Pentachlorobenzene
CAS 608-93-5
EC 210-172-0
Formula C6HCl5
MW 250.34 g/mol
Organometallic Compounds Agriculture & FeedPharmaceuticals & Healthcare Preservation & Biocide
Description
Pentachlorobenzene (CAS 608-93-5, EC 210-172-0), also known by the abbreviation QCB and the synonyms NSC 1857 and Benzene pentachloro-, is a fully chlorinated benzene derivative with the molecular formula C6HCl5. It carries no assigned E-code and is classified within the agrochemical category.
In agricultural and pharmaceutical research contexts, pentachlorobenzene functions as a biocidal and preservative agent, acting by disrupting cellular membrane integrity in target organisms. It has been investigated as a fungicide intermediate and as a reference standard compound in analytical and formulation chemistry workflows requiring a stable, well-characterized chlorinated aromatic.
Pentachlorobenzene is supplied as a neat crystalline solid and is subject to REACH regulation within the European Union, where it is listed as a substance of very high concern due to its persistent and bioaccumulative profile. Procurement teams should confirm applicable authorization requirements and packaging specifications, which vary by order volume and jurisdiction, prior to purchase.
In agricultural and pharmaceutical research contexts, pentachlorobenzene functions as a biocidal and preservative agent, acting by disrupting cellular membrane integrity in target organisms. It has been investigated as a fungicide intermediate and as a reference standard compound in analytical and formulation chemistry workflows requiring a stable, well-characterized chlorinated aromatic.
Pentachlorobenzene is supplied as a neat crystalline solid and is subject to REACH regulation within the European Union, where it is listed as a substance of very high concern due to its persistent and bioaccumulative profile. Procurement teams should confirm applicable authorization requirements and packaging specifications, which vary by order volume and jurisdiction, prior to purchase.
Physical Properties
| 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) |
Trade & Regulatory
| UN Number | 3077 |
| ADR Class | 9 |
| Packing Group | III |
| Storage Class | 4.1B - Flammable solid hazardous materials |
| WGK (Germany) | 3 |
Other Names
QCBpentachloro-benzenrcrawastenumberu183Benzene, pentachloro-Rcra waste number U183PENTACHLORBENZOL PESTANAL2,3,4,5,6-Pentachlorobenzene
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