Carbon tetrabromide
Carbon tetrabromide
CAS: 558-13-4
Molecular Formula: CBr4
Carbon tetrabromide - Names and Identifiers
Carbon tetrabromide - Physico-chemical Properties
| Molecular Formula | CBr4 |
| Molar Mass | 331.63 |
| Density | 3,42 g/cm3 |
| Melting Point | 88-90°C(lit.) |
| Boling Point | 190°C(lit.) |
| Flash Point | 190°C |
| Water Solubility | insoluble |
| Vapor Presure | 40 mm Hg ( 96 °C) |
| Appearance | Crystalline Solid |
| Color | White to off-white |
| Exposure Limit | ACGIH: TWA 0.1 ppm; STEL 0.3 ppmNIOSH: TWA 0.1 ppm(1.4 mg/m3); STEL 0.3 ppm(4 mg/m3) |
| BRN | 1732799 |
| Storage Condition | Store below +30°C. |
| Refractive Index | 1.5942 |
| Physical and Chemical Properties | Off-white powder. The melting point of the alpha type of 48.4 degrees Celsius, beta type of 90.1 degrees Celsius. Boiling point 189-190 ℃,102 ℃(6.55kPa), relative density 2.9609(100/4 ℃), refractive index 1.5942(99.5 ℃). Insoluble in water, soluble in chloroform, carbon disulfide, hydrofluoric acid, ethanol, ether solubility of 3%. |
Carbon tetrabromide - Risk and Safety
| Risk Codes | R37/38 - Irritating to respiratory system and skin. R41 - Risk of serious damage to eyes R36 - Irritating to the eyes R26 - Very Toxic by inhalation R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R22 - Harmful if swallowed |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S27 - Take off immediately all contaminated clothing. S24 - Avoid contact with skin. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 2516 6.1/PG 3 |
| WGK Germany | 3 |
| RTECS | FG4725000 |
| TSCA | Yes |
| HS Code | 29033036 |
| Hazard Class | 6.1 |
| Packing Group | III |
Carbon tetrabromide - Nature
Open Data Verified Data
off-white powder. The melting point of a type of 48.4 deg C, p type 90.1 deg C. The relative density was 3. 42. Boiling point 189~190 deg C. Insoluble in water, soluble in chloroform, carbon disulfide, hydrofluoric acid, ethanol, ether solubility of 3%.
Last Update：2024-01-02 23:10:35
Carbon tetrabromide - Preparation Method
Open Data Verified Data
with carbon tetrachloride as raw material, and aluminum bromide reaction.
Last Update：2022-01-01 10:13:55
Carbon tetrabromide - Use
Open Data Verified Data
used in the manufacture of Medicine (anesthetic), refrigerant, can be used as pesticide raw materials, dye intermediates, analytical chemical reagents, for the synthesis of quaternary ammonium compounds.
Last Update：2022-01-01 10:13:56
Carbon tetrabromide - Safety
Open Data Verified Data
- toxic. Acute poisoning can stimulate the upper respiratory tract, damage the lungs, liver, kidney. Low-grade chronic exposure can cause liver damage. In addition, there is a tear effect (low concentration also has a role). The maximum allowable concentration in air is 1.4mg/m3. The operator should wear protective gear.
- in log glass bottles, external use of wooden box or carton protection. Should be stored in a cool, dry, ventilated warehouse. Keep away from fire and heat source. Sealed storage. According to the general provisions of the storage and transportation of chemicals.
Last Update：2022-01-01 10:13:56
Carbon tetrabromide - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Crystal structure | Carbon tetrabromide has two crystal forms, crystal form II (or β) below 46.9°C and above 46.9°C I (or α). Single crystal has C2/c space group, unit cell parameters are a = 20.9, B = 12.1, c = 21.2 (.10 − 1 nm), β = 110.5. The bond energy of C- Br is 235 kJ.mol − 1. Its symmetry replaces the tetrahedral structure so that the dipole moment is 0 Debye. Its critical temperature is 439 ° C (712 K) and its critical pressure is 4.26 MPa. |
| Application | Carbon tetrabromide can be used as a solvent for oils, waxes and oils, and is used for blow molding and vulcanization in the plastics and rubber industries for further polymerization. It can also be used as a sedative and as an intermediate in the manufacture of agricultural chemicals. Because it is not flammable, it is used as a component of refractory chemicals. Due to its high density, it can also be used for mineral separation. |
| use | used in the manufacture of medicines (anesthetics), refrigerants, pesticide raw materials, dye intermediates, analytical chemical reagents, and synthesis of quaternary ammonium compounds. |
| Production method | It is obtained by the reaction of carbon tetrachloride and aluminum tribromide. |
| category | toxic substances |
| toxicity classification | highly toxic |
| acute toxicity | subcutaneous-mouse LD50: 298 mg/kg |
| flammability hazard characteristics | combustible, the fire field discharges spicy and irritating smoke containing bromide |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; separate from food storage and transportation |
| fire extinguishing agent | sand, water |
| occupational standard | TWA 1.4 mg/m3 |
| 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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