Description

Octadecanoic-17,17,18,18,18-D5 Acid is a high-purity, isotopically labeled derivative of stearic acid, specifically deuterated at the terminal methyl group. This compound is essential as a stable isotope-labeled internal standard for precise quantitative analysis in mass spectrometry and other advanced analytical techniques. It is critically needed by researchers and quality control laboratories in the pharmaceutical, metabolic research, and chemical synthesis sectors to ensure accurate measurement and traceability.

Application

• Internal standard for the quantitative analysis of stearic acid and related fatty acids via Gas Chromatography-Mass Spectrometry (GC-MS) and Liquid Chromatography-Mass Spectrometry (LC-MS).
• Tracer compound in metabolic pathway studies and lipidomics research to investigate fatty acid metabolism and biosynthesis.
• Critical reagent in the development and validation of analytical methods for pharmaceutical quality control and bioanalytical assays.
• Starting material or intermediate for the synthesis of other deuterium-labeled compounds and specialty chemicals.
• Use in environmental testing and food safety analysis for the accurate detection and quantification of fatty acid contaminants or nutrients.
• Application in material science research, particularly in surface chemistry and polymer studies where labeled fatty acids are used as probes.

Basic Information

Product Name	Octadecanoic-17,17,18,18,18-D5 Acid
CAS No.	211443-83-3
Molecular Formula	C₁₈H₃₁D₅O₂
Molecular Weight	287.51 g/mol
Synonyms	Stearic Acid-d5; Octadecanoic-d5 Acid; 17,17,18,18,18-Pentadeuteriooctadecanoic Acid; Deuterated Stearic Acid; Stearic Acid (methyl-d5); D5-Stearic Acid; Isotopic Stearic Acid; Perdeuteromethyl Stearic Acid
EINECS	Contact for details

Quality Control

Our Octadecanoic-17,17,18,18,18-D5 Acid is manufactured under strict quality systems to ensure exceptional isotopic purity and chemical integrity. Each batch is characterized by advanced analytical techniques including NMR and Mass Spectrometry to confirm deuterium incorporation and chemical purity. Certificates of Analysis (COA) detailing isotopic enrichment (typically >98 atom % D), chemical purity (by HPLC/GC), and other critical parameters are provided to guarantee reliable and reproducible performance in your sensitive applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Due to its nature as an easily oxidized compound, it is recommended to store under an inert atmosphere (e.g., nitrogen or argon) for long-term preservation, especially after opening the primary container. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms to structure
Purity (HPLC/GC)	≥ 98.0%
Isotopic Purity (Atom % D)	≥ 98%
Chemical Purity Assay	≥ 97.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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