Description

Calcium Bis[2-Chloro-6-[(2-Hydroxy-1-Naphthyl)Azo]Toluene-4-Sulphonate] is a high-performance, organometallic azo dye complex valued for its intense color properties and stability. This compound is essential for industries requiring durable, vivid pigments that can withstand demanding processing conditions. It is primarily utilized by manufacturers in the plastics, synthetic fibers, and specialty coatings sectors seeking consistent and reliable coloration.

Application

• Plastics and Polymer Coloration: Used as a masterbatch pigment for coloring polyolefins (PP, PE), PVC, and engineering plastics, offering excellent heat stability and dispersion.
• Synthetic Fiber Dyeing: Imparts deep, wash-fast colors to polyester, nylon, and acrylic fibers during melt spinning or solution dyeing processes.
• Industrial Coatings and Inks: Provides vibrant, weather-resistant pigmentation for industrial paints, powder coatings, and specialty printing inks.
• Non-Food Contact Materials: Suitable for coloring packaging materials, household goods, and automotive interior components where food contact is not required.
• Lacquers and Resins: Incorporated into solvent-based systems and synthetic resins to achieve transparent or opaque shades with good lightfastness.

Basic Information

Product Name	Calcium Bis[2-Chloro-6-[(2-Hydroxy-1-Naphthyl)Azo]Toluene-4-Sulphonate]
CAS No.	68189-24-2
Molecular Formula	C34H20CaCl2N4O8S2
Molecular Weight	791.72 g/mol
Synonyms	Calcium 2-Chloro-6-[(2-hydroxy-1-naphthyl)azo]toluene-4-sulphonate complex; C.I. Pigment Red 48:2 (Calcium Lake); Pigment Red 48:2; Calcium Lake of 2B Red; Lithol Rubine BK Calcium Salt; Naphthol Red Calcium Salt; 2-Chloro-5-methyl-4-sulfobenzenediazonium, hydroxide, inner salt, calcium complex with 2-naphthol; C.I. 15865:2
EINECS	Contact for details

Quality Control

Our production of Calcium Bis[2-Chloro-6-[(2-Hydroxy-1-Naphthol)Azo]Toluene-4-Sulphonate] adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance. Every lot is tested against key parameters for color strength, purity, and physical properties. Certificates of Analysis (COA) documenting these results 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, well-ventilated area at ambient temperature (15-25°C). Keep away from strong oxidizing agents. The container should be kept tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content (KF)	≤ 3.0%
Ash Content	Contact for details
Particle Size (D50)	< 10 µm
Heavy Metals (as Pb)	≤ 20 ppm

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