8.52031 EMD Millipore


Fmoc-Cys(Mmt)-OH Novabiochem®. CAS 177582-21-7, molar mass 615.74 g/mol., Novabiochem®

Synonym: N-α-Fmoc-S-p-methoxytrityl-L-cysteine

  • CAS Number 177582-21-7

  • Linear Formula C₃₈H₃₃NO₅S

  • Molecular Weight 615.74 g/mol



Related Categories Amino Acids & Derivatives, Chemical Biology, Chemical Synthesis, Cysteine/Cystine, Peptide Chemistry More...
brand family   Novabiochem
packaging   1 g in Glass bottle (8520310001)
  25 g in Plastic bottle (8520310025)
  5 g in Glass bottle (8520310005)
shipped in   ambient
storage temp.   Store at -15°C to -25°C.
specifications   Colour (visual): white to slight yellow to beige
  Appearance of substance (visual): powder
  Identity (IR): passes test
  Enantiomeric purity: ≥ 99.0 % (a/a)
  Purity (TLC(011A)): ≥ 99 %
  Purity (TLC(0811)): ≥ 99 %
  Assay (HPLC, area%): ≥ 98.0 % (a/a)
  Solubility (1 mmole in 2 ml DMF): clearly soluble
  Assay (acidimetric): ≥ 85.0 %
  Water (K. F.): ≤ 1.0 %
  For TLC-Systems see our General Catalog


Background information

The Mmt group can be selectively deprotected on the solid phase with 1% TFA in DCM containing 5% TIS [1 - 4]. Reference 4 describes a novel method for on-resin disulfide bond formation which uses Cys(Mmt) in combination with Cys(tBuS).

The product number for this product was previously 04-12-1061.

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Safety Information

HS Code 
2930 90 16
Storage class 
10 - 13 Other liquids and solids
WGK 2 water endangering
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