Description

5-Hydroxy-4-[[(6-Hydroxy-2-Naphthyl)Sulphonyl]Amino]Naphthalene-1,7-Disulphonic Acid is a high-purity, multi-functional naphthalene-based intermediate with significant industrial utility. Its complex molecular structure, featuring multiple sulphonic acid and hydroxy groups, makes it a valuable precursor for synthesizing specialized dyes, pigments, and optical brighteners. This compound is essential for manufacturers in the colorant and specialty chemical industries seeking to develop products with enhanced color fastness, solubility, and specific spectral properties. The CAS number for this compound is provided in the table below.

Application

• Dye and Pigment Intermediate: A key building block for the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for textiles like wool, silk, and nylon.
• Optical Brightener Production: Used in the manufacture of fluorescent whitening agents (FWAs) for paper, detergents, and plastics.
• Specialty Chemical Synthesis: Serves as a versatile intermediate for creating complex sulfonated compounds used in various high-performance applications.
• Research & Development: Employed in chemical R&D for developing new functional materials with specific chromophoric or auxochromic properties.
• Analytical Reagent: Can be utilized as a standard or reagent in analytical chemistry for method development and calibration.

Basic Information

Product Name	5-Hydroxy-4-[[(6-Hydroxy-2-Naphthyl)Sulphonyl]Amino]Naphthalene-1,7-Disulphonic Acid
CAS No.	6535-71-3
Molecular Formula	C₂₀H₁₅NO₉S₃
Molecular Weight	525.53 g/mol
Synonyms	5-Hydroxy-4-[(6-hydroxy-2-naphthyl)sulfonylamino]naphthalene-1,7-disulfonic acid; 4-Amino-5-hydroxy-1,7-naphthalenedisulfonic acid, N-(6-hydroxy-2-naphthyl)sulfonyl-; 1,7-Naphthalenedisulfonic acid, 4-[[(6-hydroxy-2-naphthyl)sulfonyl]amino]-5-hydroxy-; Acid Brown 14 intermediate; Dye intermediate CAS 6535-71-3
EINECS	229-452-5

Quality Control

Our production of 5-Hydroxy-4-[[(6-Hydroxy-2-Naphthyl)Sulphonyl]Amino]Naphthalene-1,7-Disulphonic Acid adheres to stringent quality management protocols. Every batch is subjected to comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistent quality and reliable performance for your synthesis processes. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting all critical specifications.

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). This compound is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	Light yellow to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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