Description

Octadecanoic Acid-1-13C is a stable isotope-labeled analog of stearic acid, where the carbon-13 isotope is incorporated at the carboxyl position. This precise labeling is critical for applications requiring high-fidelity molecular tracing and quantification, such as metabolic flux analysis and pharmacokinetic studies. It is an essential research and diagnostic tool for scientists in the pharmaceutical, biotechnology, and academic sectors who require uncompromised isotopic purity and chemical stability for advanced analytical techniques.

Application

• Internal standard for the accurate quantification of stearic acid and related fatty acids in complex biological matrices using Gas Chromatography-Mass Spectrometry (GC-MS) and Liquid Chromatography-Mass Spectrometry (LC-MS).
• Tracer compound in metabolic pathway analysis and fluxomics studies to investigate lipid metabolism, energy homeostasis, and disease mechanisms.
• Key starting material or labeled intermediate in the synthesis of isotope-labeled pharmaceuticals, prodrugs, or biomarkers for clinical research.
• Use in nuclear magnetic resonance (NMR) spectroscopy as a probe to study molecular structure, dynamics, and interactions in lipid systems.
• Component in the development and validation of diagnostic assays and clinical testing methods for metabolic disorders.
• Research applications in nutritional science and food chemistry to track fat absorption, digestion, and metabolism.

Basic Information

Product Name	Octadecanoic Acid-1-13C
CAS No.	85541-42-0
Molecular Formula	¹³CH₃(CH₂)₁₆COOH or C17¹³CH36O2
Molecular Weight	285.48 g/mol (approx.)
Synonyms	Stearic Acid-1-13C; 1-13C-Stearic Acid; [1-13C]Octadecanoic Acid; [Carboxy-13C]Stearic Acid; Isotopic Stearic Acid; Labeled Stearic Acid; C18:0-1-13C; n-Octadecanoic-1-13C Acid
EINECS	Contact for details

Quality Control

Every batch of Octadecanoic Acid-1-13C is manufactured and analyzed under strict quality systems to ensure exceptional isotopic and chemical purity, which is paramount for sensitive research applications. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) detailing isotopic enrichment (atom % 13C), chemical purity, and identity confirmation are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store at controlled room temperature (15-25°C) in a dry environment. For long-term storage, consider keeping the material under an inert atmosphere to maintain stability.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Isotopic Enrichment (MS)	≥ 99 atom % 13C
Melting Point	67 - 71 °C

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.