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64306 Sigma-Aldrich

S-Methyl methanethiosulfonate

purum, ≥98.0% (GC)

Synonym: S-Methyl thiomethanesulfonate, MMTS



Related Categories Building Blocks, Chemical Synthesis, Organic Building Blocks, Sulfonates/Sulfinates, Sulfur Compounds More...
grade   purum
assay   ≥98.0% (GC)
refractive index   n20/D 1.513(lit.)
  n20/D 1.513
bp   69-71 °C/0.4 mmHg(lit.)
solubility   chloroform: 750mg + 5 ml Chloroform mg/mL, colorless to light greenish-yellow
density   1.337 g/mL at 20 °C
  1.337 g/mL at 25 °C(lit.)
storage temp.   2-8°C


Frequently Asked Questions

Frequently Asked Questions are available for this Product.


may discolor to yellow on storage

Other Notes

Methylsulfenylating agent with many applications; For the α-methylsulfenylation of cyclic ketones; Methyl disulfides from thiols; selective, reversible inactivation of enzymes

Price and Availability

Safety & Documentation

Safety Information

UN 3334
WGK Germany 
Flash Point(F) 
188.6 °F
Flash Point(C) 
87 °C

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
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What is the Department of Transportation shipping information for this product?
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My question is not addressed here, how can I contact Technical Service for assistance?
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What is the solubility of Product 64306, S-Methyl methanethiosulfonate?
Product 64306, S-Methyl methanethiosulfonate, is practically insoluble in water.  It is soluble in methylene chloride.  Several references do report that S-Methyl methanethiosulfonate is soluble in isopropanol at a 200mM concentration.  References are provided below:  1.  Yan, W., et al., "Quantitative Proteomic Analysis to Profile Dynamic Changes in the Spatial Distribution of Cellular Proteins", in Methods in Molecular Biology, Vol. 432: Organelle Proteomics, pp. 389-401 (Humana Press, 2008). 2.  Sadowski, P.G., et al., Quantitative proteomic approach to study subcellular localization of membrane proteins.  Nature Protocols, 1, 1778-1789 (2006).
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