o-Phenylphenol is an organic chemical compound from the group of biphenyl derivatives (monohydroxylated derivative).
Systematic name
[1,1´-Biphenyl]-2-ol
Other names, synonyms
Biphenyl-2-ol; Orthophenyl phenol
Abbreviation
OPP
INCI name
O-PHENYLPHENOL
Trade names; preparations
Dowicide; Torsite; Fungal; Preventol; Nipacide; Manusept; NECTRYL; Nipacide OPP; o-Xonal; Remol TRF; Stellisept; Tetrosin OE
Molecular formula and structural formula of 2-Phenylphenol:
C12H10O
Mr = 170.211 g/mol
[1,1´-Biphenyl]-2-ol
SMILES: C1=CC=C(C=C1)C2=CC=CC=C2O
o-Phenylphenol, in its pure state, is a white to pink solid with a phenol-like odor.
Calculated NMR spectrum (Predict Spectra via NMRDB)
1H NMR Spektrum, 13C NMR Spektrum.
Mass-related elemental composition and isotope proportions of the compound 2-Phenylphenol - C12H10O - calculated based on molecular mass.
*) The third column lists the atomic masses or isotope masses of the elements involved and - in square brackets - the natural isotope composition.
The molar mass is M = 170.211 grams per mole.
The amount of substance in one kilogram of the substance is n = 5.875 mol.
The amount of substance in one gram of the substance is n = 0.006 mol.
Monoisotopic mass: 170.073164941 Da - related to 12C121H1016O.
ATC Code:D08AE06
D08AE56
o-Phenylphenol, under the name Biphenylol, is used in antiseptics and disinfectants - also in combination with other active ingredients.
For detailed information on the active ingredient, see: DrugBank DB13734.
E-Nummer: E231 (deleted)
2-Phenylphenol is used as a biocide or preservative in food. This use is not permitted in the EU (formerly E-number E 231).
INCI Name: O-PHENYLPHENOL
EU-approved ingredient in cosmetic products used as a preservative. Caution: Avoid contact with eyes! For the use of o-phenylphenol as a preservative in cosmetics, a maximum concentration of 0.15% (as phenol) applies in leave-on products and 0.2% (as phenol) in rinse-off products.
Source: CosIng (Cosmetic Ingredient Database) number: 35733.
o-Phenylphenol is - like sodium 2-biphenylate - a fungicide used in agriculture - e.g. in the growth of citrus fruits or for disinfecting seed trays.
Status der EU-Zulassung: Siehe EU Pestizid-Datenbank ID 1013.
(General information without guarantee of accuracy and completeness! The information does not replace the chemical safety data sheet or a risk assessment, but rather provides a general overview of the risk posed by the hazardous substance.
Signal word: Warning
GHS hazard statements (H phrases):
LD50 (rat, oral): 2000 mg/kg.
Labeling in the EU: See ECHA Substance Infocard 100.001.812.
For toxicology and occupational safety when handling 2-Phenylphenol as well as measures to be taken in case of danger, see: Hazardous Substances Information System GESTIS, ZVG-Nr. 020480.
International Chemical Safety Card ICSC (SDS, MSDS): See ICSC: 0669.
Note: The labeling requirement according to the CLP Regulation (EU) does not apply, among other things, to certain substances and mixtures for end users that are in the form of finished products, such as pharmaceuticals, veterinary drugs, cosmetics, certain medical products and medical devices, food or feed, as well as certain Food additives or flavorings. Special legal regulations may need to be adhered to here.
The table below lists producers and suppliers of 2-Phenylphenol as a commercial chemical for laboratories, research, industry and production with the corresponding contact details.
[0] - Specialist and research articles in scientific journals via PubMed: 2-Phenylphenol.
Last update: 2026-02-03
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