Description

1,8-Dihydroxynaphthylene-3,6-Disulfonic Acid is a high-purity, multifunctional aromatic sulfonic acid derivative, serving as a critical intermediate in advanced chemical synthesis. Its value lies in its dual hydroxyl and sulfonic acid functional groups, which make it a versatile building block for creating complex dyes, pigments, and specialty chemicals. This compound is essential for manufacturers and R&D laboratories in the dyestuff, pharmaceutical, and analytical reagent industries seeking reliable, high-quality intermediates for their processes.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of acid dyes, direct dyes, and metal-complex pigments, particularly for textiles and leather.
• Pharmaceutical Synthesis: Used as a building block in the manufacture of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Chemical Reagent: Employed in analytical chemistry and research as a chelating agent or a reagent for specific organic transformations.
• Photographic Chemicals: Can be utilized in the production of certain photographic developers and sensitizers.
• Corrosion Inhibitor Formulation: Acts as a component in specialty formulations designed to prevent metal corrosion in industrial systems.
• Polymer Modification: Used to introduce sulfonic acid groups into polymers, altering their solubility and ionic properties.

Basic Information

Product Name	1,8-Dihydroxynaphthylene-3,6-Disulfonic Acid
CAS No.	148-25-4
Molecular Formula	C10H8O8S2
Molecular Weight	320.30 g/mol
Synonyms	Chromotropic Acid; 1,8-Dihydroxynaphthalene-3,6-disulfonic Acid; 4,5-Dihydroxynaphthalene-2,7-disulfonic Acid; NSC 403697; 1,8-Dihydroxy-3,6-naphthalenedisulfonic Acid; 1,8-Dihydroxynaphthalene-3,6-disulphonic Acid
EINECS	205-713-6

Quality Control

Our 1,8-Dihydroxynaphthylene-3,6-Disulfonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for industrial and laboratory use. Certificates of Analysis (COA) documenting purity, assay, and impurity profiles are provided with every shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). The product is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light tan crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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