What is Benzoyl Chloride?

Benzoyl chloride is an aromatic acyl chloride with CAS 98-88-4 and molecular formula C₇H₅ClO. It is a colorless to weakly yellow fuming liquid that reacts with moisture and alcohols.

What is Benzoyl Chloride used for?

It is mainly used as a benzoylation reagent in organic synthesis. Key downstream products include benzoyl peroxide, dyes, pigments, fragrances, pharmaceuticals, resins, coatings and agrochemical intermediates.

Why is benzoyl chloride important in polymer chemistry?

It is a key feedstock for benzoyl peroxide, a widely used radical initiator for polymerization and curing. The acyl chloride group allows controlled introduction of the benzoyl group into peroxides and other functional molecules.

What specifications should be checked when ordering?

Confirm assay, free acid, hydrolyzable chloride, color and related aromatic impurities. Low free-acid and hydrolysis-product values help maintain correct reaction stoichiometry and reduce side reactions.

Benzoyl Chloride CAS 98-88-4

Benzoyl Chloride (CAS 98-88-4), also known as benzenecarbonyl chloride, is an aromatic acyl chloride used as a benzoylation agent to introduce the benzoyl group into alcohols, amines and aromatic compounds, mainly for benzoyl peroxide, benzophenone, dye and pharmaceutical synthesis. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 98-88-4
Synonyms: Benzenecarbonyl chloride, Benzoic acid chloride, Phenylcarbonyl chloride, Benzoylchloride
Einecs: 202-710-8
Molecular Formula: C₇H₅ClO
Grade: Industrial grade 99%
Package: 200kg iron drum or 50kg plastic drum packing

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Product Description

Benzoyl Chloride, CAS 98-88-4, is benzenecarbonyl chloride, an aromatic acyl chloride used as a benzoylation agent; the EC/EINECS number is 202-710-8.

Synonyms: Benzenecarbonyl chloride; Benzoic acid chloride; Phenylcarbonyl chloride; Benzoyl chloride.

CAS: 98-88-4.

Molecular formula: C₇H₅ClO.

Molecular weight: 140.57.

EC number: 202-710-8.

It is a colorless to pale-yellow fuming liquid with a pungent odor; the melting point is about -1 °C, the boiling point about 197 °C and the density about 1.22 g/cm³.

It reacts with water and alcohols, releasing hydrogen chloride and forming benzoic acid or benzoate esters.

It is produced by chlorination of benzaldehyde or related routes.

It is used as a benzoylation agent to introduce the benzoyl group into alcohols, amines and aromatic compounds.

It is a key feedstock for benzoyl peroxide, benzophenone derivatives, dyes and pharmaceutical intermediates.

It is used in fragrances, resins and coatings.

Confirm assay, free acid, hydrolyzable chloride, color and related aromatic impurities.

Store in tightly sealed, corrosion-resistant packaging under dry, cool, ventilated conditions away from water, alcohols, amines and strong bases; use ventilation and suitable PPE.

Confirm the current product-specific specification.

Confirm packaging with the requested quantity and destination requirements.

Document requirements should be confirmed from the current specification, SDS, COA, or other product-specific files.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended use, required specification, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is Benzoyl Chloride?

A: Benzoyl chloride is an aromatic acyl chloride with CAS 98-88-4 and molecular formula C₇H₅ClO. It is a colorless to weakly yellow fuming liquid that reacts with moisture and alcohols.
Q:
What is Benzoyl Chloride used for?

A: It is mainly used as a benzoylation reagent in organic synthesis. Key downstream products include benzoyl peroxide, dyes, pigments, fragrances, pharmaceuticals, resins, coatings and agrochemical intermediates.
Q:
Why is benzoyl chloride important in polymer chemistry?

A: It is a key feedstock for benzoyl peroxide, a widely used radical initiator for polymerization and curing. The acyl chloride group allows controlled introduction of the benzoyl group into peroxides and other functional molecules.
Q:
What specifications should be checked when ordering?

A: Confirm assay, free acid, hydrolyzable chloride, color and related aromatic impurities. Low free-acid and hydrolysis-product values help maintain correct reaction stoichiometry and reduce side reactions.
Q:
How should Benzoyl Chloride be stored and handled?

A: Keep it in tightly sealed, corrosion-resistant packaging under dry, cool and ventilated conditions, away from water, alcohols, amines and strong bases. Use appropriate ventilation and PPE, and prevent moisture ingress during transfer.

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