Editing Methanethiol (section)

{{Short description|Chemical compound (CH
3SH)}}
{{chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 444011638
| Name = Methanethiol
| ImageFile_Ref = {{chemboximage|correct|??}}
| ImageFile = Methanethiol.svg
| ImageSize = 150px
| ImageName = Methanethiol
| ImageFileL1 = Methanethiol-3D-balls.png
| ImageNameL1 = Ball-and-stick model of the methanethiol molecule
| ImageFileR1 = Methanethiol-3D-vdW.png
| ImageNameR1 = Space-filling model of the methanethiol molecule
| PIN = Methanethiol
| OtherNames = Methyl mercaptan<br />Mercaptomethane<br />Methiol<br />Thiomethyl alcohol/Thiomethanol<br />Methylthiol
|Section1={{Chembox Identifiers
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspiders}}
| ChemSpiderID = 855
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = 2X8406WW9I
| KEGG_Ref = {{keggcite|correct|kegg}}
| KEGG = C00409
| PubChem = 878
| InChI = 1/CH3SH/c1-2/h2H,1H3
| InChIKey = LSDPWZHWYPCBBB-UHFFFAOYAW
| StdInChI_Ref = {{stdinchicite|changed|chemspider}}
| StdInChI = 1S/CH3SH/c1-2/h2H,1H3
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = LSDPWZHWYPCBBB-UHFFFAOYSA-N
| CASNo = 74-93-1
| CASNo_Ref = {{cascite|correct|CAS}}
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 16007
| DTXSID = DTXSID5026382
| RTECS = PB4375000
| UNNumber = 1064
| EINECS = 200-822-1
| 3DMet = B00105
| SMILES = SC
}}
|Section2={{Chembox Properties
| Formula = CH<sub>3</sub>SH
| MolarMass = 48.11&nbsp;g·mol<sup>&minus;1</sup>
| Appearance = colorless gas<ref name=PGCH/>
| Odor = Distinctive, like that of rotten cabbage or eggs 
| MeltingPtC = -123
| BoilingPtC = 5.95
| Solubility = 2%
| Solvent =
| SolubleOther = alcohol, ether
| pKa = ~10.4
| VaporPressure = 1.7 atm (20°C)<ref name=PGCH/>
| Density = 0.9 g/mL (liquid at 0°C)<ref name=PGCH/>
  }}
|Section3={{Chembox Hazards
| GHSPictograms = {{GHS02}}{{GHS06}}{{GHS08}}{{GHS09}}
| GHSSignalWord = Danger
| HPhrases = {{H-phrases|220|331|410}}
| PPhrases = {{P-phrases|210|261|271|273|304+340|311|321|377|381|391|403|403+233|405|501}}
| NFPA-H = 4
| NFPA-F = 4
| NFPA-R = 1
| IDLH = 150 ppm<ref name=PGCH>{{PGCH|0425}}</ref>
| LC50 = 3.3 ppm (mouse, 2 hr)<br/>675 ppm (rat, 4 hr)<ref name=IDLH>{{IDLH|74931|Methyl mercaptan}}</ref>
| LD50 = 60.67 mg/kg (mammal)<ref name=IDLH/>| PEL = C 10 ppm (20 mg/m<sup>3</sup>)<ref name=PGCH/>
| REL = C 0.5 ppm (1 mg/m<sup>3</sup>) [15-minute]<ref name=PGCH/>
| FlashPtF = 0
| FlashPt_ref = <ref name=PGCH/>
| AutoignitionPtF = 687
| AutoignitionPt_ref = <ref>{{cite web |title=Sigma Aldrich Methanethiol SDS |url=https://www.sigmaaldrich.com/US/en/sds/aldrich/742805 | website=Sigma Aldrich |publisher=Millipore Sigma |access-date=Nov 1, 2022}}</ref>
| ExploLimits = 3.9%–21.8%<ref name=PGCH/>  }}
|Section4={{Chembox Related
| OtherCompounds = [[Ethanethiol]] 
[[Hydrogen sulfide]]
  }}
}}

'''Methanethiol''' {{IPAc-en|ˌ|m|ɛ|θ|.|eɪ|n|.|ˈ|θ|aɪ|.|ɒ|l}} {{respell|METH|eyn|THY|ol}} (also known as '''methyl mercaptan''') is an [[organosulfur compound]] with the [[chemical formula]] {{chem2|CH3SH}}. It is a colorless gas with a distinctive putrid smell. In small amounts, it is pervasive in nature and found in certain foods, such as some [[nut (fruit)|nuts]] and [[cheese]]. It contributes to many odors including the emissions from [[pulp mill]]s, [[halitosis|bad breath]], and [[flatus]]. Methanethiol is the simplest [[thiol]] and is sometimes abbreviated as '''MeSH'''. It is flammable.