Description

Trisodium 5-Amino-4-Hydroxy-3-[(1-Sulphonato-2-Naphthyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. Its multi-sulfonated structure provides excellent solubility and substantivity, making it a critical building block for high-performance dyes. This compound is primarily utilized by manufacturers in the textile, ink, and specialty chemical industries seeking to develop advanced coloring agents with superior fastness properties.

Application

• Primary Intermediate for Reactive Dyes: Key precursor in the synthesis of reactive dyes for cotton, wool, and nylon, offering brilliant shades and excellent wash-fastness.
• Direct Dye Manufacturing: Used in the production of direct dyes for paper and cellulose-based materials, providing strong affinity and color yield.
• Food, Drug, and Cosmetic (FD&C) Colorants: Serves as an intermediate for certain certified colorants where its high purity is essential for safety and regulatory compliance.
• Inkjet and Digital Printing Inks: A crucial component in formulating high-quality inks that require precise color matching and stability.
• Biological Staining Reagents: Used in the synthesis of histological stains and indicators for laboratory and diagnostic applications.
• Research & Development: Employed in chemical research for developing new chromophores and studying azo dye chemistry and photostability.

Basic Information

Product Name	Trisodium 5-Amino-4-Hydroxy-3-[(1-Sulphonato-2-Naphthyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	5045-23-8
Molecular Formula	C20H11N3Na3O11S3
Molecular Weight	662.46 g/mol
Synonyms	Acid Black 1; Naphthalene Black 12B; C.I. 20470; 5-Amino-4-hydroxy-3-[(1-sulfo-2-naphthyl)azo]-2,7-naphthalenedisulfonic acid trisodium salt; Trisodium 1-amino-2-(1-sulfo-2-naphthylazo)-6,8-dihydroxynaphthalene-3,7-disulfonate; Azo Black; C.I. Acid Black 1; Amido Black 10B (related).
EINECS	225-730-4

Quality Control

Our production of Trisodium 5-Amino-4-Hydroxy-3-[(1-Sulphonato-2-Naphthyl)Azo]Naphthalene-2,7-Disulphonate adheres to stringent quality management systems to ensure batch-to-batch consistency and reliability. The material is subjected to rigorous analytical testing, including HPLC for purity, spectrophotometry for color strength, and tests for residual solvents and heavy metals. Certificates of Analysis (COA) detailing all specifications are 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect purity and performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	98 - 102% (vs. Standard)
Water Content (KF)	≤ 5.0%
Ash Content	≤ 20.0%
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.