Description

Terephthalic-Carboxy-13C2 Acid CAS NO 121191-53-5 is a high-purity, isotopically labeled derivative of terephthalic acid, where both carboxyl carbon atoms are the stable isotope carbon-13. This compound is critical for advanced analytical and research applications requiring precise molecular tracing and quantification. It is primarily utilized by researchers and quality control laboratories in the pharmaceutical, polymer science, and environmental analysis sectors for use as an internal standard or tracer in mass spectrometry and NMR studies.

Application

• Internal Standard for LC-MS/MS: Used for the accurate quantification of terephthalic acid and related metabolites in complex biological and environmental matrices.
• Metabolic Pathway Tracing: Serves as a stable isotope tracer in pharmacokinetic and metabolic flux studies within pharmaceutical and biochemical research.
• Polymer Research: Employed in the synthesis and analysis of isotopically labeled polyesters, such as PET, to study degradation, structure, and polymerization kinetics.
• Environmental Analysis: Acts as a reference standard for detecting and measuring phthalate derivatives and degradation products in water and soil samples.
• NMR Spectroscopy: Provides a distinct signal for structural elucidation and dynamic studies of molecules and materials containing the terephthalate moiety.
• Method Development & Validation: Essential for developing and validating highly sensitive and specific analytical methods in regulatory and industrial QC labs.

Basic Information

Product Name	Terephthalic-Carboxy-13C2 Acid
CAS No.	121191-53-5
Molecular Formula	C613C2H6O4
Molecular Weight	170.11 g/mol
Synonyms	1,4-Benzenedicarboxylic-13C2 Acid; Terephthalic-13C2 Acid; p-Phthalic-13C2 Acid; Benzene-1,4-dicarboxylic-13C2 Acid; PTA-13C2; [13C2]-Terephthalic Acid; Isotopically Labeled Terephthalic Acid; 13C2-TPA
EINECS	Contact for details

Quality Control

Our Terephthalic-Carboxy-13C2 Acid is manufactured under strict quality systems to ensure exceptional isotopic and chemical purity for research applications. Each batch is accompanied by a comprehensive Certificate of Analysis (COA) detailing isotopic enrichment (typically >99 atom % 13C), chemical purity by HPLC, and identity confirmation by spectroscopic methods. We support compliance with relevant research and analytical standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and must be kept under dry, inert conditions to maintain stability and purity. Ensure the storage area is well-ventilated.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Isotopic Enrichment (13C)	≥ 99 atom %
Assay (HPLC)	≥ 98.0%
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.