Basic information
- CAS
7789-66-4- Standard SMILES
Br[Si](Br)(Br)Br- InChIKey
AIFMYMZGQVTROK-UHFFFAOYSA-N- Molecular formula
- Br4Si
- Average molar mass
- 347.7 g/mol
- Monoisotopic mass
- 343.65028
Overview
Silicon tetrabromide is a chemical compound of silicon and bromine. Pyrolysis of silicon tetrabromide followed by treatment with ammonia yields silicon nitride coatings, a hard compound used for ceramics, sealants, and the production of many cutting tools. Bromine is a halogen element with the symbol Br and atomic number 35. Diatomic bromine does not occur naturally, but bromine salts can be found in crustal rock. (L625, L663)
Names & identifiers
- Preferred name
- Silicon tetrabromide
- IUPAC
- tetrabromosilane
- English name
- SILICON TETRABROMIDE
- Molecular formula
- SiBr4
- Molecular weight
- 347.7
Names & synonyms
TetrabromosilaneSilicon tetrabromide7789-66-4Silicon bromideSiBr4UNII-8GAC9YWL428GAC9YWL42SILICONTETRABROMIDESilicon bromide (SiBr4)EINECS 232-182-4DTXSID6064872SILICON TETRABROMIDE [MI]
Show more names
tetrabromo-silanSilicon(Ⅳ)bromideSilane,tetrabromo-Tetrabromide Silicon
RefChem:183006DTXCID8048076232-182-4Silicon(IV) bromideSilane, tetrabromo-MFCD00049530Br4SiSilicon tetrabromide, 99%
Database identifiers
- CAS
7789-66-4- PubChem CID
- 82247
- DTXSID
DTXSID6064872- UNII
- 8GAC9YWL42
- EC Number
- 232-182-4
- Nikkaji
- J95.308C
Properties
Computed structural properties
- Topological polar surface area
- 0 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 0
- Rotatable bonds
- 0
- Heavy atoms
- 5
- Formal charge
- 0
- Complexity
- 19.1
Experimental & physicochemical properties
SpringerMaterials Properties29Si nuclear magnetic resonance spectrum
Physicochemical properties
- Melting point
- 5 °C · 5 °C (lit.)
- Boiling point
- 153 °C · 153 °C (lit.)
- Density
- 2.8 g/mL · 2.8 g/mL at 25 °C (lit.)
- vapor density
- 2.8 · 2.8 (vs air)
- refractive index
- 1.5627 · 1.5627
- Flash point
- 154 °C · 154°C
- solubility
- 2 O · reacts with H2O
- form
- Liquid
- Specific Gravity
- 2.772 · 2.772
- color
- Colorless to pale yellow
- Water Solubility
- 6 · decomposed in water to HBr, silicic acid, with evolution of heat [MER06]
- Specific Heat Capacity
- 0.28 J/ · Cp(gas): 0.28 J/(g·K), at 25℃
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
GHS classification
GHS Classification
Danger
H302 (33.3%): Harmful if swallowed [Warning Acute toxicity, oral]
P260, P261, P264, P264+P265, P270, P271, P280, P301+P317, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P319, P321, P330, P362+P364, P363, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 66 reports by companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Hazard information
Hazard Classes and CategoriesAcute Tox. 4 (33.3%)
Toxicology
Treatment
EYES: irrigate opened eyes for several minutes under running water. INGESTION: do not induce vomiting. Rinse mouth with water (never give anything by mouth to an unconscious person). Seek immediate medical advice. SKIN: should be treated immediately by rinsing the affected parts in cold running water for at least 15 minutes, followed by thorough washing with soap and water. If necessary, the person should shower and change contaminated clothing and shoes, and then must seek medical attention. INHALATION: supply fresh air. If required provide artificial respiration.
Health Effects
Bromine vapour causes irritation and direct damage to the mucous membranes. Elemental bromine also burns the skin. The bromide ion is a central nervous system depressant and chronic exposure produces neuronal effects. This is called bromism and can result in central reactions reaching from somnolence to coma, cachexia, exicosis, loss of reflexes or pathologic reflexes, clonic seizures, tremor, ataxia, loss of neural sensitivity, paresis, papillar edema of the eyes, abnormal speech, cerebral edema, delirium, aggressiveness, and psychoses. (L625, L626, L627)
Chemistry & industry
Pharmacology
Metabolism/Metabolites
Bromine is mainly absorbed via inhalation, but may also enter the body through dermal contact. Bromine salts can be ingested. Due to its reactivity, bromine quickly forms bromide and may be deposited in the tissues, displacing other halogens. (L626)
Uses & manufacturing
General Manufacturing InformationSilane, tetrabromo-: ACTIVE
Applications
UsesSilicon tetrabromide (SiBr4) may be used to prepare photoluminescent silicon nanocrystals by chemical reduction with alkaline metals.
Upstream & downstream products
Downstream products
Suppliers50 total
上海源象化学有限公司17312431727 · [email protected]
江苏艾康生物医药研发有限公司025-66061636 19370895928 · [email protected]
Dayang Chem (Hangzhou) Co.,Ltd.+86-0571-88938639 17705817739 · [email protected]
Aladdin Scientific[email protected]
上海迈瑞尔生化科技有限公司4006356688 18621169109 · [email protected]
Related reactions
0 records
No reaction records under the current filter.
Compound notes
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