Methanethiol

• Formula: CH₄S
• Molecular weight: 48.107
• IUPAC Standard InChI: InChI=1S/CH4S/c1-2/h2H,1H3 Copy

  
• IUPAC Standard InChIKey: LSDPWZHWYPCBBB-UHFFFAOYSA-N Copy
• CAS Registry Number: 74-93-1
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Methyl mercaptan; Mercaptomethane; CH3SH; Methyl sulfhydrate; Methyl thioalcohol; Mercaptan methylique; Methaanthiol; Methanthiol; Methvtiolo; Methylmercaptaan; Metilmercaptano; Rcra waste number U153; Thiomethanol; UN 1064; Methanethiole
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• Information on this page:
  • Condensed phase thermochemistry data
  • Henry's Law data
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Gas Chromatography
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Ion clustering data
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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Condensed phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

Henry's Law data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Rolf Sander

Henry's Law constant (water solution)

k_H(T) = k°_H exp(d(ln(k_H))/d(1/T) ((1/T) - 1/(298.15 K)))
k°_H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(k_H))/d(1/T) = Temperature dependence constant (K)

Mass spectrum (electron ionization)

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

UV/Visible spectrum

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Victor Talrose, Alexander N. Yermakov, Alexy A. Usov, Antonina A. Goncharova, Axlexander N. Leskin, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

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Additional Data

Gas Chromatography

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Kovats' RI, non-polar column, isothermal

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Van Den Dool and Kratz RI, non-polar column, custom temperature program

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Van Den Dool and Kratz RI, polar column, temperature ramp

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Van Den Dool and Kratz RI, polar column, custom temperature program

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Normal alkane RI, non-polar column, temperature ramp

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Normal alkane RI, non-polar column, custom temperature program

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Normal alkane RI, polar column, temperature ramp

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Normal alkane RI, polar column, custom temperature program

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References

Go To: Top, Condensed phase thermochemistry data, Henry's Law data, Mass spectrum (electron ionization), UV/Visible spectrum, Gas Chromatography, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Good, Lacina, et al., 1961
Good, W.D.; Lacina, J.L.; McCullough, J.P., Methanethiol and carbon disulfide: Heats of combustion and formation by rotating-bomb calorimetry, J. Phys. Chem., 1961, 65, 2229-2231. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Russell, Osborne, et al., 1942
Russell, H., Jr.; Osborne, D.W.; Yost, D.M., The heat capacity, entropy, heats of fusion, transition, and vaporization and vapor pressures of methyl mercaptan, J. Am. Chem. Soc., 1942, 64, 165-169. [all data]

Bol'shakov, et al., 1969
Bol'shakov, G.F., et al., Ultraviolet spectra of heteroorganic compounds, 1969, 83. [all data]

Rudenko, Mal'tsev, et al., 1985
Rudenko, G.I.; Mal'tsev, V.V.; Studenichnik, V.N.; Ustinov, E.P., Gas chromatographic analysis of volatile substances evolved into atmosphere from polymer materials, Zh. Anal. Khim., 1985, 40, 6, 1119-1127. [all data]

Zygmunt and Staszewski, 1981
Zygmunt, B.; Staszewski, R., Retention index and gas chromatographic-mass spectrometric identification of thiols in liquified gas, Chem. Anal. (Warsaw), 1981, 26, 109-113. [all data]

Hively and Hinton, 1968
Hively, R.A.; Hinton, R.E., Variation of the retention index with temperature on squalane substrates, J. Gas Chromatogr., 1968, 6, 4, 203-217, https://doi.org/10.1093/chromsci/6.4.203 . [all data]

Bonaiti, Irlinger, et al., 2005
Bonaiti, C.; Irlinger, F.; Spinnler, H.E.; Engel, E., An iterative sensory procedure to select odor-active associations in complex consortia of microorganisms: application to the construction of a cheese model, J. Dairy Sci., 2005, 88, 5, 1671-1684, https://doi.org/10.3168/jds.S0022-0302(05)72839-3 . [all data]

Engel, Baty, et al., 2002
Engel, E.; Baty, C.; le Corre, D.; Souchon, I.; Martin, N., Flavor-active compounds potentially implicated in cooked cauliflower acceptance, J. Agric. Food Chem., 2002, 50, 22, 6459-6467, https://doi.org/10.1021/jf025579u . [all data]

