Description

Disodium 3-Hydroxy-4-[[1-(Sulphonatomethyl)-2-Naphthyl]Azo]-2-Naphthoate is a high-purity, water-soluble azo dye intermediate known for its excellent chromophore properties and stability. This compound is essential for manufacturers requiring precise color development and consistent batch-to-batch performance in demanding applications. It is primarily utilized by the textile, ink, and specialty chemical industries for producing vibrant and durable colorants.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the formulation of high-quality printing inks, including for packaging and publications.
• Pigment Production: Serves as a precursor for creating organic pigments used in paints, plastics, and coatings.
• Leather Coloring: Employed in the dyeing process for leather goods to achieve deep, uniform shades.
• Paper Industry: Applied in the coloring of specialty papers and paper products.
• Research & Development: Used as a standard or building block in chemical research for novel dye synthesis.

Basic Information

Product Name	Disodium 3-Hydroxy-4-[[1-(Sulphonatomethyl)-2-Naphthyl]Azo]-2-Naphthoate
CAS No.	68258-66-2
Molecular Formula	C22H14N2Na2O7S
Molecular Weight	488.39 g/mol
Synonyms	Acid Red 337; C.I. 17210; Disodium 3-hydroxy-4-[(1-sulfomethyl-2-naphthyl)azo]-2-naphthoate; 2-Naphthalenecarboxylic acid, 3-hydroxy-4-[(1-sulfomethyl-2-naphthyl)azo]-, disodium salt; 68258-66-2; Azo dye intermediate 68258-66-2; C.I. Acid Red 337
EINECS	Contact for details

Quality Control

Our Disodium 3-Hydroxy-4-[[1-(Sulphonatomethyl)-2-Naphthyl]Azo]-2-Naphthoate is manufactured under strict quality systems to ensure high purity and consistency. Every batch is tested against rigorous in-house specifications, which include identity confirmation, purity assay, and impurity profiling. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee compliance with your technical requirements.

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 material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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