Editing Cresol (section)

{{short description|Group of chemical compounds}}
{{distinguish|creosol}}
{| align="right" border="1" cellspacing="0" cellpadding="3" style="margin: 0 0 0 0.5em; background: #FFFFFF; border-collapse: collapse; border-color: #C0C090;"
! {{Chemical datatable header}}  align="center" colspan="4" | Isomers of Cresol<ref>[http://www.inchem.org/documents/icsc/icsc/eics0030.htm o-CRESOL (ICSC)]</ref><ref>[http://www.inchem.org/documents/icsc/icsc/eics0646.htm m-CRESOL (ICSC)]</ref><ref>[http://www.inchem.org/documents/icsc/icsc/eics0031.htm p-CRESOL (ICSC)]</ref><ref>{{Cite web|url=https://pubchem.ncbi.nlm.nih.gov/compound/o-cresol#section=Odor-Threshold|title=o-cresol|last=Pubchem|website=pubchem.ncbi.nlm.nih.gov|language=en|access-date=2018-01-16}}</ref>
|-
| [[Skeletal formula]]
| [[file:O-Kresol.svg|90px|center]]
| [[file:M-Kresol.svg|90px|center]]
| [[file:P-Kresol.svg|45px|center]]
|-
| [[Ball-and-stick model]]
| [[Image:Ortho-cresol-3D-balls.png|100px]]
| [[Image:Meta-cresol-3D-balls.png|100px]]
| [[Image:Para-cresol-3D-balls.png|100px]]
|-
! {{Chemical datatable header}} align="center" colspan="4" | General
|-
| Common name
| '''[[o-cresol|''o''-cresol]]'''
| '''[[m-cresol|''m''-cresol]]'''
| '''[[p-cresol|''p''-creso]]l'''
|-
| [[Preferred IUPAC name]]
| 2-methylphenol
| 3-methylphenol
| 4-methylphenol
|-
| [[Chemical nomenclature#Systematic name|Systematic name]]
| 2-methylbenzenol
| 3-methylbenzenol
| 4-methylbenzenol
|-
| Other names
| ''ortho''-cresol<br />2-hydroxytoluene
| ''meta''-cresol<br />3-hydroxytoluene
| ''para''-cresol<br />4-hydroxytoluene
|-
| [[Chemical formula|Molecular formula]]
| align="center" colspan="4" |  C<sub>7</sub>H<sub>8</sub>O
|-
| [[Simplified molecular input line entry specification|SMILES]]
| oc1c(C)cccc1
| oc1cc(C)ccc1
| oc1ccc(C)cc1
|-
| [[Molar mass]]
| align="center" colspan="4" |  108.14 g/mol
|-
| Appearance at room<br /> temperature and pressure
|  colorless crystals
|  thicker liquid
|  greasy-looking solid
|-
|rowspan="2" | [[CAS registry number|CAS number]]
| <nowiki>[95-48-7]</nowiki>
| <nowiki>[108-39-4]</nowiki>
| <nowiki>[106-44-5]</nowiki>
|-
| align="center" colspan="3" | mixture of cresols (tricresol): <nowiki>[1319-77-3]</nowiki>
|-
! {{Chemical datatable header}} align="center" colspan="4" | Properties
|-
| [[Density]] and [[Phase (matter)|phase]]
| 1.05 g/cm<sup>3</sup>, solid
| 1.03 g/cm<sup>3</sup>, liquid
| 1.02 g/cm<sup>3</sup>, liquid
|-
| [[Soluble|Solubility]] in [[Water (molecule)|pure water]]<br /> at 20−25&nbsp;°C
| 2.5 g/100 ml
| 2.4 g/100 ml
| 1.9 g/100 ml
|-
| align="center" colspan="4" | soluble in strongly [[alkaline]] water
|-
<!-- | Other solvents e.g. [[ethanol]], [[acetone]] -->
<!-- | solubility info on other solvents -->
<!-- |- -->
| [[Melting point]]
|  29.8&nbsp;°C (303.0 K)
|  11.8&nbsp;°C (285.0 K)
|  35.5&nbsp;°C (309.7 K)
|-
| [[Boiling point]]
| 191.0&nbsp;°C (464.2 K)
| 202.0&nbsp;°C (475.2 K)
| 201.9&nbsp;°C (475.1 K)
|-
| [[Acid dissociation constant|Acidity]] (p''K''<sub>a</sub>) <!-- omit if not an acid or a base.  If several values, be clear -->
| 10.287
| 10.09
| 10.26
|-
| [[Viscosity]]
| solid at 25&nbsp;°C
| ? c[[Poise (unit)|P]] at 25&nbsp;°C
| solid at 25&nbsp;°C
|-

! {{Chemical datatable header}} align="center" colspan="4" | Structure
|-
| [[Dipole#Molecular dipoles|Dipole moment]]
| 1.35 [[Debye|D]]
| 1.61 [[Debye|D]]
| 1.58 [[Debye|D]]
|-

! {{Chemical datatable header}} align="center" colspan="4" | Hazards <!--  Summary only- MSDS entry provides more complete information -->
|-
| [[Safety data sheet|SDS]]
| <!--[[Cresol chemdata supplement#Material Safety Data Sheet|External MSDS]]  please replace with proper link-->
|
|
|-
| Main [[Worker safety and health|hazard]]s
| align="center" colspan="4" |  [[flammable]], ingestion and inhalation toxicity hazard
|-
| [[Flash point]]
| 81&nbsp;°C c.c.
| 86&nbsp;°C
| 86&nbsp;°C c.c.
|-
| [[GHS pictograms]]
| align="center" colspan="4" |  {{GHS05}}{{GHS06}}
|-
| [[RTECS]] number
| GO6300000
| GO6125000
| GO6475000
|-
! {{Chemical datatable header}} align="center" colspan="4" | Related compounds
|-
| Related [[phenols]]
| colspan="3"| [[xylenol]]s
|-
| Related compounds
| colspan="3"| [[bromocresol green]], [[cresol red]]
|-
| {{Chemical datatable header}} align="center" colspan="4" | <small>Except where noted otherwise, data are given for<br /> materials in their [[standard state|standard state (at 25&nbsp;°C, 100 kPa)]]<br />[[wikipedia:Chemical infobox|Infobox disclaimer and references]]</small>
|-
|}

'''Cresols''' (also known as '''hydroxytoluene''', '''toluenol''', '''benzol''' or '''cresylic acid''') are a group of [[aromatic]] [[organic compound]]s. They are widely-occurring [[phenols]] (sometimes called ''phenolics'') which may be either natural or manufactured. They are also categorized as '''[[methyl group|methyl]] [[phenol]]s'''. Cresols commonly occur as either solids or liquids because their [[melting point]]s are generally close to room temperature. Like other types of phenols, they are slowly [[oxidation|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]].