Wu and Cadwallader, 2002
Wu, Y.-F.G.; Cadwallader, K.R., Characterization of the aroma of a meatlike process flavoring from soybean-based enzyme-hydrolyzed vegetable protein, J. Agric. Food Chem., 2002, 50, 10, 2900-2907, https://doi.org/10.1021/jf0114076 . [all data]

Majcher and Jelen, 2007
Majcher, M.A.; Jelen, H.H., Effect of Cysteine and Cystine Addition on Sensory Profile and Potent Odorants of Extruded Potato Snacks, J. Agric. Food Chem., 2007, 55, 14, 5754-5760, https://doi.org/10.1021/jf0703147 . [all data]

Majcher and Jelén, 2005
Majcher, M.A.; Jelén, H.H., Identification of potent odorants formed during the preparation of extruded potato snacks, J. Agric. Food Chem., 2005, 53, 16, 6432-6437, https://doi.org/10.1021/jf050412x . [all data]

Cais-Sokolinska, Majcher, et al., 2011
Cais-Sokolinska, D.; Majcher, M.; Pikul, J.; Bielinska, S.; Czauderma, M.; Wojtowski, J., The effect of Camelia sativa cake diet supplementation on sensory and volatile profiles of ewe's milk, African J. Biotechnol., 2011, 10, 37, 7245-7252. [all data]

Zenkevich, 2005
Zenkevich, I.G., Experimentally measured retention indices., 2005. [all data]

Yang, Wang, et al., 2004
Yang, Y.; Wang, Z.; Zong, B.; Yang, H., Determination of sulfur compounds in fluid catalytic cracking gasoline by gas chromatography with a sulfur chemiluminiscence detector, Chin. J. Chromatogr., 2004, 22, 3, 216-219. [all data]

Yang, Wang, et al., 2003
Yang, Y.-T.; Wang, Z.; Han. J.-H.; Tian, H.-P.; Yang, H.-Y., Determination of sulfur compounds in gasoline fraction of microreactor products by gas chromatography - Atomic emission detector, Petrochemical Technology (Shiyou Huagong), 2003, 32, 11, 995-998. [all data]

Hansen, Buttery, et al., 1992
Hansen, M.; Buttery, R.G.; Stern, D.J.; Cantwell, M.I.; Ling, L.C., Broccoli storage under low-oxygen atmosphere: Identification of higher boiling volatiles, J. Agric. Food Chem., 1992, 40, 5, 850-852, https://doi.org/10.1021/jf00017a029 . [all data]

Chantreau, Rochat, et al., 2006
Chantreau, A.; Rochat, S.; de Saint Laumer, J.-Y., Re-investigation of sulfur impact odorants in roast beef using comprehensive two-dimensional GC-TOF-MS and the GC-SNIF, Developments Food. Sci., 2006, 43, 601-604. [all data]

Zenkevich, 1998
Zenkevich, I.G., The Principle of Structural Analogy in the Calculation of Gas Chromatographic Retention Indices using Physico-Chemical Constants of Organic Compounds, Zh. Anal. Khim. (Rus.), 1998, 53, 1, 43-49. [all data]

Zenkevich and Chupalov, 1996
Zenkevich, I.G.; Chupalov, A.A., New Possibilities of Chromato Mass Pectrometric Identification of Organic Compounds Using Increments of Gas Chromatographic Retention Indices of Molecular Structural Fragments, Zh. Org. Khim. (Rus.), 1996, 32, 5, 656-666. [all data]

Nedjma and Maujean, 1995
Nedjma, M.; Maujean, A., Improved chromatographic analysis of volatile sulfur compounds by the static headspace technique on water-alcohol solutions and brandies with chemiluminescence detection, J. Chromatogr. A, 1995, 704, 2, 495-502, https://doi.org/10.1016/0021-9673(95)00218-C . [all data]

Kawai, Ishida, et al., 1991
Kawai, T.; Ishida, Y.; Kakiuchi, H.; Ikeda, N.; Higashida, T.; Nakamura, S., Flavor components of dried squid, J. Agric. Food Chem., 1991, 39, 4, 770-777, https://doi.org/10.1021/jf00004a031 . [all data]

Marin, Pozrl, et al., 2008
Marin, K.; Pozrl, T.; Zlatic, E.; Plestenjak, A., A new aroma index to determine the aroma quality of roasted and ground coffee during storage, Food Technol. Biotechnol., 2008, 46, 4, 442-447. [all data]

