Description

Sodium 3-[[4-[(o-Tolyl)Amino]-5-Sulpho-1-Naphthyl]Azo]-2,1-Benzisothiazole-5-Sulphonate is a high-purity, water-soluble azo dye intermediate and specialty chemical. This compound is valued for its strong chromophore and functional sulphonate groups, which provide excellent solubility and binding properties in aqueous systems. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries for producing vibrant, durable colors.

Application

• Primary Intermediate for Reactive and Direct Dyes: A key building block in the synthesis of high-performance dyes for cotton, wool, and nylon fibers.
• Pigment Manufacturing: Used in the production of organic pigments for inks, including flexographic and packaging inks.
• Specialty Coatings: Imparts color and functional properties in industrial and decorative coatings.
• Research & Development: Serves as a standard or reagent in chemical research for developing new colorants and functional materials.
• Functional Additive: Potential use as a colorimetric indicator or sensor component due to its specific structural properties.

Basic Information

Product Name	Sodium 3-[[4-[(o-Tolyl)Amino]-5-Sulpho-1-Naphthyl]Azo]-2,1-Benzisothiazole-5-Sulphonate
CAS No.	85223-33-2
Molecular Formula	C24H16N5NaO6S2
Molecular Weight	557.53 g/mol
Synonyms	Acid Red 337 (C.I. 17200); Sodium 2,1-Benzisothiazole-5-sulfonate, 3-[[4-[(2-methylphenyl)amino]-5-sulfo-1-naphthalenyl]azo]-; Benzenesulfonic acid, 2-[[4-[(2-methylphenyl)amino]-5-sulfo-1-naphthalenyl]azo]-5-sulfo-, sodium salt; C.I. 17200; o-Tolyl Amino Naphthyl Azo Benzisothiazole Sulphonate; Reactive Dye Intermediate; Azo Dye Intermediate AR-337
EINECS	Contact for details

Quality Control

Our production of Sodium 3-[[4-[(o-Tolyl)Amino]-5-Sulpho-1-Naphthyl]Azo]-2,1-Benzisothiazole-5-Sulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm

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