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64306 Sigma-Aldrich

S-Methyl methanethiosulfonate

purum, ≥98.0% (GC)

Synonym: S-Methyl thiomethanesulfonate, MMTS

  • CAS Number 2949-92-0

  • Linear Formula CH3SO2SCH3

  • Molecular Weight 126.20

  •  Beilstein/REAXYS Number 1446059

  •  EC Number 220-970-0

  •  MDL number MFCD00007565

  •  PubChem Substance ID 329759952

  •  NACRES NA.22



Related Categories Building Blocks, Chemical Synthesis, Organic Building Blocks, Sulfonates/Sulfinates, Sulfur Compounds More...
Quality Level   200
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
SMILES string   CSS(C)(=O)=O
InChI   1S/C2H6O2S2/c1-5-6(2,3)4/h1-2H3



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

Safety & Documentation

Safety Information

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

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.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
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What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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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