Description

6-[(2-Hydroxy-1-Naphthalenyl)Azo]-2-Naphthalenesulfonic Acid, Calcium Salt (2:1) is a high-purity, synthetic organic pigment and dye intermediate. This compound is valued for its excellent color properties and stability, making it a critical component in the production of high-performance pigments. It is primarily sought by manufacturers in the coatings, plastics, inks, and specialty textile dyeing industries for its ability to impart durable and vibrant hues.

Application

• Pigment Manufacturing: A key intermediate for producing high-performance organic pigments, particularly for automotive and industrial coatings.
• Plastics Coloring: Used in the masterbatch and compounding of engineering plastics and polymers requiring stable coloration.
• Printing Inks: Imparts color in high-quality printing inks for packaging and publications.
• Textile Dyes: Serves as a precursor for dyes used in specialty and high-fastness textile applications.
• Lacquers and Paints: Provides durable color in solvent-based and other industrial paint formulations.
• Research & Development: Used as a reference standard and building block in chemical synthesis for novel colorants.

Basic Information

Product Name	6-[(2-Hydroxy-1-Naphthalenyl)Azo]-2-Naphthalenesulfonic Acid, Calcium Salt (2:1)
CAS No.	73612-32-5
Molecular Formula	C40H26CaN4O6S2
Molecular Weight	770.86 g/mol
Synonyms	Calcium 6-[(2-hydroxy-1-naphthyl)azo]-2-naphthalenesulfonate; C.I. Pigment Red 57:1; Lithol Rubine B Ca; Permanent Carmine FBB; Permanent Red FGR; Permanent Red FR; Naphthol Red; Calcium Lithol Rubine
EINECS	Contact for details

Quality Control

Our production of 6-[(2-Hydroxy-1-Naphthalenyl)Azo]-2-Naphthalenesulfonic Acid, Calcium Salt (2:1) adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and physical properties. Certificates of Analysis (COA) detailing assay, impurity profile, and other critical parameters are available upon request to support your quality assurance protocols.

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). This material is hygroscopic (moisture-sensitive); ensure containers are kept sealed to prevent absorption of atmospheric moisture.

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 suspension)	6.0 - 8.0

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