Description

4-[(2-Hydroxy-1-Naphthalenyl)Azo]-2,7-Naphthalenedisulfonic Acid Calcium Salt is a high-purity azo dye intermediate and colorant with significant industrial utility. This compound is valued for its ability to impart stable and vibrant hues, making it a critical component in the production of specialized pigments and dyes. It is primarily sought after by manufacturers in the textile, ink, and specialty coatings industries who require consistent color performance and batch-to-batch reliability.

Application

• Textile Dyeing: As a key intermediate for producing high-quality, wash-fast azo dyes for synthetic and natural fibers.
• Ink Manufacturing: Used in the formulation of industrial and specialty printing inks to achieve specific color shades.
• Pigment Synthesis: Serves as a precursor in the manufacture of organic pigments for plastics and coatings.
• Paper Coloring: Employed in the production of colored papers and paper products.
• Leather Finishing: Applied in dyeing processes for leather goods to ensure deep, uniform color penetration.
• Research & Development: Utilized in chemical research as a standard or reagent for developing new colorant technologies.

Basic Information

Product Name	4-[(2-Hydroxy-1-Naphthalenyl)Azo]-2,7-Naphthalenedisulfonic Acid Calcium Salt
CAS No.	73019-25-7
Molecular Formula	C20H12CaN2O7S2
Molecular Weight	488.51 g/mol
Synonyms	Calcium 4-[(2-hydroxy-1-naphthyl)azo]-2,7-naphthalenedisulfonate; C.I. Mordant Yellow 5, calcium salt; Acid Yellow 99; Mordant Yellow 5; 2,7-Naphthalenedisulfonic acid, 4-[(2-hydroxy-1-naphthalenyl)azo]-, calcium salt (1:1); C.I. 14170; Calcium 2-hydroxy-1-naphthylazo-2,7-naphthalenedisulfonate
EINECS	Contact for details

Quality Control

Our production of 4-[(2-Hydroxy-1-Naphthalenyl)Azo]-2,7-Naphthalenedisulfonic Acid Calcium Salt adheres to stringent quality protocols to ensure it meets the high standards required for industrial dye and pigment synthesis. Every batch is analyzed using advanced techniques like HPLC and spectrophotometry to verify identity, purity, and color strength. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory compliance needs.

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 when not in use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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