Borane,tributyl-
Tributylborane
CAS: 122-56-5
Molecular Formula: C12H27B
Borane,tributyl- - Names and Identifiers
| Name | Tributylborane |
| Synonyms | Tributylboron TRIBUTYLBORANE Tributylborane Borane,tributyl- TRI-N-BUTYLBORON Borane, tributyl- TRIBUTYLBORANE (1.0M IN THF) Tributylborane solution 1.0 M in THF Tributylborane, 1.0 M solution in THF, SpcSeal Tributylborane, 1M Solution in Tetrahydrofuran |
| CAS | 122-56-5 |
| EINECS | 204-554-6 |
| InChIKey | CMHHITPYCHHOGT-UHFFFAOYSA-N |
Borane,tributyl- - Physico-chemical Properties
| Molecular Formula | C12H27B |
| Molar Mass | 182.15 |
| Density | 0.834g/mLat 25°C |
| Melting Point | -34 °C |
| Boling Point | 109°C20mm Hg(lit.) |
| Flash Point | 1°F |
| Water Solubility | Not miscible or difficult to mix with water. |
| Solubility | Benzene, Tetrahydrofuran |
| Appearance | Solution |
| Color | Clear colorless to light yellow |
| 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) |
| Storage Condition | Flammables area |
| Sensitive | Air Sensitive |
| Refractive Index | 1.4285 |
Borane,tributyl- - Risk and Safety
| Risk Codes | R17 - Spontaneously flammable in air R34 - Causes burns R40 - Limited evidence of a carcinogenic effect R36/37/38 - Irritating to eyes, respiratory system and skin. R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R11 - Highly Flammable R22 - Harmful if swallowed R19 - May form explosive peroxides R37 - Irritating to the respiratory system |
| Safety Description | S7 - Keep container tightly closed. S23 - Do not breathe vapour. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 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.) S16 - Keep away from sources of ignition. |
| UN IDs | UN 2845 4.2/PG 1 |
| WGK Germany | 1 |
| RTECS | ED1850000 |
| TSCA | Yes |
| HS Code | 29310099 |
| Hazard Class | 4.2 |
| Packing Group | I |
Borane,tributyl- - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Overview | Triethyl boron, tri-n-butyl boron, tri-isobutyl boron, tri-tert-butyl boron, these compounds are colorless liquids and need to be operated under nitrogen flow. In particular, triethylboron [(C2H5)3B] will catch fire immediately when it comes into contact with air, so be very careful when operating. Trialkyl boron with long alkane chain will not react so violently in the air, such as tricyclohexane boron. The boiling point of these liquids is similar to the corresponding hydrocarbons that replace boron atoms with carbon atoms. For example,(C2H5)3B has a boiling point of 95°C;(n-C4H9)3B has a boiling point of 170°C;(iso-C4H9)3B has a boiling point of 88°C (3.07kPa). Some of these compounds are also crystalline, such as phyllenyl boron. Tributylboron has the chemical formula (CH3CH2CH2CH2)3B. Molecular weight 182.20. Colorless liquid. Can spontaneously ignite. Melting point -34 ℃, boiling point 170 ℃(29.526kPa), relative density 0.74725, refractive index 1.4285. Soluble in most organic solvents, insoluble in water. |
| Preparation | The preparation of tributylboron is as follows: Add Mg powder and I2 (a little) to the three-mouth flask, then add BF3 • E2O newly steamed after drying and a certain amount of newly steamed anhydrous ether after drying. Mix bromobutane and ether into ether solution and put it into a constant pressure drop funnel. The reaction occurred after dropping 3-5mL, 12 reddish brown disappeared, and Mg powder boils. When the ether boiling tends to ease, drip the remaining solution in the drip funnel. The ether is made slightly boiling by adjusting the drip rate. After the bromobutane is completely dripped, heat and reflux with a water bath for 3h to complete the reaction and cool to room temperature. The whole reaction is protected by high purity N2 gas. The ether layer is transferred to a single-mouth flask, after the ether is distilled at normal pressure, then distilled under reduced pressure, three-base boron is distilled at 26666.6Pa and 2l7K, and stored in a closed manner. |
| category | spontaneous combustion items |
| toxicity classification | poisoning |
| acute toxicity | oral-rat LD50: 1125 mg/kg |
| flammability hazard characteristics | It can spontaneously ignite when exposed to air, chlorine, oxidant, and high temperature; combustion produces 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 |
Last Update：2024-04-09 15:16:44
