Description

1-Hydroxy-2-[4-(4-Carboxyphenylazo)-(2,5-Dimethoxyphenylazo)]-3-Sulfo-7-Aminonaphthalene Diammonium Salt is a high-purity, water-soluble azo dye intermediate with a complex, multi-functional structure. This compound is valued for its precise chromophoric properties and its role in synthesizing specialized dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing vivid and stable colorants.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of high-performance acid dyes and direct dyes for textiles like nylon, wool, and silk.
• Specialty Pigment Manufacturing: Used in the production of pigments for inks, coatings, and plastics where specific color fastness and stability are required.
• Biological Staining Reagent: Potential application as a staining agent in histology and microbiology due to its azo chromophore and ionic groups.
• Analytical Chemistry: Can be utilized as a colorimetric indicator or a complexometric agent in certain analytical methods.
• Research & Development: Serves as a sophisticated chemical entity for academic and industrial research in organic synthesis and dye chemistry.

Basic Information

Product Name	1-Hydroxy-2-[4-(4-Carboxyphenylazo)-(2,5-Dimethoxyphenylazo)]-3-Sulfo-7-Aminonaphthalene Diammonium Salt
CAS No.	150202-11-2
Molecular Formula	C25H26N6O8S · 2NH3 (or C25H32N8O8S)
Molecular Weight	Approx. 604.65 g/mol (as diammonium salt)
Synonyms	1-Hydroxy-2-[(4-carboxyphenyl)azo]-5-[(2,5-dimethoxyphenyl)azo]-7-amino-3-naphthalenesulfonic acid diammonium salt; C.I. Acid Red 299; Azo dye intermediate 150202-11-2; 7-Amino-1-hydroxy-2-[(4-carboxyphenyl)azo]-5-[(2,5-dimethoxyphenyl)azo]-3-naphthalenesulfonic acid, diammonium salt; Diammonium 7-amino-1-hydroxy-8-[(E)-2-(2,5-dimethoxyphenyl)diazenyl]-4-[(E)-2-(4-carboxyphenyl)diazenyl]naphthalene-3-sulfonate; Reactive azo dye precursor
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters 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 room temperature (15-25°C). The product is light-sensitive and should be handled accordingly to maintain stability.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility (1% in Water)	Complete, 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.