Description

Naphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble organic intermediate essential for advanced chemical synthesis. This compound serves as a critical building block for creating complex dyes, pigments, and specialty chemicals with precise functional properties. It is primarily required by manufacturers in the dyestuff, pharmaceutical, and agrochemical industries for producing high-value, performance-driven products.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of acid dyes, reactive dyes, and optical brighteners, particularly for textiles and paper.
• Pharmaceutical Synthesis: Used as a versatile building block for creating sulfonated drug molecules and active pharmaceutical ingredients (APIs).
• Agrochemical Production: Employed in the manufacture of certain herbicides and plant growth regulators requiring specific sulfonic acid functionalities.
• Chemical Research & Development: Serves as a valuable reagent in organic synthesis for introducing disulfonate groups into molecular structures.
• Specialty Surfactants: Can be utilized to produce anionic surfactants with unique solubility and surface-active properties.
• Electroplating Additives: Functions as a brightening agent or complexing agent in specific electroplating bath formulations.

Basic Information

Product Name	Naphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	51770-81-1
Molecular Formula	C₁₀H₆Na₂O₆S₂
Molecular Weight	332.24 g/mol
Synonyms	2,7-Naphthalenedisulfonic Acid, Disodium Salt; Disodium 2,7-Naphthalenedisulfonate; Naphthalene-2,7-disulfonic Acid Disodium Salt; 2,7-NDS Disodium Salt; Acid Yellow 1 Intermediate; C.I. 10316; Naphthalenedisulfonic Acid Sodium Salt (2,7-)
EINECS	257-386-3

Quality Control

Our Naphthalene-2,7-Disulphonic Acid, Sodium Salt is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets stringent specifications for industrial and fine chemical applications. A detailed Certificate of Analysis (COA) is provided with every shipment to guarantee traceability, consistency, and compliance with your technical 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); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect quality and handling properties.

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%
pH (5% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Sulfate Ash	Reported on COA

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