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| Appearance: | Liquid |
| Quality: | Industrial |
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1. Chemical Identity
Chemical Name: DIBUTYL CARBONATE(DBC)
IUPAC Name: Dibutyl carbonate
CAS Registry Number: 542-52-9
Molecular Weight: 174.24 g/mol
2. Structural and Physical Properties
Structure: It is the diester of carbonic acid and *n*-butanol. The molecule consists of a central carbonate group (-O-C(O)-O-) flanked by two *n*-butyl chains.
Appearance: Colorless to pale yellow clear liquid.
Odor: Characteristic, mild ester-like odor.
Boiling Point: Approximately 207-209 °C.
Density: ~0.92 g/mL at 25 °C.
Solubility: Miscible with many common organic solvents (alcohols, ethers, esters). Immiscible with water.
Flash Point: ~77 °C (closed cup) - Flammable liquid.
Organic Synthesis Intermediate: Used as a carbonylating and butoxycarbonylating agent in the synthesis of carbonates, carbamates, and other compounds. It is a greener alternative to phosgene or alkyl halides in some carbonylation reactions.
Electrolyte Additive (Lithium-ion Batteries): This is a significant modern application. It is added in small quantities to the liquid electrolyte of lithium-ion batteries to help form a stable Solid Electrolyte Interphase (SEI) on the anode surface, which improves battery performance, lifespan, and safety.
Solvent & Formulation Component: Used as a solvent for resins, polymers, and in specialty coatings due to its good solvating power and relatively high boiling point.
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