Pentachlorobenzene

CAS Number
608-93-5
EC Number
210-172-0

What is Pentachlorobenzene?

Pentachlorobenzene (CAS 608-93-5) is a fully chlorinated aromatic compound used industrially as a biocide and chemical intermediate. Also known as QCB.

Where is Pentachlorobenzene used?

  • Industrial preservation: preservative and antimicrobial agent in controlled applications
  • Agricultural chemistry: fungicide intermediate in synthesis of active ingredients targeting soil-borne pathogens in crop protection
  • Pharmaceutical manufacturing: synthetic building block for chlorinated aromatic intermediates used in API production
  • Research and reference standards: certified analytical grades for environmental monitoring and residue testing
  • Regulatory and quality laboratories use it as a calibration reference for pesticide residue analysis in food and environmental matrices.

Good to know: Bulk formats for industrial procurement are subject to applicable regulatory controls in the buyer's jurisdiction.

Commercial specifications

  • High-purity analytical reference grades meeting certified standard specifications
  • Packaging in small quantities and bulk formats

Other Names (Synonyms)

1,2,3,4,5-Pentachlorobenzene|PCB|Benzene, pentachloro-|D62GWO6832|Benzene, 1,2,3,4,5-pentachloro-|QCB

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What are the physical properties of Pentachlorobenzene?

Melting Point 86 °C
Boiling Point 277 °C
Density 1.8342 g/cm³ @ Temp: 16.5 °C
Appearance Pentachlorobenzene is a colorless crystalline solid. Pleasant aroma.
Color White needles
Form neat
Water Solubility 1.332mg/L(25 ºC)
Vapor Pressure 6 x 10 -3 mmHg at 20–30 °C (quoted, Mercer et al., 1990)
Refractive Index 1.5522 (estimate)

How is Pentachlorobenzene classified and handled safely? Learn More

Danger
GHS02· Flammable GHS07· Irritant GHS09· Environmental Hazard GHS08· Health Hazard

Hazard Statements

H228 Flammable solid [Danger Flammable solids]
H302 Harmful if swallowed [Warning Acute toxicity, oral]
H400 Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
H410 Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]

Which trade and regulatory codes apply to Pentachlorobenzene?

UN Number 3077
ADR Class 9
Packing Group III
Storage Class 4.1B - Flammable solid hazardous materials
WGK (Germany) 3
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