Butane-1-thiol

{{Short description|Organosulfur compound (C4H9SH)}}

{{chembox

| Watchedfields = changed

| verifiedrevid = 443492557

| Reference = Merck Index, 12th Edition, 1611.

| ImageFile = 1-Butanethiol.svg

| ImageSize = 180px

| ImageName = Skeletal formula

| ImageFile1 = 1-Butanethiol-3D-balls.png

| ImageName1 = Ball-and-stick model

| ImageFile2 = 1-Butanethiol-3D-sticks-by-AHRLS-2012.png

| ImageName2 = 3D-stick model

| PIN = Butane-1-thiol

| OtherNames = Butyl mercaptan
n-Butyl mercaptan
Thiobutyl alcohol
Mercaptobutane
n-Butanethiol
1-Mercaptobutane

|Section1={{Chembox Identifiers

| Abbreviations =

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 7721

| InChIKey = WQAQPCDUOCURKW-UHFFFAOYAG

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChI = 1S/C4H10S/c1-2-3-4-5/h5H,2-4H2,1H3

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = WQAQPCDUOCURKW-UHFFFAOYSA-N

| CASNo_Ref = {{cascite|correct|CAS}}

| CASNo = 109-79-5

| EINECS =

| PubChem = 8012

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = 77OY909F30

| SMILES = SCCCC

| InChI = 1/C4H10S/c1-2-3-4-5/h5H,2-4H2,1H3

}}

|Section2={{Chembox Properties

| C=4 | H=10 | S=1

| Appearance = colorless liquid

| Odor = cabbage-like, skunk-like, garlic-like

| Density = 0.83679 g/mL

| MeltingPtC = -115.8

| MeltingPt_notes =

| BoilingPtC = 98.2

| BoilingPt_notes =

| Solubility = Slightly soluble (0.06% at 20°C)

| SolubleOther =

| Solvent =

| pKa =

| VaporPressure = 35 mmHg (20°C)

}}

|Section7={{Chembox Hazards

| MainHazards =

| NFPA-H = 2

| NFPA-F = 3

| NFPA-R = 0

| NFPA-S =

| FlashPtF = 35

| FlashPt_ref=

| AutoignitionPt =

| ExploLimits =

| PEL = TWA 10 ppm (35 mg/m³){{PGCH|0083}}

| IDLH = 500 ppm

| REL = C 0.5 ppm (1.8 mg/m³) [15-minute]

| LC50 = 4020 ppm (rat, 4 hr)
2500 ppm (mouse, 4 hr)
770 ppm (dog, 30 min){{IDLH|109795| n-Butyl mercaptan}}

}}

}}

Butane-1-thiol, also known as butyl mercaptan, is an organosulfur compound with the formula {{chem2|CH3CH2CH2CH2SH}}. It is classified as a thiol. It is a volatile, colorless liquid with a fetid (extremely foul-smelling) odor, commonly described as "skunk" odor. In fact, 1-butanethiol is structurally similar to several constituents of a skunk's defensive spray but is not present in the spray.{{cite journal |journal=Journal of Chemical Education |volume= 55 |issue= 3 |year= 1978 |title=1-Butanethiol and the Striped Skunk |author= Andersen K. K., Bernstein D. T. |doi=10.1021/ed055p159|pages = 159–160 |bibcode= 1978JChEd..55..159A }} The scent of 1-butanethiol is so strong that the human nose can easily detect it in the air at concentrations as low as 10 parts per billion. The threshold level for 1-butanethiol is reported as 1.4 ppb{{cite book|last=Devos|first=M|title=Standardized Human Olfactory Thresholds|year=1990|publisher=IRL Press|location=Oxford|isbn=0199631468|pages=34|author2=F. Patte |author3=J. Rouault |author4=P. Lafort |author5=L. J. Van Gemert}}