Description

Calcium 4-[(4-Chloro-3-Sulphonatophenyl)Azo]-3-Hydroxy-2-Naphthoate CAS NO 7538-59-2 is a high-purity azo dye intermediate and pigment, specifically a calcium salt of a naphthol derivative. This compound is valued for its excellent color fastness and stability, making it a critical component in the production of high-performance pigments. It is primarily utilized by manufacturers in the coatings, plastics, and specialty inks industries seeking durable and vibrant colorants. Our supply ensures consistent quality and reliable performance for demanding industrial applications.

Application

• Primary intermediate for the synthesis of high-performance azo pigments and dyes.
• Colorant for industrial coatings and paints requiring weather resistance.
• Pigment for coloring plastics and synthetic polymers.
• Manufacturing of specialty printing inks, including for packaging and security applications.
• Potential use in the coloration of textiles and synthetic fibers.
• Research and development of novel functional materials in academic and industrial labs.

Basic Information

Item	Details
Product Name	Calcium 4-[(4-Chloro-3-Sulphonatophenyl)Azo]-3-Hydroxy-2-Naphthoate
CAS No.	7538-59-2
Molecular Formula	C17H9ClN2O6SCa
Molecular Weight	444.87 g/mol
Synonyms	Calcium 4-[(4-Chloro-3-sulfophenyl)azo]-3-hydroxy-2-naphthoate; C.I. Pigment Red 57:1; Calcium Red 2B; Lithol Rubine B Ca; Permanent Red FGR; 4-[(4-Chloro-3-sulfophenyl)azo]-3-hydroxy-2-naphthoic acid calcium salt; Naphthol AS Red; Calcium Lithol Rubine
EINECS	231-409-6

Quality Control

Our production of Calcium 4-[(4-Chloro-3-Sulphonatophenyl)Azo]-3-Hydroxy-2-Naphthoate adheres to stringent quality protocols to ensure batch-to-batch consistency and performance. The product undergoes rigorous testing, including purity assay, shade strength, and physical property analysis, to meet the specifications required for pigment manufacturing. Certificates of Analysis (COA) documenting all critical parameters are available upon request 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water-soluble Matter	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Shade & Strength	Within agreed standard

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