Triethylborane
Triethylborane
CAS: 97-94-9
Molecular Formula: C6H15B
Triethylborane - Names and Identifiers
| Name | Triethylborane |
| Synonyms | Triethylboron Triethyl boron Triethylborane triethylborane solution Triethylborane solution Triethylborane, 1M solution in tetrahydrofuran Triethylborane1M solution in tetrahydrofuranAcroSeal§3 |
| CAS | 97-94-9 |
| EINECS | 202-620-9 |
| InChI | InChI=1/C6H15B/c1-4-7(5-2)6-3/h4-6H2,1-3H3 |
| InChIKey | LALRXNPLTWZJIJ-UHFFFAOYSA-N |
Triethylborane - Physico-chemical Properties
| Molecular Formula | C6H15B |
| Molar Mass | 97.99 |
| Density | 0.865g/mLat 25°C |
| Melting Point | -92°C |
| Boling Point | 95°C |
| Flash Point | 1°F |
| Water Solubility | Decomposes |
| Vapor Presure | 67hPa at 25℃ |
| Appearance | Liquid |
| Color | Colorless to light amber |
| Exposure Limit | ACGIH: TWA 50 ppm; STEL 100 ppm (Skin)OSHA: TWA 200 ppm(590 mg/m3)NIOSH: IDLH 2000 ppm; TWA 200 ppm(590 mg/m3); STEL 250 ppm(735 mg/m3) |
| Merck | 14,9668 |
| BRN | 1731462 |
| Storage Condition | 0-6°C |
| Sensitive | Air Sensitive |
| Refractive Index | n20/D 1.380 |
| Physical and Chemical Properties | Triethylboron, formula (C2H5)3B. Molecular weight 91.95. Colorless smoking liquid. Extremely toxic! Eyes, mucous membranes have a strong stimulating effect, inhalation can cause poisoning. Specific gravity 0.70 (23/4 C). Boiling point 95. Cure at -93 °c. Refractive index 1.3971. Insoluble in water, miscible with most organic solvents. Easy to burn, spontaneous combustion in the air. Intense reaction with water or oxidizing agents. (C2H5)3Al BCl3 →(C2H5)3B AlCl3B2H6 CH2 = CH2 →(C2H5)3B can be prepared by the reaction of triethyl aluminum with boron halide or diborane with ethylene, organic synthesis intermediates, can also be used as rocket propulsion or jet engine ignition agent and fuel, olefin polymerization additives. |
Triethylborane - Risk and Safety
| Risk Codes | R12 - Extremely Flammable R17 - Spontaneously flammable in air R19 - May form explosive peroxides R22 - Harmful if swallowed R34 - Causes burns R66 - Repeated exposure may cause skin dryness or cracking R67 - Vapors may cause drowsiness and dizziness R65 - Harmful: May cause lung damage if swallowed R62 - Possible risk of impaired fertility R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R48/20 - R11 - Highly Flammable R40 - Limited evidence of a carcinogenic effect R37 - Irritating to the respiratory system |
| Safety Description | S7 - Keep container tightly closed. S9 - Keep container in a well-ventilated place. S16 - Keep away from sources of ignition. S23 - Do not breathe vapour. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S29 - Do not empty into drains. S33 - Take precautionary measures against static discharges. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S43 - In case of fire use ... (there follows the type of fire-fighting equipment to be used.) S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S43A - S62 - If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. |
| UN IDs | UN 3399 4.3/PG 2 |
| WGK Germany | 2 |
| RTECS | ED2100000 |
| FLUKA BRAND F CODES | 2-10 |
| TSCA | Yes |
| HS Code | 29319090 |
| Hazard Class | 3 |
| Packing Group | II |
| Toxicity | LD50 orl-rat: 235 mg/kg 14KTAK -,693,64 |
Triethylborane - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Use | Used in organic synthesis, mixed with triethyl aluminum can be used as a two-component ignition for rocket propulsion systems. |
| production method | 1. put 72g (3.0g atom) magnesium chips and 250 ml anhydrous butyl ether in a 1-liter three-neck flask with a mercury-sealed mixer, a reflux cold smelter, a dropping funnel and an air duct. Under nitrogen protection, 500 ml of anhydrous butyl ether solution containing 327 grams (3.0 moles) of olfactory ethane was slowly added dropwise to prepare Grignard reagent. The reaction began to be very intense. The flask must be immersed in a cold water bath to cool, and then 400 ml of butyl ether solution containing 61g 0.9 mol) boron trifluoride must be added dropwise within 4 hours. After that, heat at 70 ℃ for 2 hours, (after the reaction, replace the condenser with a grinding glass plug, and replace the unsealed stirrer with a short fractionation. In this way, the change device should be carried out quickly in the rapid passage of nitrogen to avoid exposure of the mixture to the air). The reaction mixture was directly distilled to collect the fraction at 94-97 ℃ to obtain 65g (74%) of crude triethylboron. When purified, the crude product can be reacted with slightly higher ammonia to form a complex. After steaming the gong under high vacuum, this complex reacts with a slightly excessive amount of dry hydrogen to free triethylboron. Re-distilled and collected in cold hydrazine at -40°C. |
| category | spontaneous combustion items |
| toxicity classification | highly toxic |
| acute toxicity | inhalation-rat LC50: 700 PPM/ 4 hours; Oral administration-rat LD50: 235 mg/kg |
| flammability hazard characteristics | when air, chlorine, oxidant, high temperature and water can spontaneously ignite, it emits toxic boride gas |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; separate from oxidant |
| fire extinguishing agent | dry sand, dry powder, carbon dioxide |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
Supplier List
Featured ProductsSpot supply
Product Name: Triethylborane Request for quotationCAS: 97-94-9
Tel: 15001012717
Email: biz5@infsci.com
Mobile: 15001012717
QQ: 3007471201
Product List: View Catalog
Featured ProductsSpot supply
Product Name: Triethylborane Request for quotationCAS: 97-94-9
Tel: 15001012717
Email: biz5@infsci.com
Mobile: 15001012717
QQ: 3007471201
Product List: View Catalog
View History