Description

Sodium 2-Naphthol-3,5,7-Trisulfonate is a high-purity, water-soluble aromatic sulfonate salt. This compound is valued for its strong chelating and dispersing properties, making it a critical intermediate in several high-value chemical syntheses. It is primarily sought after by manufacturers in the dye, pigment, and specialty chemical industries for producing vibrant and stable colorants.

Application

• Dye and Pigment Intermediate: A key building block for the synthesis of acid dyes, reactive dyes, and organic pigments, particularly azo dyes.
• Chelating Agent: Used in water treatment formulations and industrial cleaning products to sequester metal ions like calcium and magnesium.
• Dispersing Agent: Improves the stability and uniformity of suspensions in coatings, inks, and ceramic formulations.
• Chemical Synthesis: Serves as a versatile sulfonated intermediate for further organic transformations in pharmaceutical and agrochemical research.
• Analytical Reagent: Employed in certain colorimetric assays and as a standard in analytical chemistry.

Basic Information

Product Name	Sodium 2-Naphthol-3,5,7-Trisulfonate
CAS No.	58645-40-2
Molecular Formula	C10H5Na3O10S3
Molecular Weight	474.30 g/mol
Synonyms	2-Naphthol-3,5,7-trisulfonic acid trisodium salt; Trisodium 2-hydroxynaphthalene-3,5,7-trisulfonate; Naphthol trisulfonic acid sodium salt; Acid Yellow 76 intermediate; CI 18850
EINECS	Contact for details

Quality Control

Our Sodium 2-Naphthol-3,5,7-Trisulfonate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure consistent purity and performance. Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are available upon request to support your quality assurance protocols.

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); keep the original container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Yellowish to brown powder
Identification (IR)	Conforms
Assay (HPLC)	Min. 95.0%
Water Content	Max. 5.0%
Sulfate Ash	30.0 - 40.0%
pH (1% Solution)	7.0 - 9.0

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