1-Butyl-3-methylimidazolium acetate CAS 284049-75-8

1. Description

1-Butyl-3-methylimida zolium acetate (CAS 284049-75-8) is an imidazolium-based ionic liquid recognized for its unique solvent properties, particularly relevant in pharmaceutical contexts involving biomaterials. Its acetate anion (CH3​COO−) acts as an effective hydrogen bond acceptor, enabling the dissolution of challenging biopolymers like cellulose, useful for advanced formulation or excipient processing. This specialty solvent is explored for drug delivery systems and specific synthetic applications benefiting from its low volatility and solvating power.

2. Properties Table

Property	Value
Chemical Name	1-Butyl-3-methylimidazolium acetate
Abbreviation	BMIM-OAc; [BMIM][OAc]
CAS Number	284049-75-8
Molecular Formula	C10​H18​N2​O2​
Molecular Weight	$198.27g/mol$
Appearance	Colorless to pale yellow liquid
Purity	$>98.0\%$
Nature	Weakly basic; Strong H-bond acceptor
Melting Point	< $25°C$
Density	Approx. 1.06g/cm3
Solubility	Soluble in water and polar organic solvents

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