Description

Disodium 4-Hydroxy-3-[[3-Methyl-4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]-6-(Phenylamino)Naphthalene-2-Sulphonate is a high-purity, synthetic azo dye intermediate essential for producing vibrant and stable colorants. Its value lies in its precise chemical structure, which enables the creation of specific, high-performance shades with excellent light and wash fastness properties. This compound is a critical raw material for manufacturers in the textile, ink, and specialty coatings industries seeking reliable and consistent color quality.

Application

• Primary intermediate for the synthesis of high-grade azo dyes and pigments used in textile dyeing and printing.
• Key component in the production of inks for digital, packaging, and industrial printing applications.
• Used in the formulation of specialty coatings and paints requiring specific color properties and durability.
• Potential use as a colorant or intermediate in the research and development of functional materials and analytical reagents.
• Serves as a standard or reference compound in quality control laboratories for dye and pigment analysis.

Basic Information

Product Name	Disodium 4-Hydroxy-3-[[3-Methyl-4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]-6-(Phenylamino)Naphthalene-2-Sulphonate
CAS No.	67990-24-3
Molecular Formula	C29H21N5Na2O8S2
Molecular Weight	693.61 g/mol
Synonyms	Acid Red 337 (C.I. 17030); Disodium 6-anilino-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]-3-methylphenyl]azo]naphthalene-2,7-disulfonate; C.I. 17030; 6-Anilino-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]-3-methylphenyl]azo]naphthalene-2,7-disulfonic acid disodium salt; Benzenesulfonic acid, 4-[[4-[(6-anilino-4-hydroxy-3-sulfo-2-naphthalenyl)azo]-2-methylphenyl]azo]-, disodium salt; Azo dye intermediate 67990-24-3
EINECS	Contact for details

Quality Control

Our production of Disodium 4-Hydroxy-3-[[3-Methyl-4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]-6-(Phenylamino)Naphthalene-2-Sulphonate adheres to stringent quality management systems to ensure batch-to-batch consistency and purity. Every lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling, to meet exacting customer specifications. Certificates of Analysis (COA) documenting identity, purity, and related substances are provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials. For long-term storage, maintain under inert atmosphere if specified.

Specification

Item	Specification
Appearance	Dark red to 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
Related Substances (HPLC)	Individual impurity ≤ 1.0%

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