Description

Diammonium 7-Hydroxy-8-(Phenylazo)Naphthalene-1,3-Disulphonate is a high-purity, water-soluble azo dye intermediate. This compound is valued for its role as a key precursor in the synthesis of vibrant and stable acid dyes and pigments. It is primarily required by manufacturers in the textile, leather, and specialty ink industries seeking consistent quality for colorant production. Our supply ensures reliable performance and batch-to-batch uniformity for critical industrial applications.

Application

• Primary Intermediate for Acid Dyes: Essential for manufacturing a range of acid dyes used for coloring nylon, wool, and silk fibers.
• Leather Dyeing: Used in the formulation of dyes for high-quality leather finishing.
• Ink & Toner Production: Serves as a colorant component in the production of specialty inks and electrophotographic toners.
• Paper Coloring: Employed in the manufacture of dyes for high-grade paper products.
• Biological Staining: Potential use as a staining agent in histological and microbiological applications.
• Research & Development: Used as a standard or building block in organic synthesis and color chemistry R&D.

Basic Information

Product Name	Diammonium 7-Hydroxy-8-(Phenylazo)Naphthalene-1,3-Disulphonate
CAS No.	83898-22-0
Molecular Formula	C₁₆H₁₆N₄O₇S₂
Molecular Weight	440.45 g/mol
Synonyms	7-Hydroxy-8-(phenylazo)naphthalene-1,3-disulfonic acid diammonium salt; Acid Orange 20 intermediate; C.I. 14600 intermediate; Diammonium 8-(phenylazo)-7-hydroxynaphthalene-1,3-disulfonate; 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-(phenylazo)-, diammonium salt; Azo dye intermediate DN-7; Phenylazonaphthol disulfonate salt
EINECS	Contact for details

Quality Control

Our Diammonium 7-Hydroxy-8-(Phenylazo)Naphthalene-1,3-Disulphonate is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and 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). Keep away from heat sources and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Orange to red-brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, complete solution

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