• CAT Number: C000255
  • CAS Number: 81202-04-2
  • Molecular Formula: C₄¹³CH₁₁NO₂S
  • Molecular Weight: 150.20
  • Purity: ≥95%
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L-Methionine-1-13C (Cat No.: C000255) is a stable isotope-labeled form of L-Methionine, an essential amino acid. This labeled compound is used in medical diagnostics, particularly in L-Methionine-1-13C breath tests that assess hepatic regeneration. In these tests, the labeled methionine is administered, and the body’s metabolic processes break down the labeled methionine, leading to the release of labeled carbon dioxide. By measuring the labeled carbon dioxide in exhaled breath, healthcare professionals can gather information about liver function and regeneration.

Catalog Number C000255
CAS Number 81202-04-2
Molecular Formula


Purity 95%
Storage 4°C
IUPAC Name (2S)-2-amino-4-methylsulfanyl(113C)butanoic acid
InChI InChI=1S/C5H11NO2S/c1-9-3-2-4(6)5(7)8/h4H,2-3,6H2,1H3,(H,7,8)/t4-/m0/s1/i5+1

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