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IUPAC name 2-phenylphenol
Other names o-phenylphenol
orthophenyl phenol
CAS number 90-43-7
Molecular formula C12H10O
Molar mass 170.21 g/mol
Density 1.293 g/cm³
Melting point

55.5-57.5 °C

Boiling point

280-284 °C

Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

2-Phenylphenol, or o-phenylphenol, is an organic compound that consists of two linked benzene rings and a phenolic hydroxyl group. It is a white or buff-colored, flaky crystalline solid with a melting point of about 57 °C. It is a biocide used as a preservative under the trade names Dowicide, Torsite, Preventol, Nipacide and many others.


The primary use of 2-phenylphenol is as an agricultural fungicide. It is generally applied post-harvest. It is a fungicide used for waxing citrus fruits. As a food additive, it has E number E231.

It is also used for disinfection of seed boxes. It is a general surface disinfectant, used in households, hospitals, nursing homes, farms, laundries, barber shops, and food processing plants. It can be used on fibers and other materials. It is used to sterilize hospital and veterinary equipment. Other uses are in rubber industry and as a laboratory reagent. It is also used in the manufacture of other fungicides, dye stuffs, resins and rubber chemicals.

2-Phenylphenol is found in low concentrations in some household products such as spray disinfectants and aerosol or spray underarm deodorants.

Eye contact can cause severe irritation and burns with possible eye damage. For some individuals, 2-phenylphenol can also irritate the skin. It is one of the chemicals that the Hyperactive Children's Support Group recommends be eliminated from the diet of children.

The sodium salt of orthophenyl phenol, sodium orthophenyl phenol, is a preservative, used to treat the surface of citrus fruits to prolong shelf life. As a food additive, it has the E number E232.


    • Merck Index, 12th Edition, 7458.
    • Hazardous Substance Fact Sheet
    This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "2-Phenylphenol". A list of authors is available in Wikipedia.
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