Description

7-Anilino-4-Hydroxy-2-Naphthalenesulfonic Acid is a key naphthalene-based sulfonic acid derivative, valued for its role as a versatile chemical intermediate. Its molecular structure makes it particularly significant in the synthesis of dyes, pigments, and functional organic compounds. This product is essential for manufacturers and R&D laboratories in the colorant, specialty chemical, and pharmaceutical industries seeking high-purity intermediates for complex synthesis.

Application

• Dye and Pigment Intermediate: A crucial building block for the synthesis of azo dyes, acid dyes, and other complex colorants.
• Chemical Synthesis: Used as a key intermediate in organic synthesis for creating more complex sulfonated aromatic compounds.
• Analytical Reagent: Employed in research and analytical chemistry as a reagent or standard for method development.
• Pharmaceutical Intermediate: Potential use in the synthesis of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Photographic Chemicals: Can be utilized in the formulation of certain photographic chemicals and sensitizers.
• Corrosion Inhibitor Formulation: A component in specialty formulations for metal treatment and protection.

Basic Information

Product Name	7-Anilino-4-Hydroxy-2-Naphthalenesulfonic Acid
CAS No.	119-40-4
Molecular Formula	C₁₆H₁₃NO₄S
Molecular Weight	315.34 g/mol
Synonyms	7-Anilino-4-hydroxy-2-naphthalenesulfonic acid; 4-Hydroxy-7-(phenylamino)-2-naphthalenesulfonic acid; 7-Anilino-4-hydroxy-2-naphthalenesulphonic acid; 7-Phenylamino-4-hydroxy-2-naphthalenesulfonic acid; N-Phenyl-4-hydroxy-2,7-naphthalenedisulfonamide (related); 1-Hydroxy-4-anilino-6-naphthalenesulfonic acid; C.I. 37515; Acid Blue 92 intermediate
EINECS	204-322-6

Quality Control

Our 7-Anilino-4-Hydroxy-2-Naphthalenesulfonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide detailed Certificates of Analysis (COA) with key parameters including assay, impurity profile, and physical characteristics. Our quality commitment ensures the material meets the stringent requirements for use as a high-value intermediate in sensitive synthesis 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). Keep away from strong oxidizing agents, strong bases, and incompatible materials. The product may be hygroscopic (moisture-sensitive).

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)	Individual impurity ≤ 0.5%, Total impurities ≤ 2.0%

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