, phosphine and many ammonia substituents. It's highly corrosive. Strong irritation to skin, eyes or mucous membranes. The toxicity is similar to hydrogen bromide. The United States stipulates that the maximum allowable concentration of boron tribromide in the air of the operating environment is 1ppm(10mg/m3). The laboratory is prepared by distillation through the reaction of aluminum tribromide and boron trifluoride. It can be used as a doping source for semiconductor silicon, and is also used for the preparation of high purity boron and organic borides.
Other related chemical reactions involving boron tribromide:
Boron tribromide is continuously introduced into hydroiodic acid at 300~400 ℃ to obtain a mixture of BIBr2, BI2Br and BI3, and then separated by distillation to obtain boron dibromoiodide.
Boron tribromide reacts with adamantane to produce 1-bromoadantane.
quenching method
Add it to a large amount of ice water under stirring (it cannot be reversed), and then neutralize with alkali after confirming the reaction. For phosphorus oxychloride that does not react with ice water immediately, slowly pour it into normal temperature water to confirm that the reaction is over, then continue to add, add ice to cool from time to time, and finally neutralize with alkali under cooling. During treatment, it can only be slowly added to water (lye), and water must not be added to the above compound.
Boron halide Boron trifluoride, boron trichloride, boron tribromide and boron triiodide are four common boron halides. The latter three types of boron halide can be produced by high-temperature reduction of halogen and boron trioxide in the presence of carbon reducing agent. The reaction equation is as follows: B2O3 3C 3Cl2=2BCl3 3CO, and boron trifluoride can be prepared by hydrogen fluoride (fluorite and concentrated. Boron halides are all covalent molecules, and their vapor state exists as a flat triangle single molecule. Boron atoms adopt sp2 hybrid orbitals. The electron-filled P orbitals of halogen atoms perpendicular to the plane and the empty P orbitals of boron atoms perpendicular to the plane can form large & pi; Bond & pi;64. Experiments show that the measured bond length (e. g. the bond length of a B- Cl is 173pm) is much shorter than that of a single bond length (B-Cl the bond length of a single bond is 187pm), which indicates that it is large & pi; The existence of keys. The melting point of these four halides is low, with boron trifluoride as the lowest, and the boiling point increases with the increase of the halogen atomic number, indicating that the four halides are covalent molecules, and the gravitational force between molecules is Van der Waals force. Among the four halides, the stability from boron trifluoride to boron triiodide decreased in turn. Boron halide is easy to hydrolyze to form boric acid.
toxic boron tribromide has a strong stimulating effect on human tissues, and its vapor is highly toxic and corrosive. Wear gas masks, gloves and protective clothing during operation. It is strictly prohibited to suck human vapor. After poisoning, he was immediately sent to the hospital for treatment.
Chemical properties trona is monoclinic crystal system, the crystal is plate-shaped, colorless, gray, yellow or brown. Soluble in water. It has an alkaline taste.
The use is the main chemical raw material for the production of caustic soda, baking soda, and soda ash. It is widely used in the soda industry
Uses Used as a doping source for semiconductor silicon, and can also be used for the preparation of high-purity boron and organoboron compounds
Use Trona is mainly used to prepare soda ash, caustic soda, baking soda and other products. Soda ash is an important industrial raw material, widely used in glass, chemical industry, light industry, textile, bleaching and dyeing, metallurgy, petroleum processing, medicine, food and other aspects. Caustic soda is mainly used in man-made fibers, paper making, dyes, soap, plastics, medicine, pesticides, etc. Baking soda is mainly used in food, plastics, rubber, medicine, printing and dyeing, tanning, agricultural soaking and other fields.
Uses Used as doping materials for semiconductors, catalysts, intermediates and brominating agents for organic synthesis. It is a raw material for the manufacture of high-purity boron and other organoboron compounds.
