butyllithium

CAS No. 109-72-8

Formula: C4H9Li
Basic Info

n-Butyllithium (abbreviated n-BuLi) is an organolithium reagent. It is widely used as a polymerization initiator in the production of elastomers such as polybutadiene or styrene-butadiene-styrene (SBS). Also, it is broadly employed as a strong base (superbase) in the synthesis of organic compounds as in the pharmaceutical industry.
Butyllithium is commercially available as solutions (15%, 25%,1.5 M, 2 M, 2.5 M, 10 M, etc.) in alkanes such as pentane, hexanes, and heptanes. Solutions in diethyl ether and THF can be prepared, but are not stable enough for storage. Annual worldwide production and consumption of butyllithium and other organolithium compounds is estimated at 1800 tonnes.; Although butyllithium is colorless, n-butyllithium is usually encountered as a pale yellow solution in alkanes. Such solutions are stable indefinitely if properly stored, but in practice, they degrade upon aging. Fine white precipitate (lithium hydride) is deposited and the color changes to orange.

Formula
C4H9Li
Molecular Weight
64.0553
Exact Mass
64.0864
LogP
1.7541
PSA
0
Synonyms

N-BUTYLLITHIUM (IN HEXANE)

N-BUTYLLTHIUM

1.6 M N-Butyl lithium

lithium,butane

N-BUTYL LITHIUM

LITHIUM, BUTYL-

n-Butyllithiu

N-BUTYLLITHIUM, 1.6M SOLN. IN HEXANES

n-Butyllithium

Butyllithium

BUTYL LITHIUM

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Properties
Appearance & Physical State
Clear, yellow solution. Commercially available as solutions (15%, 25%, 2 M, 2.5 M, 10 M, etc.) in alkanes such as pentane, hexanes, or heptanes.
Density
0.68 g/mL at 20ºC
Boiling Point
80ºC
Melting Point
80ºC
Flash Point
10 °F
Water Solubility
vigorous reaction
Stability
Stable under normal temperatures and pressures.
Storage Condition
2-8ºC
Safety Info
Safety Statements
S16-S26-S36/37/39-S43-S45-S46-S62-S6
WGK Germany
3
Risk Statements
R11; R14/15; R17; R35; R48/20; R63; R65; R67
HS Code
2931900090
RIDADR
UN 2445
Hazard Class
4.3
Packing Group
I
Caution Statement
P210; P231 + P232; P280; P301 + P310; P302 + P334; P303 + P361 + P353; P304 + P340 + P310; P305 + P351 + P338; P331; P422
Hazard Codes
Spectrum
NMR Spectrum 1H NMR : Predict
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Related Compound Information

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