Description

3-Hydroxy-4-[(1-Hydroxy-2-Naphthyl)Azo]Naphthalene-1-Sulphonic Acid CAS NO 25747-05-1 is a high-purity azo dye intermediate characterized by its specific naphthalene sulphonic acid structure. This compound is critical for synthesizing high-value, colorfast dyes and pigments, offering excellent tinctorial strength and stability. It is primarily required by manufacturers in the specialty chemicals, textile dyeing, and advanced material research sectors.

Application

• Primary intermediate for the synthesis of azo dyes and pigments used in textiles and inks.
• Key component in the production of colorants for plastics and polymers.
• Used in research and development of functional dyes for optical and electronic applications.
• Potential use as a complexometric indicator or analytical reagent in laboratory settings.
• Raw material for creating specialty inks for security printing or high-resolution imaging.
• Intermediate in the synthesis of light-sensitive materials for photographic or photoresist applications.

Basic Information

Product Name	3-Hydroxy-4-[(1-Hydroxy-2-Naphthyl)Azo]Naphthalene-1-Sulphonic Acid
CAS No.	25747-05-1
Molecular Formula	C₂₀H₁₄N₂O₅S
Molecular Weight	394.40 g/mol
Synonyms	1-Naphthalenesulfonic acid, 3-hydroxy-4-[(1-hydroxy-2-naphthalenyl)azo]-; C.I. Mordant Orange 6; Acid Orange 6; 3-Hydroxy-4-[(1-hydroxy-2-naphthyl)azo]-1-naphthalenesulfonic acid; 4-[(1-Hydroxy-2-naphthyl)azo]-3-hydroxy-1-naphthalenesulfonic acid; Mordant Orange 6; 25747-05-1; 3-Hydroxy-4-(1-hydroxy-2-naphthylazo)naphthalene-1-sulfonic acid
EINECS	Contact for details

Quality Control

Our production of 3-Hydroxy-4-[(1-Hydroxy-2-Naphthyl)Azo]Naphthalene-1-Sulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting industry and customer-specific specifications. A detailed Certificate of Analysis (COA) is provided with each shipment to guarantee traceability and consistent quality.

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.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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