Description

4-[(Phenylsulphonyl)Oxy]Phthalic Acid is a specialized aromatic sulfonate ester derivative of phthalic acid, serving as a high-value synthetic intermediate. This compound matters for its role in constructing complex molecular architectures, particularly in advanced material science and pharmaceutical research. It is primarily needed by R&D chemists and process engineers in the fine chemical, agrochemical, and polymer industries for developing novel compounds and functional materials.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs) and novel drug candidates.
• Agrochemical Synthesis: Used in the research and development of new herbicides, fungicides, and plant growth regulators.
• Polymer & Material Science: Serves as a monomer or cross-linking agent for producing specialty polymers, resins, and high-performance materials.
• Dye & Pigment Manufacturing: Intermediate in the synthesis of complex organic dyes and colorants.
• Liquid Crystal & OLED Research: A potential precursor for electronic chemicals used in display technologies.
• Academic & Contract Research: Valuable reagent for methodological studies and novel organic synthesis in university and CRO laboratories.

Basic Information

Product Name	4-[(Phenylsulphonyl)Oxy]Phthalic Acid
CAS No.	51419-12-6
Molecular Formula	C14H10O7S
Molecular Weight	322.29 g/mol
Synonyms	4-(Phenylsulfonyloxy)phthalic acid; 4-(Benzenesulfonyloxy)phthalic acid; 1,2-Benzenedicarboxylic acid, 4-[(phenylsulfonyl)oxy]-; Phthalic acid, 4-[(phenylsulfonyl)oxy]-; 4-Hydroxyphthalic acid phenylsulfonate ester; 4-PSPA; 4-Phenylsulfonyloxyphthalic Acid
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Each batch is controlled via modern analytical techniques to guarantee identity, purity, and consistency. Certificates of Analysis (COA) documenting key parameters are available upon request. We adhere to a quality management system suitable for supplying fine chemical intermediates to demanding industrial and research sectors.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong bases and oxidizing agents. For long-term storage, consider under an inert atmosphere to maintain optimal purity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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