Senger-Emonnot, Rochard, et al., 2006
Senger-Emonnot, P.; Rochard, S.; Pellegrin, F.; George, G.; Fernandez, X.; Lizzani-Cuvelier, L., Odour active aroma compounds of sea fig (Microcosmus sulcatus), Food Chem., 2006, 97, 3, 465-471, https://doi.org/10.1016/j.foodchem.2005.05.026 . [all data]

Spadone, Matthey-Doret, et al., 2006
Spadone, J.-C.; Matthey-Doret, W.; Blank, I., Formation of methyl(methylthio)methyl disulfide in broccoli (Brassica oleracea (L.) var. italica) in Flavour Science: Recent Advances and Trends, Bredie, W.L.P.; Petersen, M.A., ed(s)., Elsevier, Amsterdam, 2006, 309-314. [all data]

Ishizaki, Tachihara, et al., 2005
Ishizaki, S.; Tachihara, T.; Tamura, H.; Yanai, T.; Kitahara, T., Evaluation of odour-active compounds in roasted shrimp (Sergia lucens Hansen) by aroma extract dilution analysis, Flavour Fragr. J., 2005, 20, 6, 562-566, https://doi.org/10.1002/ffj.1484 . [all data]

Ishikawa, Ito, et al., 2004
Ishikawa, M.; Ito, O.; Ishizaki, S.; Kurobayashi, Y.; Fujita, A., Solid-phase aroma concentrate extraction (SPACE ): a new headspace technique for more sensitive analysis of volatiles, Flavour Fragr. J., 2004, 19, 3, 183-187, https://doi.org/10.1002/ffj.1322 . [all data]

Kumazawa and Masuda, 2003
Kumazawa, K.; Masuda, H., Investigation of the change in the flavor of a coffee drink during heat processing, J. Agric. Food Chem., 2003, 51, 9, 2674-2678, https://doi.org/10.1021/jf021025f . [all data]

Cadwallader and Heo, 2001
Cadwallader, K.R.; Heo, J., Aroma of roasted sesame oil: characterization by direct thermal desorption-gas chromatography-olfactometry and sample dilution analysis, Am. Chem. Soc. Symp. Ser., 2001, 782, 187-202. [all data]

Girard and Durance, 2000
Girard, B.; Durance, T., Headspace volatiles of sockeye and pink salmon as affected by retort process, Food Chem. Toxicol., 2000, 65, 1, 34-39. [all data]

Schlüter, Steinhart, et al., 1999
Schlüter, S.; Steinhart, H.; Schwarz, F.J.; Kirchgessner, M., Changes in the odorants of boiled carp fillet (Cyprinus carpio L.) as affected by increasing methionine levels in feed, J. Agric. Food Chem., 1999, 47, 12, 5146-5150, https://doi.org/10.1021/jf9902604 . [all data]

Umano, Hagi, et al., 1995
Umano, K.; Hagi, Y.; Nakahara, K.; Shyoji, A.; Shibamoto, T., Volatile chemicals formed in the headspace of a heated D-glucose/L-cysteine Maillard model system, J. Agric. Food Chem., 1995, 43, 8, 2212-2218, https://doi.org/10.1021/jf00056a046 . [all data]

Kraft and Switt, 2005
Kraft, P.; Switt, K.A.D. (Eds), Perspectives in Flavor and Fragrance Research, Wiley-VCH, Weinheim, Germany, 2005, 251. [all data]

Tachihara, Ishizaki, et al., 2004
Tachihara, T.; Ishizaki, S.; Ishikawa, M.; Kitahara, T., Studies on the volatile compounds of roasted spotted shrimp, Chemistry Biodiversity, 2004, 1, 12, 2024-2033, https://doi.org/10.1002/cbdv.200490155 . [all data]

Notes

Go To: Top, Condensed phase thermochemistry data, Henry's Law data, Mass spectrum (electron ionization), UV/Visible spectrum, Gas Chromatography, References

• Symbols used in this document:
  

  Cp,liquid	Constant pressure heat capacity of liquid
  S°liquid	Entropy of liquid at standard conditions
  d(ln(kH))/d(1/T)	Temperature dependence parameter for Henry's Law constant
  k°H	Henry's Law constant at 298.15K
  ΔcH°liquid	Enthalpy of combustion of liquid at standard conditions
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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