Chemical Formula	C4H9Li
Molecular Weight	64.06
Structural Formula
Density	0.68g/mLat 20°C
Melting Point	-95 °C
Boiling Point	80°C
Flash Point	10°F
Water Solubility	vigorous reaction
Solubility	Miscible with diethyl ether and cyclohexane.
Storage Conditions	2-8°C
Sensitivity	Air & Moisture Sensitive
Appearance	Liquid
Specific Gravity	0.695
Color	yellow
Odor	Odor of the solvent
BRN	1209227
Exposure Limits	ACGIH: TWA 50 ppm (Skin)OSHA: TWA 500 ppm(1800 mg/m3)NIOSH: IDLH 1100 ppm; TWA 50 ppm(180 mg/m3)
Physicochemical Properties	It is a liquid at room temperature, but may also appear as a powder. Boiling point 80-90°C (0.013Pa), relative density 0.68-0.70. Soluble in most organic solvents.

Main Uses:n-Butyllithium has extensive applications in organic synthesis. It can act as a strong base in various organic reactions, such as rearrangement reactions, substitution reactions, condensation reactions, etc. n-Butyllithium can also be used to synthesize organolithium compounds and organometallic compounds, serving as a solvent and reducing agent.

Used to initiate anionic polymerization of conjugated dienes. Through living polymerization pathways, it can synthesize polymers with specified structures such as linear, star, block graft, and telechelic types. It can also be used to prepare low-cis polybutadiene rubber, isoprene rubber, solution styrene-butadiene rubber, thermoplastic rubber, liquid rubber, thermosetting resins, coatings, etc.