Description

1-Naphthol-2,7-Disulfonic Acid is a key aromatic sulfonic acid derivative, primarily serving as a versatile intermediate in the synthesis of dyes, pigments, and other fine chemicals. Its value lies in the strategic positioning of its sulfonic acid groups, which impart excellent water solubility and reactivity for further chemical transformations. This compound is essential for manufacturers in the dyestuff, textile, and specialty chemical industries seeking to produce high-performance colorants and functional intermediates.

Application

• Dye and Pigment Intermediate: A crucial building block for the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for coloring wool, silk, and nylon.
• Coupling Agent: Used in diazo coupling reactions to produce azo dyes and pigments with specific color shades and properties.
• Chemical Synthesis: Serves as a starting material or intermediate in the production of more complex sulfonated naphthalene derivatives for various industrial applications.
• Research & Development: Employed in laboratory settings for the development of new chromophores, fluorescent markers, or specialty organic compounds.
• Textile Auxiliaries: Potential use in the formulation of textile processing aids where sulfonated compounds are required for leveling or dispersing properties.

Basic Information

Product Name	1-Naphthol-2,7-Disulfonic Acid
CAS No.	6470-96-8
Molecular Formula	C₁₀H₈O₇S₂
Molecular Weight	304.30 g/mol
Synonyms	1-Naphthol-2,7-disulfonic acid; 2,7-Naphthalenedisulfonic acid, 1-hydroxy-; 1-Hydroxynaphthalene-2,7-disulfonic acid; 7-Hydroxy-1,3-naphthalenedisulfonic acid; NSC 40326; 2,7-Disulfo-1-naphthol; 1-Naphthol-2,7-disulphonic acid
EINECS	229-298-7

Quality Control

Our 1-Naphthol-2,7-Disulfonic Acid is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. We employ advanced analytical techniques, including HPLC and titration, to verify critical parameters such as assay and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment to support your quality assurance processes.

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) and should be kept away from strong acids and organic solvents. Keep the container tightly sealed when not in use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light brown powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	≤ 0.5%

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