Description

7-Amino-1,3-Naphthalenedisulfonic Acid Disodium Salt is a high-purity, water-soluble aromatic intermediate essential for the synthesis of advanced colorants and functional chemicals. Its disulfonic acid salt form offers superior solubility and handling stability, making it a critical building block for specialized manufacturing processes. This compound is primarily required by producers of dyes, pigments, and optical brighteners in the textile, paper, and specialty chemical industries.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of acid dyes, direct dyes, and reactive dyes for textiles and leather.
• Optical Brightener Production: Used in the manufacture of fluorescent whitening agents (FWAs) for paper, detergents, and plastics.
• Chemical Synthesis: Serves as a versatile aromatic intermediate for creating more complex sulfonated compounds and specialty chemicals.
• Research & Development: Employed in academic and industrial R&D for developing new chromophores and functional materials.
• Analytical Reagent: Can be used as a standard or reagent in specific analytical and biochemical applications.

Basic Information

Product Name	7-Amino-1,3-Naphthalenedisulfonic Acid Disodium Salt
CAS No.	842-17-1
Molecular Formula	C₁₀H₇NNa₂O₆S₂
Molecular Weight	363.27 g/mol
Synonyms	7-Amino-1,3-naphthalenedisulfonic acid disodium salt; 1,3-Naphthalenedisulfonic acid, 7-amino-, disodium salt; Acid Red 359; Disodium 7-amino-1,3-naphthalenedisulfonate; 7-Amino-1,3-NDSA disodium salt; 2-Naphthylamine-4,8-disulfonic acid disodium salt; C.I. 18050; KCA
EINECS	212-667-8

Quality Control

Our 7-Amino-1,3-Naphthalenedisulfonic Acid Disodium Salt is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications, including purity, identity, and impurity profile. A Certificate of Analysis (COA) documenting these results is provided with every shipment to guarantee traceability and compliance with your quality 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 product is hygroscopic (moisture-sensitive); keep the original container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Light beige to grayish powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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