Colorless, crystalline powder that was made by the chlorination of phenol. Pentachlorophenol (PCP) was used as a fungicide, bactericide, and algicide. It was used commercially for the preservation of wood, paper, starch, dextrin, and glue. When tested as a potential fungicide in a closed container, PCP produced enough chloride hydrogen chloride to corrode iron fasteners within 24 hours. The sodium salt, sodium pentachlorophenate or PCPNa (Santobrite and Dowicide G), is sometimes used as a replacement to minimize acid formation. Some objects (paper, textiles, leather, and historic wood buildings) may still contain toxic levels of PCP due to its wide use prior to 1987 when its use in the U.S. was banned.
Synonyms and Related Terms
PCP; Penta; penchlorol; pentachlorphenol; Santophen 20 [Monsanto]; Santobrite (PCPNa) [Monsanto]; Dowicide EC7 [Dow Chemical]; Dowicide G (PCPNa) [Dow Chemical]; Weedone
Needle-like crystals. Soluble in dilute alkali, ethanol, ether, benzene. Slightly soluble in water.
|Molecular Weight||mol. wt.=266.4|
Hazards and Safety
Toxic by ingestion, inhalation and skin absorption. LD50 = 146=175 mg/kg
Can corrode metals. May discolor wood, textiles, and pigments.
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