Description

4-Amino-5-Hydroxy-2,7-Naphthalenedisulfonic Acid is a high-purity, functionalized naphthalene derivative that serves as a critical intermediate in advanced organic synthesis. Its bifunctional structure, featuring both amino and hydroxy groups on a disulfonated aromatic core, makes it a versatile building block for creating complex molecules with tailored properties. This compound is essential for manufacturers in the dye, pigment, and specialty chemical industries seeking to develop products with enhanced solubility, chromophoric strength, or biological activity.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of acid dyes, reactive dyes, and food colorants, contributing to color fastness and solubility.
• Pharmaceutical Synthesis: Used as a building block for active pharmaceutical ingredients (APIs) and diagnostic agents due to its functional handles for conjugation.
• Chemical Research & Development: Employed in academic and industrial R&D for creating novel polymers, ligands, and metal-organic frameworks (MOFs).
• Analytical Reagent: Can be utilized in the preparation of reagents for spectrophotometric analysis and biochemical assays.
• Specialty Surfactants: Acts as a starting material for synthesizing anionic surfactants with specific hydrophilic-lipophilic balance (HLB) properties.
• Photographic Chemicals: Finds application in the formulation of certain photographic developers and sensitizers.

Basic Information

Product Name	4-Amino-5-Hydroxy-2,7-Naphthalenedisulfonic Acid
CAS No.	312693-54-2
Molecular Formula	C₁₀H₉NO₈S₂
Molecular Weight	335.31 g/mol
Synonyms	2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-; 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid; 5-Amino-4-hydroxynaphthalene-2,7-disulfonic acid; 4-Amino-5-hydroxy-2,7-naphthalenedisulfonate; 1-Amino-8-hydroxynaphthalene-3,6-disulfonic acid (alternative numbering); 4,5-Dihydroxyaminonaphthalene-2,7-disulfonic acid; Azoic diazo component intermediate
EINECS	Contact for details

Quality Control

Our production of 4-Amino-5-Hydroxy-2,7-Naphthalenedisulfonic Acid adheres to stringent quality management protocols. Every batch is analyzed to confirm identity, purity, and consistency using advanced techniques like HPLC and NMR. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all relevant specifications. Our quality system is designed to meet the rigorous demands of pharmaceutical and fine chemical applications, ensuring traceability and reliability for our global partners.

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 product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect purity and performance. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Off-white to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solubility (1% in Water)	Clear, yellow to brown solution

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