Description

Pentasodium 5-[[6-amino-1-hydroxy-3-sulphonato-5-[(3-sulphonatophenyl)azo]-2-naphthyl]azo]-6-ethoxy-8-[[7-sulphonato-4-[(3-sulphonatophenyl)azo]naphthyl]azo]naphthalene-2-sulphonate is a high-purity, multi-sulfonated azo dye intermediate. This compound is engineered to deliver exceptional color strength and stability in demanding industrial applications. It is a critical raw material for manufacturers in the textile, ink, and specialty coatings industries seeking vibrant and durable hues.

Application

• Textile Dyeing: Primary application for dyeing natural and synthetic fibers, particularly where high wash and light fastness are required.
• Ink Manufacturing: Used in the formulation of high-performance inks for digital, packaging, and security printing.
• Leather Coloring: Provides deep, uniform coloration for finished leather goods.
• Paper Staining: Employed in the production of specialty colored papers and paper products.
• Plastic and Polymer Coloring: Acts as a colorant for plastics, resins, and synthetic materials.
• Biological Staining: Potential use as a specialized stain in histological and microscopic applications.
• Research & Development: Serves as a key intermediate for synthesizing novel dyes and pigments in chemical research.

Basic Information

Item	Detail
Product Name	Pentasodium 5-[[6-amino-1-hydroxy-3-sulphonato-5-[(3-sulphonatophenyl)azo]-2-naphthyl]azo]-6-ethoxy-8-[[7-sulphonato-4-[(3-sulphonatophenyl)azo]naphthyl]azo]naphthalene-2-sulphonate
CAS No.	83221-48-1
Molecular Formula	C49H28N8Na5O21S5
Molecular Weight	Approx. 1380.0 g/mol
Synonyms	Reactive Black 5 (sodium salt); C.I. 20505; Remazol Black B; Sumifix Black B; Levafix Black EB; Dianix Black BG-FS; Procion Black H-EXL; Polyazo Black Dye Intermediate
EINECS	Contact for details

Quality Control

Our pentasodium azo dye intermediate is manufactured under strict process controls to ensure batch-to-batch consistency and high purity. Quality is verified through a comprehensive suite of analytical methods including HPLC, UV-Vis spectroscopy, and titration. A Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to guarantee 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). This material is hygroscopic (moisture-sensitive); keep the original container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 30.0%
Water Solubility	Completely 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.