Description

Diammonium 7-Benzamido-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate CAS NO 83968-57-4 is a high-purity, water-soluble azo dye intermediate characterized by its complex disazo structure. This compound is essential for synthesizing vibrant and stable dyes and pigments, offering excellent color strength and compatibility with various substrates. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking to produce high-performance colorants.

Application

• Textile Dyeing: A key intermediate for producing acid dyes and direct dyes for coloring nylon, silk, wool, and paper.
• Ink Manufacturing: Used in the formulation of inks for jet printing, packaging, and security applications requiring specific chromatic properties.
• Pigment Synthesis: Serves as a precursor for creating high-grade organic pigments used in plastics, paints, and coatings.
• Leather Coloring: Employed in the production of dyes for the leather tanning and finishing industry.
• Research & Development: Used in chemical research for developing new chromophores and studying azo dye chemistry.
• Specialty Coatings: Incorporated into formulations for coatings where specific light-fastness and color stability are required.

Basic Information

Product Name	Diammonium 7-Benzamido-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate
CAS No.	83968-57-4
Molecular Formula	C29H24N6O8S2 · 2NH3
Molecular Weight	Contact for details
Synonyms	7-Benzamido-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]naphthalene-2-sulfonic acid, diammonium salt; C.I. Acid Red 337; Diammonium 7-benzamido-4-hydroxy-3-((4-((4-sulfophenyl)azo)phenyl)azo)naphthalene-2-sulfonate; Disazo dye intermediate RED 337; Acid Dye Intermediate; Azo dye precursor
EINECS	Contact for details

Quality Control

Our production of Diammonium 7-Benzamido-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and spectrophotometry for color strength, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) documenting key 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 minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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