Cresol

Isomers of Cresol[1][2][3][4]
Skeletal formula
Ball-and-stick model
General
Common name	o-cresol	m-cresol	p-cresol
Preferred IUPAC name	2-methylphenol	3-methylphenol	4-methylphenol
Systematic name	2-methylbenzenol	3-methylbenzenol	4-methylbenzenol
Other names	ortho-cresol 2-hydroxytoluene	meta-cresol 3-hydroxytoluene	para-cresol 4-hydroxytoluene
Molecular formula	C7H8O
SMILES	oc1c(C)cccc1	oc1cc(C)ccc1	oc1ccc(C)cc1
Molar mass	108.14 g/mol
Appearance at room temperature and pressure	colorless crystals	thicker liquid	greasy-looking solid
CAS number	[95-48-7]	[108-39-4]	[106-44-5]
	mixture of cresols (tricresol): [1319-77-3]
Properties
Density and phase	1.05 g/cm3, solid	1.03 g/cm3, liquid	1.02 g/cm3, liquid
Solubility in pure water at 20−25 °C	2.5 g/100 ml	2.4 g/100 ml	1.9 g/100 ml
soluble in strongly alkaline water
Melting point	29.8 °C (303.0 K)	11.8 °C (285.0 K)	35.5 °C (309.7 K)
Boiling point	191.0 °C (464.2 K)	202.0 °C (475.2 K)	201.9 °C (475.1 K)
Acidity (pKa)	10.287	10.09	10.26
Viscosity	solid at 25 °C	? cP at 25 °C	solid at 25 °C
Structure
Dipole moment	1.35 D	1.61 D	1.58 D
Hazards
SDS
Main hazards	flammable, ingestion and inhalation toxicity hazard
Flash point	81 °C c.c.	86 °C	86 °C c.c.
GHS pictograms
RTECS number	GO6300000	GO6125000	GO6475000
Related compounds
Related phenols	xylenols
Related compounds	bromocresol green, cresol red
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Cresols (also known as hydroxytoluene, toluenol, benzol or cresylic acid) are a group of aromatic organic compounds. They are widely-occurring phenols (sometimes called phenolics) which may be either natural or manufactured. They are also categorized as methyl phenols. Cresols commonly occur as either solids or liquids because their melting points are generally close to room temperature. Like other types of phenols, they are slowly oxidized by exposure to air, and the resulting impurities often give the samples a yellow to brownish red tint. Cresols have an odor characteristic to that of other simple phenols, reminiscent to some of a "coal tar" smell. The name "cresol" is an adduct of phenol and their traditional source, creosote.