1,1-Dimethylethyl cyanide
2-methylpropyl cyanide
CAS: 7188-38-7
Molecular Formula: C5H9N
1,1-Dimethylethyl cyanide - Names and Identifiers
1,1-Dimethylethyl cyanide - Physico-chemical Properties
| Molecular Formula | C5H9N |
| Molar Mass | 83.13 |
| Density | 0.735g/mLat 25°C(lit.) |
| Melting Point | 148-150 °C |
| Boling Point | 91°C(lit.) |
| Flash Point | -2 °C |
| Solubility | Soluble in organic solvents such as ethanol, methanol, ether, toluene and dichloromethane. |
| Appearance | liquid |
| Specific Gravity | 0.735 |
| Color | colorless |
| Exposure Limit | NIOSH: IDLH 25 mg/m3 |
| BRN | 1903156 |
| Storage Condition | Inert atmosphere,2-8°C |
| Stability | store cold |
| Refractive Index | n20/D 1.376(lit.) |
1,1-Dimethylethyl cyanide - Risk and Safety
| Risk Codes | R11 - Highly Flammable R23 - Toxic by inhalation R2017/11/23 - |
| Safety Description | S16 - Keep away from sources of ignition. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 1993 3/PG 2 |
| WGK Germany | 3 |
| RTECS | EQ7102500 |
| HS Code | 29299090 |
| Hazard Class | 3 |
| Packing Group | II |
1,1-Dimethylethyl cyanide - Reference Information
| production method | 1.? Pay attention! Operate in a good fume hood. In a 2-liter round-bottomed flask equipped with a magnetic stirrer, a reflux condenser and a constant-pressure dropping funnel, 300 of water was added and 300g (7.50 mol) of sodium hydroxide was added in portions with stirring and dissolved. In a dropping funnel were placed 141.5G (208 ML, 1.93 mol) tert-butylamine, 117.5G (80 ml, 0.9898 mol) chloroform, 2g benzyl triethyl chloride and 300 ml dichloromethane, after mixing, the mixture was added dropwise to a sodium hydroxide solution at 45 °c with stirring for 30 minutes. At the beginning of the dropwise addition, the reactants began to reflux and a precipitate precipitated after two hours. Stirring was continued for 1 hour and then diluted with 800 of ice water. The organic layer was separated and the aqueous layer was extracted with 100 of dichloromethane. The extract was combined with the organic layer, washed with 100 ml of water and 100 ml of a 5% aqueous solution of sodium chloride in that order, and dried over anhydrous magnesium sulfate. It is filtered and fractionated a through a fractionating column packed with polytetrafluoroethylene so that the solvent and unreacted tert-butylamine can be efficiently recovered. Can also be tert-butylamine and formic acid ethyl ester reaction made of N-tert-butylphthalide gum, and then use phosphorus oxychloride dehydration and the formation of tert-butyl isolac |
| category | flammable liquid |
| toxicity grade | poisoning |
| Acute toxicity | inhalation-rat LC50: 710 mg/m3/4 H; Inhalation-mouse LC50: 377 mg/m3/4 h |
| flammability hazard characteristics | when exposed to heat, open flame, strong oxidant flammable; thermal decomposition of toxic nitrogen oxides and cyanide fumes |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; Protected from open flame, stored separately from oxidant |
| fire extinguishing agent | carbon dioxide, dry powder, foam |
Last Update：2024-04-10 22:29:15