Uses for the synthesis of organic boron and the preparation of high-purity boron
Uses Used as a catalyst, intermediate and brominating agent for organic synthesis, and a raw material for the manufacture of high-purity boron and other organoboron compounds.
production method direct synthesis method puts dry element boron powder into the reaction tube of the tubular reactor. in order to fully carry out the reaction, a certain amount of filler should be put into the reaction tube, and the filler material is the same as the tube wall. The reaction tube is heated to 850°C, and the bromine is also heated to a slight boiling in the bromine kettle at the same time, and then the reaction tube is passed. The boron bromide liquid generated by the reaction is heated and refluxed with activated carbon, zinc powder and aluminum chips in a debrominator until the generated boron bromide is colorless, and then rough distillation and rectification are carried out to produce a completely colorless boron bromide finished product. Its
2B 3Br2→2BBr3
production method salt lake alkali ore is generally open-pit mining, and ancient alkali ore is generally mined by underground dissolution method. Mining process
1. Open pit mining 2 underground dissolution method
Category Corrosion Articles
Toxicity grading poisoning
The dangerous characteristics of explosives are explosive gases when exposed to water or heated; the hydrolysate is corrosive to the skin and cornea
Flammability hazard characteristics decompose toxic bromide and boride gases when exposed to water or heated
Storage and transportation characteristics The warehouse is ventilated and dry at low temperature; it is stored separately from alkalis.
Fire extinguishing agent dry sand, carbon dioxide, dry stone powder, dry soil
Occupational standard TWA 1 PPM (10 mg/m3)
security information
Dangerous goods signs t, c, f, n
Hazard category code 14-26/28-35-40-62-11-67-65-50/53-37-51/53-48/20
Safety instructions 9-26-28-36/37/39-45-23-33-16-62-61-60
Dangerous goods transportation number UN 3390 6.1/PG 1
WGK Germany 3
RTECS ED7400000
F 10-21
TSCA Yes
HazardClass 8
PackingGroup I
Customs code 28129090
Last Update：2024-04-10 22:29:15
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View History
Raw Materials for Boron tribromide
Downstream Products for Boron tribromide
Sodium bicarbonate
(S)-(-)-7,7'-BIS[DI(3,5-DIMETHYLPHENYL)PHOSPHINO]-2,2',3,3'-TETRAHYDRO-1,1'-SPIROBIINDANE
(R)-7,7'-BIS(DIPHENYLPHOSPHINO)-1,1'-SPIROBIINDANE
(S)-1,1'-SPIROBIINDANE-7,7'-DIOL
(11AR)-(+)-10,11,12,13-TETRAHYDRODIINDENO[7,1-DE:1',7'-FG][1,3,2]DIOXAPHOSPHOCIN-5-DIMETHYLAMINE
1,1'-SPIROBIINDANE-7,7'-DIOL
PYRIDAZINE-3,4-DIAMINE
methyl 2-(7-hydroxybenzofuran-3-yl)acetate
2-[3-[Bis(1-methylethyl)amino]-1-phenylpropyl]-4-methylphenol
3-FLUORO-5-METHOXY-PHENOL
4-(1,2,3-THIADIAZOL-4-YL)PHENOL
TRIS(4-HYDROXYPHENYL)PHOSPHINE OXIDE
TRIS(PENTAFLUOROPHENYL)BORANE
(S)-(-)-7,7'-BIS[DI(3,5-DIMETHYLPHENYL)PHOSPHINO]-2,2',3,3'-TETRAHYDRO-1,1'-SPIROBIINDANE
(R)-7,7'-BIS(DIPHENYLPHOSPHINO)-1,1'-SPIROBIINDANE
(S)-1,1'-SPIROBIINDANE-7,7'-DIOL
(11AR)-(+)-10,11,12,13-TETRAHYDRODIINDENO[7,1-DE:1',7'-FG][1,3,2]DIOXAPHOSPHOCIN-5-DIMETHYLAMINE
1,1'-SPIROBIINDANE-7,7'-DIOL
PYRIDAZINE-3,4-DIAMINE
methyl 2-(7-hydroxybenzofuran-3-yl)acetate
2-[3-[Bis(1-methylethyl)amino]-1-phenylpropyl]-4-methylphenol
3-FLUORO-5-METHOXY-PHENOL
4-(1,2,3-THIADIAZOL-4-YL)PHENOL
TRIS(4-HYDROXYPHENYL)PHOSPHINE OXIDE
TRIS(PENTAFLUOROPHENYL)BORANE