PRODUCT Properties
| Density | 0.769 g/mL at 25 °C |
| Flash point: | 1 °F |
| storage temp. | 2-8°C |
| form | Liquid |
| color | Clear colorless |
| Sensitive | Air & Moisture Sensitive |
| BRN | 3587206 |
| Exposure limits | ACGIH: TWA 100 ppm OSHA: TWA 300 ppm(1050 mg/m3) NIOSH: IDLH 1300 ppm; TWA 300 ppm(1050 mg/m3) |
| InChIKey | VATDYQWILMGLEW-UHFFFAOYSA-N |
| CAS DataBase Reference | 598-30-1(CAS DataBase Reference) |
| EPA Substance Registry System | Lithium, (1-methylpropyl)- (598-30-1) |
Description and Uses
sec-Butyllithium. [598-30-1], sec-C4H9Li, Mr 64.06, is a spontaneously flammable, colorless, viscous liquid that forms tetramers in hydrocarbon solvents. It is commercially available only as 12 % solution in cyclohexane and methylcyclohexane. sec-Butyllithium is more nucleophilic and decomposes more readily than n-butyllithium. A 12 % solutionin cyclohexane at 20 ℃ undergoesthermal decomposition to the extent of 1.4 % of the active material per month. The thermal decomposition yields butene gas and LiH; the latter is insoluble and responsible for the increasing turbidity of secbutyllithium solutions on prolonged storage. Therefore solutions of sec-butyllithium must be kept cool during storage and transportation.
sec-Butyllithium is used almost exclusively as a polymerization catalyst. It is more expensive than n-butyllithium and is used mainly because of its greater reactivity and faster polymerization initiation.
Safety
| Symbol(GHS) |      GHS02,GHS05,GHS07,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H225-H250-H260-H304-H314-H336-H410-H252-H318-H400 |
| Precautionary statements | P301+P310a-P303+P361+P353-P305+P351+P338-P501a-P210-P222-P223-P231+P232-P370+P378-P422 |
| Hazard Codes | F,C,N |
| Risk Statements | 11-15-17-34-50/53-65-67-66-51/53-14/15 |
| Safety Statements | 26-36/37/39-43-45-60-61-62-33-16 |
| RIDADR | UN 3394 4.2/PG 1 |
| WGK Germany | 2 |
| F | 1-10 |
| TSCA | Yes |
| HazardClass | 4.3 |
| PackingGroup | I |
| HS Code | 29319090 |
