Description

1,3-Dihydro-1,3-Dioxo-5-Isobenzofuransulfonic Acid Ammonium Salt is a versatile organic salt derivative of phthalic anhydride, valued for its sulfonic acid functionality and water solubility. This compound serves as a critical building block and intermediate in the synthesis of specialty chemicals, where its ionic character and reactive sites enable precise molecular modifications. It is primarily needed by manufacturers in the pharmaceutical, agrochemical, and dye industries for developing active ingredients, colorants, and functional additives.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and drug conjugates.
• Agrochemical Synthesis: Serves as a key precursor for manufacturing herbicides, fungicides, and plant growth regulators.
• Dye and Pigment Manufacturing: Acts as a sulfonating agent and intermediate for producing water-soluble dyes and organic pigments.
• Chemical Research & Development: Employed as a versatile building block in organic synthesis and material science.
• Polymer Modification: Used to introduce sulfonate groups into polymers to enhance hydrophilicity and ionic properties.
• Catalyst and Ligand Preparation: Utilized in the preparation of specialized catalysts and coordinating ligands.

Basic Information

Item	Details
Product Name	1,3-Dihydro-1,3-Dioxo-5-Isobenzofuransulfonic Acid Ammonium Salt
CAS No.	70615-17-7
Molecular Formula	C8H8NO6S
Molecular Weight	246.22 g/mol
Synonyms	Ammonium 1,3-dioxo-1,3-dihydroisobenzofuran-5-sulfonate; 5-Sulfoisophthalic Acid Ammonium Salt Anhydride; Ammonium 5-Sulfophthalate; Isobenzofuran-5-sulfonic Acid, 1,3-Dihydro-1,3-dioxo-, Ammonium Salt; 5-Carboxy-2-sulfobenzoic Acid Ammonium Salt Anhydride; Phthalic Anhydride-5-sulfonic Acid Ammonium Salt; 1,3-Dioxo-1,3-dihydroisobenzofuran-5-sulfonic Acid Ammonium Salt
EINECS	Contact for details

Quality Control

Our 1,3-Dihydro-1,3-Dioxo-5-Isobenzofuransulfonic Acid Ammonium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting key parameters are available upon request, providing full traceability and compliance with your internal specifications.

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). This product is hygroscopic (moisture-sensitive) and must be kept in a dry environment to prevent caking or decomposition. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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