Description

7-Hydroxy-8-[(4-Sulpho-1-Naphthyl)Azo]Naphthalene-1,3,6-Trisulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate and analytical reagent. This compound is valued for its strong chromophoric properties and ability to form stable complexes with various metal ions, making it essential for precise colorimetric analysis and specialty dye synthesis. It is primarily sought by manufacturers and R&D laboratories in the analytical chemistry, textile dye, and specialty chemical sectors for applications requiring consistent quality and reliable performance.

Application

• Analytical Reagent: Used as a sensitive colorimetric indicator and complexometric agent in the quantitative analysis of metal ions, particularly in water testing and environmental monitoring.
• Dye Intermediate: Serves as a key precursor in the synthesis of acid dyes and direct dyes for coloring textiles like wool, silk, and nylon.
• Biological Staining: Employed in histological and cytological staining procedures for microscopic examination in life science research.
• Ink Formulation: A component in the manufacture of specialized inks, including those for security printing and high-performance markers.
• Photographic Industry: Used in certain color photographic processes and sensitizers.
• Research & Development: A valuable tool in chemical research for studying azo coupling reactions and developing new chromogenic sensors.

Basic Information

Item	Details
Product Name	7-Hydroxy-8-[(4-Sulpho-1-Naphthyl)Azo]Naphthalene-1,3,6-Trisulphonic Acid, Sodium Salt
CAS No.	85283-68-7
Molecular Formula	C20H11N2Na4O13S4
Molecular Weight	758.52 g/mol (as sodium salt)
Synonyms	Acid Red 186 (C.I. 18810); 7-Hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-1,3,6-naphthalenetrisulfonic acid, tetrasodium salt; C.I. 18810; Naphthalene trisulfonic acid azo derivative; Tetrasodium 7-hydroxy-8-[(4-sulphonato-1-naphthyl)azo]naphthalene-1,3,6-trisulphonate; 1,3,6-Naphthalenetrisulfonic acid, 7-hydroxy-8-[(4-sulfo-1-naphthyl)azo]-, sodium salt (1:4); Azo Rubine S; Acid Leather Red BG
EINECS	Contact for details

Quality Control

Our production of 7-Hydroxy-8-[(4-Sulpho-1-Naphthyl)Azo]Naphthalene-1,3,6-Trisulphonic Acid, Sodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) detailing batch-specific results are available upon request 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 sealed to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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