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Medchemexpress LLC Octadecanoic-17,17,18,18,18-d5 acid | 211443-83-3 | MFCD01075453 | 98.4% | 289.51 g·mol-1 | C18H31D5O2 | 10 MG
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Supplier:  Medchemexpress LLC HYB2219S610MG

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Stearic acid-d5 is a deuterium-labeled analogue of stearic (octadecanoic) acid used as an internal standard for quantitative mass spectrometry. The compound (CAS 211443-83-3) contains five deuterium atoms and provides a consistent mass shift for accurate tracer-based quantification in biological and analytical samples. Supplied as a solid for preparation of stock solutions.

  • Deuterated internal standard (d5) for GC-MS and LC-MS.
  • Chemical formula C18H31D5O2; molecular weight ~289.51 g·mol-1.
  • High isotopic purity for reliable mass spectrometry quantification.
  • Suitable for preparation of stock solutions in common organic solvents.
  • Commonly used in lipidomics, metabolism, and pharmacokinetic studies.

Catalog No. 50-002-96807


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