Benzoyl Chloride CAS No. 98-88-4

Benzoyl Chloride 

CAS No.: 98-88-4 | EC No.: 202-710-8

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1. Chemical Identification

Property	Specification
IUPAC Name	Benzoyl chloride
Molecular Formula	C₇H₅ClO
Molecular Weight	140.56 g/mol
Appearance	Clear colorless to pale yellow liquid
Density	1.211 g/mL at 25°C
Melting Point	-1°C
Boiling Point	197-198°C
Refractive Index	n<sup>20</sup><sub>D</sub> 1.553
Flash Point	72°C (closed cup)

Synonyms:
Benzenecarbonyl chloride, Benzoic acid chloride

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2. Key Applications

Polymer Industry

Primary Use: Production of benzoyl peroxide (BPO) – widely used as:
✓ Polymerization initiator (PVC, polystyrene)
✓ Catalyst for polyester/epoxy resins
✓ Cross-linking agent for silicone rubber

Agrochemicals

Herbicide Intermediate: Chlorphenazine synthesisInsecticide Production: Fenamide & hydrazine derivatives

Chemical Synthesis

Versatile Reagent for:
✓ Benzoylation reactions
✓ Manufacturing benzophenone, benzyl benzoate
✓ Pharmaceutical intermediates

Other Uses

Flour/fiber bleaching agentGlass fiber coagulant

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3. Product Advantages

✔ High Reactivity – Effective benzoylating agent
✔ Process Flexibility – Compatible with multiple synthesis routes
✔ Industry Standard – Proven performance in polymer production

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4. Physical & Chemical Properties

Solubility:Reacts with water/alcoholsMiscible with ether, benzeneVapor Pressure: 0.36 mmHg at 25°CStability: Moisture-sensitive – store under anhydrous conditions

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5. Handling & Storage

Parameter	Requirement
Storage Temp	2-8°C (refrigerated recommended)
Packaging	25kg polyethylene-coated drums
Shelf Life	12 months
Special Notes	Argon blanket recommended

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6. Safety Information

Danger!

H314: Causes severe skin burns/eye damageH335: May cause respiratory irritationH290: May be corrosive to metals

Protective Measures:

P280: Wear acid-resistant gloves/face shieldP303+P361+P353: Skin contact wash procedureP305+P351+P338: Eye contact rinse protocol

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7. Quality Specifications

Purity: ≥99.0% (GC)Free Acid (as HCl): ≤0.5%Water Content: ≤0.1%

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Disclaimer:
This information is for professional use only. Handling requires fume hood and corrosion-resistant equipment. Users must comply with local regulations for hazardous chemicals.

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