Description

8-[(7-Amino-1-Hydroxy-3-Sulpho-2-Naphthyl)Azo]-5-[[4-(Phenylazo)-7-Sulpho-1-Naphthyl]Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt is a high-purity, polyazo dye intermediate of significant industrial importance. Its complex molecular structure provides excellent chromophoric properties, making it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, colorfast products. We supply this material with a focus on consistent quality and reliable global supply chain logistics.

Application

• Primary intermediate for the synthesis of high-grade, polyazo direct dyes and acid dyes for textiles.
• Key precursor in the manufacturing of pigments for industrial inks, including packaging and printing inks.
• Used in the production of colorants for specialty coatings and artistic paints requiring high lightfastness.
• Employed in research and development for novel chromophores and functional dyes.
• Potential use in the formulation of dyes for paper and leather applications.
• Serves as a standard or reference compound in analytical chemistry and quality control laboratories.

Basic Information

Product Name	8-[(7-Amino-1-Hydroxy-3-Sulpho-2-Naphthyl)Azo]-5-[[4-(Phenylazo)-7-Sulpho-1-Naphthyl]Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	85283-65-4
Molecular Formula	C36H22N6O10S3•Na3 (or related sodium salt form)
Molecular Weight	Contact for details
Synonyms	8-[(7-Amino-1-hydroxy-3-sulfo-2-naphthyl)azo]-5-[[4-(phenylazo)-7-sulfo-1-naphthyl]azo]naphthalene-2-sulfonic acid trisodium salt; C.I. Direct Brown 115; Direct Brown 115; Polyazo dye intermediate; Trisodium 8-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-5-[(4-phenylazo-7-sulphonato-1-naphthyl)azo]naphthalene-2-sulphonate; Azo dye CAS 85283-65-4.
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and purity for downstream synthesis. Quality is verified through advanced analytical techniques including HPLC and spectroscopic methods. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory needs.

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 tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Solubility (in water)	Partially soluble to soluble
Heavy Metals (as Pb)	Max. 20 ppm

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