Description

3-Hydroxy-4-[(2-Sulfo-1-Naphthalenyl)Azo]-2-Naphthalenecarboxylic Acid Calcium Salt is a high-purity azo dye intermediate and pigment precursor. This compound is valued for its role in producing vivid, stable colorants with excellent light and chemical fastness properties. It is primarily required by manufacturers in the pigments, dyes, and specialty chemical synthesis industries for creating high-performance color products.

Application

• Primary Intermediate for the synthesis of high-grade, calcium-based azo pigments and dyes.
• Colorant Production for industrial paints, coatings, and inks requiring enhanced durability.
• Specialty Dye Manufacturing for applications in plastics and synthetic fibers.
• Research & Development of novel chromophores and functional materials in academic and industrial labs.
• Quality Control Reference Standard for analytical testing within pigment production facilities.

Basic Information

Item	Details
Product Name	3-Hydroxy-4-[(2-Sulfo-1-Naphthalenyl)Azo]-2-Naphthalenecarboxylic Acid Calcium Salt
CAS No.	73019-27-9
Molecular Formula	C21H12CaN2O6S
Molecular Weight	460.46 g/mol
Synonyms	Calcium 3-hydroxy-4-[(2-sulfo-1-naphthyl)azo]-2-naphthoate; C.I. Pigment Red 57:1; Calcium Lithol Rubine; Permanent Carmine FBB; Permanent Red FGR; Permanent Red FR; 2-Naphthalenecarboxylic acid, 3-hydroxy-4-[(2-sulfo-1-naphthalenyl)azo]-, calcium salt (1:1); C.I. 15850:1
EINECS	Contact for details

Quality Control

Our production of 3-Hydroxy-4-[(2-Sulfo-1-Naphthalenyl)Azo]-2-Naphthalenecarboxylic Acid Calcium Salt adheres to stringent quality protocols to ensure batch-to-batch consistency and performance. The material is manufactured under a quality management system and is characterized to meet precise technical specifications for color strength, hue, and purity. Certificates of Analysis (COA) detailing identity, assay, and impurity profiles are 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). Keep away from strong oxidizing agents. The product is light-sensitive and should be stored away from light to maintain stability.

Specification

Item	Specification
Appearance	Red to violet powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Slightly soluble in water; insoluble in most organic solvents

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