Description

Calcium 2-[(2-Hydroxy-1-Naphthyl)Azo]-5-Methylbenzenesulphonate is a high-purity azo dye intermediate and pigment component. This compound is valued for its ability to impart stable, vivid coloration in demanding industrial applications. It is primarily required by manufacturers in the pigments, inks, coatings, and specialty chemical synthesis sectors.

Application

• Primary Pigment Manufacturing: A key intermediate for producing high-performance organic pigments, particularly for printing inks and industrial coatings.
• Textile Dyeing: Used in the synthesis of dyes for coloring synthetic and natural fibers, offering good light and wash fastness.
• Plastics and Polymers: Imparts coloration to a variety of plastic resins and polymer masterbatches.
• Specialty Inks: A component in the formulation of specialty inks, including those for packaging and security printing.
• Research & Development: Serves as a crucial building block in chemical R&D for developing new colorants and functional materials.
• Analytical Chemistry: Can be employed as a colorimetric reagent or indicator in specific analytical procedures.

Basic Information

Product Name	Calcium 2-[(2-Hydroxy-1-Naphthyl)Azo]-5-Methylbenzenesulphonate
CAS No.	100063-59-0
Molecular Formula	C34H24CaN4O6S2
Molecular Weight	704.78 g/mol
Synonyms	Calcium 2-[(2-hydroxy-1-naphthyl)azo]-5-methylbenzenesulfonate; 5-Methyl-2-[(2-hydroxy-1-naphthyl)azo]benzenesulfonic Acid Calcium Salt; C.I. Pigment Red 57:1 Calcium Salt; Lithol Rubine BCA; Pigment Red 57:1; Calcium Lithol Rubine; Naphthol Red; Calcium 4B Toner
EINECS	Contact for details

Quality Control

Our production of Calcium 2-[(2-Hydroxy-1-Naphthyl)Azo]-5-Methylbenzenesulphonate adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. The material is manufactured under ISO-certified conditions, with quality verified against established internal specifications for purity, color strength, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing assay, identification, and physical property tests is provided with every shipment.

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 tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Red to violet powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water-soluble Matter	≤ 1.0%
pH (Aqueous Slurry)	6.0 - 8.0

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