Isopropenyl Acetate CAS 108-22-5

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Isopropenyl acetate is a clear colorless liquid that serves as a reactive enol ester derived from acetone. It functions primarily as a versatile chemical intermediate with established utility in acetylation reactions and as the principal feedstock for acetylacetone manufacturing. The compound exhibits good reactivity under controlled conditions and is handled as a flammable liquid in industrial settings.

Basic Information

CAS No.	108-22-5
EC No.	203-562-7
Linear Formula	CH3COOC(CH3)=CH2
Molecular Weight	100.12 g/mol
Appearance	Colorless to almost colorless clear liquid
Melting Point	-93 °C (lit.)
Boiling point	94–97 °C (lit.)
Density	0.92 g/mL at 20 °C (lit.)
RIDADR	UN 2403 Class 3 / PG II
Chemical Structure

Key Applications

• Primary precursor to acetylacetone: Isopropenyl acetate is the principal starting material for industrial production of acetylacetone through rearrangement processes, supporting downstream manufacture of pharmaceuticals, agrochemicals, and chelating agents.

• Acetylating agent in synthesis: It serves as an efficient reagent for acetylation of alcohols, phenols, and amines, particularly valuable in the preparation of pharmaceutical intermediates and specialty fine chemicals under mild conditions.

• Building block for enol derivatives: The compound enables preparation of enol acetates and related intermediates in multi-step organic synthesis routes for advanced chemical products.

• Polymer and resin applications: It is utilized as a reactive component or comonomer in the formulation of certain specialty polymers and resin systems.

• Laboratory and R&D reagent: Widely employed in research laboratories for enol protection strategies and as a convenient acetone enolate equivalent in synthetic methodology development.

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Product Quality & Consistency: High-purity Isopropenyl acetate is supplied with strict batch-to-batch consistency backed by rigorous quality assurance protocols suitable for demanding industrial processes.

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Hazards Classification

Isopropenyl acetate is classified as a flammable liquid under GHS. Appropriate engineering controls, personal protective equipment, and storage away from ignition sources are required. It may cause respiratory tract irritation upon inhalation of vapors.

GHS Classification: Flammable liquids (Category 2) — GHS02; Specific target organ toxicity — single exposure, Respiratory tract irritation (Category 3) — GHS07; Hazardous to the aquatic environment, acute hazard (Category 3)

Hazard Statements: H225 — Highly flammable liquid and vapour; H335 — May cause respiratory irritation; H402 — Harmful to aquatic life.

UN Number: UN 2403

Hazard Class: 3 (Flammable liquids)

Packing Group: II