Description

4-Hydroxy-3-Cyclobutene-1,2-Dione-1,4-13C2 is a stable isotope-labeled derivative of squaric acid, specifically enriched with carbon-13 at the 1 and 4 positions. This compound is essential for advanced analytical research, providing a critical internal standard for precise quantification and metabolic pathway tracing using techniques like NMR and Mass Spectrometry. It is primarily utilized by pharmaceutical researchers, agrochemical developers, and academic institutions engaged in sophisticated isotope dilution analysis and mechanistic studies.

Application

• Internal Standard for Quantitative Analysis: Used in LC-MS and GC-MS for the accurate quantification of squaric acid and its derivatives in complex biological matrices.
• Metabolic Pathway Tracing: Serves as a labeled precursor in NMR spectroscopy studies to elucidate biochemical transformation pathways in drug metabolism and plant science.
• Pharmaceutical Research: Employed in the development and validation of analytical methods for APIs and impurities where squaric acid motifs are present.
• Chemical Synthesis Research: Acts as a labeled building block for synthesizing more complex 13C-labeled compounds for research purposes.
• Environmental Fate Studies: Helps track the environmental degradation and transformation of squaric acid-based compounds.

Basic Information

Product Name	4-Hydroxy-3-Cyclobutene-1,2-Dione-1,4-13C2
CAS No.	1345994-72-0
Molecular Formula	C213C2H2O3
Molecular Weight	116.03 (for 13C2 labeled form)
Synonyms	1,4-13C2-Squaric Acid; 3,4-Dihydroxy-3-cyclobutene-1,2-dione-1,4-13C2; 13C2-Square Acid; Isotope Labeled Squaric Acid; 1,4-13C2-3,4-Dihydroxycyclobut-3-ene-1,2-dione; 13C2-Quadratic Acid; 13C2-1,2-Dihydroxycyclobutenedione
EINECS	Contact for details

Quality Control

Our isotope-labeled chemicals are produced and handled under strict quality protocols to ensure isotopic and chemical purity. Each batch is analyzed via NMR and HPLC-MS to confirm enrichment level and chemical identity. Certificates of Analysis (COA) detailing isotopic purity (e.g., 99 atom % 13C), chemical purity, and analytical methods are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store at controlled room temperature (15-25°C) in a dry environment. This material is hygroscopic (moisture-sensitive); keep the container tightly sealed in a desiccated atmosphere to maintain stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to 13C2-labeled structure
Purity (HPLC)	≥ 98.0%
Isotopic Purity (NMR/MS)	≥ 99 atom % 13C
Water Content (KF)	≤ 1.0%

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