Description

4-(4-Chloro-2-Methylphenoxy-D 3)Butyric Acid is a deuterated analog of a key phenoxybutyric acid derivative, serving as a critical stable isotope-labeled compound. Its primary value lies in its use as an internal standard for precise quantitative analysis in advanced mass spectrometry, ensuring data accuracy and reliability. This high-purity compound is essential for researchers and quality control laboratories in the pharmaceutical, agrochemical, and environmental science sectors, particularly for method development and metabolite tracking studies.

Application

• Internal Standard for LC-MS/MS: Used as a deuterium-labeled internal standard for the accurate quantification of its non-deuterated counterpart and related metabolites in complex biological matrices.
• Pharmaceutical Research: Critical in drug metabolism and pharmacokinetics (DMPK) studies to track absorption, distribution, metabolism, and excretion (ADME) of phenoxybutyric acid-based drug candidates.
• Agrochemical Analysis: Employed in residue analysis and environmental fate studies of related herbicides and plant growth regulators.
• Biochemical Tracer: Serves as a stable isotopic tracer in mechanistic studies of biochemical pathways involving phenoxy acid compounds.
• Reference Material: Acts as a certified reference material (CRM) for calibrating analytical instruments and validating testing methods in compliance laboratories.

Basic Information

Product Name	4-(4-Chloro-2-Methylphenoxy-D 3)Butyric Acid
CAS No.	1219803-42-5
Molecular Formula	C11H10D3ClO3
Molecular Weight	231.70 g/mol (for monoisotopic mass)
Synonyms	4-(4-Chloro-2-methylphenoxy)butyric-3,3,4,4-d4 acid; 4-(4-Chloro-o-tolyloxy)butyric-d4 acid; 2-Methyl-4-chlorophenoxybutyric-d4 acid; MCPB-d4; Deuterated MCPB; [2H3]-4-(4-Chloro-2-methylphenoxy)butanoic acid; 4-(4-Chloro-2-methylphenoxy)[3,3,4,4-2H4]butyric Acid
EINECS	Contact for details

Quality Control

Every batch of 4-(4-Chloro-2-Methylphenoxy-D 3)Butyric Acid is manufactured and tested under strict quality management systems. We guarantee high chemical and isotopic purity, verified by advanced analytical techniques including NMR, HPLC, and Mass Spectrometry. Certificates of Analysis (COA) are provided with each shipment, detailing batch-specific results for identity, purity, isotopic enrichment, and impurities. Our quality commitment ensures the reliability required for your most sensitive analytical 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). The product is light-sensitive and should be handled under appropriate conditions to maintain stability and isotopic integrity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (MS)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Isotopic Enrichment	≥ 98 atom % D
Chemical Purity (NMR)	Conforms
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.