Description

4-[(4-Ethoxy-2-Sulphophenyl)Azo]-3-Hydroxynaphthalene-2,7-Disulphonic Acid, Calcium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing vibrant and stable colorants, particularly in applications requiring specific hue and fastness properties. It is primarily required by manufacturers in the dye and pigment industries for producing specialized inks, textile dyes, and colorants for various substrates.

Application

• Primary intermediate for the synthesis of acid dyes and direct dyes used in textile coloration.
• Key component in manufacturing pigments and lakes for inks, including printing and packaging inks.
• Used in the production of paper colorants and specialty coatings.
• Potential intermediate for biological stains and histochemical dyes in laboratory settings.
• Research and development of novel functional dyes for advanced materials.
• Starting material for colorants in leather finishing applications.

Basic Information

Product Name	4-[(4-Ethoxy-2-Sulphophenyl)Azo]-3-Hydroxynaphthalene-2,7-Disulphonic Acid, Calcium Salt
CAS No.	84696-59-3
Molecular Formula	C18H12CaN2O12S3
Molecular Weight	584.58 g/mol
Synonyms	Calcium 4-[(4-ethoxy-2-sulfophenyl)azo]-3-hydroxy-2,7-naphthalenedisulfonate; C.I. Acid Yellow 99; Acid Yellow 99; C.I. 13900; 3-Hydroxy-4-[(2-sulfo-4-ethoxyphenyl)azo]-2,7-naphthalenedisulfonic acid calcium salt; Yellow 2G; Azo dye intermediate YA
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high chemical purity. Quality is verified through comprehensive analytical testing, including HPLC for assay and impurity profiling. A Certificate of Analysis (COA) detailing purity, identity, and physical specifications is provided with every shipment to guarantee 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 ambient temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent absorption of atmospheric moisture, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95.0%
Loss on Drying	Max. 5.0%
Sulfated Ash	Conforms
Heavy Metals (as Pb)	Max. 20 ppm
Water Solubility	Freely soluble

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