Description

Disodium 4-Ethoxy-5-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, water-soluble naphthalene derivative characterized by its disulphonate and ethoxy-hydroxyl functional groups. This compound serves as a critical intermediate and functional additive in advanced chemical synthesis, valued for its ability to impart solubility, stability, and specific reactivity. It is essential for manufacturers in the pharmaceutical, specialty dye, and fine chemical industries requiring precise molecular building blocks for complex formulations.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring naphthalene-based scaffolds with enhanced water solubility.
• Dye and Pigment Manufacturing: Acts as a key intermediate for producing acid dyes, reactive dyes, and other colorants where sulphonate groups improve solubility and fiber affinity.
• Chemical Research & Development: Serves as a versatile building block in organic synthesis for creating novel compounds in academic and industrial R&D settings.
• Analytical Reagent: Potential use as a standard or reagent in analytical chemistry methods due to its defined structure and purity.
• Specialty Surfactant Precursor: Can be utilized in the development of specialty surfactants and dispersants for niche industrial applications.
• Photographic Chemical: May find application as a component in specialized photographic developers or other light-sensitive formulations.

Basic Information

Product Name	Disodium 4-Ethoxy-5-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	6272-19-1
Molecular Formula	C₁₂H₁₀Na₂O₉S₂
Molecular Weight	424.30 g/mol
Synonyms	4-Ethoxy-5-hydroxy-2,7-naphthalenedisulfonic acid disodium salt; 2,7-Naphthalenedisulfonic acid, 4-ethoxy-5-hydroxy-, disodium salt; Disodium 4-ethoxy-5-hydroxynaphthalene-2,7-disulfonate; 5-Hydroxy-4-ethoxynaphthalene-2,7-disulfonic acid disodium salt; Acid Red 246 (related dye class); C.I. 16295; Ethoxyhydroxynaphthalenedisulfonate disodium salt
EINECS	Contact for details

Quality Control

Our Disodium 4-Ethoxy-5-Hydroxynaphthalene-2,7-Disulphonate is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. We provide comprehensive Certificates of Analysis (COA) upon request, detailing purity, identity, and impurity profiles. Our quality commitment supports applications requiring high consistency and traceability.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

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

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