Phthalic-3,4,5,6-d4 Acid | CAS 87976-26-9

OVERVIEW of Phthalic-3,4,5,6-d4 Acid | CAS 87976-26-9

Phthalic-3,4,5,6-d₄ Acid is a deuterium-labeled aromatic dicarboxylic acid, incorporating four deuterium atoms selectively on the benzene ring. This isotopically enriched compound is widely used as an internal standard, reference material, and research tool for analytical chemistry, environmental testing, and polymer science. Its deuterated structure provides a reliable mass shift that is easily distinguished in mass spectrometric analyses while maintaining identical chemical behavior to the non-labeled phthalic acid.

The compound is especially valuable for laboratories working on trace-level quantification, method validation, and mechanistic studies involving phthalic acid, phthalate esters, environmental pollutants, and aromatic dicarboxylates. Phthalic-d₄ Acid supports high accuracy, precision, and reproducibility, making it ideal for advanced LC-MS and GC-MS workflows.

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CHEMICAL INFORMATION

• Name: Phthalic-3,4,5,6-d₄ Acid

• CAS Number: 87976-26-9

• Molecular Formula: C₈H₂D₄O₄

• Molecular Weight: 170.16 g/mol

• Isotopic Enrichment: Typically ≥98% D

• Functional Groups: Aromatic ring, two carboxylic acid groups (ortho position)

• Stability: Chemically stable under normal laboratory storage

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APPLICATIONS  of  Phthalic-3,4,5,6-d4 Acid | CAS 87976-26-9
Phthalic-3,4,5,6-d₄ Acid is used broadly across multiple scientific and industrial domains due to its isotopic clarity and analytical reliability:

• Internal Standard for LC-MS & GC-MS:
  Provides excellent mass differentiation from native phthalic acid, enabling accurate quantification in complex matrices such as food, environmental samples, plastics, and biological fluids.

• Environmental Contaminant Studies:
  Essential for monitoring phthalates and related degradation products in soil, water, industrial waste, indoor air, and consumer products.

• Polymer & Material Chemistry:
  Used to track phthalic acid formation during polymer degradation, plasticizer analysis, and additive leaching studies.

• Isotope Dilution Mass Spectrometry (IDMS):
  Enhances accuracy in trace-level quantification and method validation.

• Metabolic & Biochemical Tracing:
  Supports studies on phthalate biotransformation pathways, microbial degradation, and toxicological investigations.

• Calibration & Quality Control:
  Valuable for instrument calibration, precision testing, and assessing analytical method performance.

• Mechanistic & Reaction Studies:
  Enables investigation of aromatic substitution reactions, deuterium isotope effects, and controlled kinetic studies.

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ADVANTAGES  of  Phthalic-3,4,5,6-d4 Acid | CAS 87976-26-9

• High Isotopic Purity for Clear Mass Separation:
  Makes peak identification straightforward even in highly complex chromatograms.

• Chemically Identical to Native Phthalic Acid:
  Ensures consistent reactivity, retention time, and fragmentation behavior.

• Exceptional Stability:
  Resistant to degradation, oxidation, and isotopic exchange under proper storage.

• Enhanced Accuracy in Trace Analyses:
  Minimizes matrix interferences and improves quantitative reliability.

• Wide Analytical Compatibility:
  Works efficiently with LC-MS, GC-MS (after derivatization), FTIR, NMR, and other spectroscopy platforms.

• Ideal for Regulatory & Compliance Testing:
  Supports laboratories involved in phthalate monitoring, food safety analysis, and environmental compliance.

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SUMMARY
Phthalic-3,4,5,6-d₄ Acid is a highly valuable deuterium-labeled aromatic dicarboxylic acid used extensively in analytical chemistry, environmental science, and materials research. With four deuterium atoms positioned on the benzene ring, this compound offers a distinct isotopic signature without altering the chemical properties of phthalic acid, making it an outstanding internal standard for mass spectrometry and chromatography. Its stability, purity, and compatibility with a wide range of analytical workflows make it ideal for quantitative studies, method validation, mechanistic investigations, and environmental monitoring. Phthalic-d₄ Acid provides the precision and reliability required for modern high-performance analytical applications.

 

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