Description

Disodium [1-[(5-Chloro-2-Hydroxyphenyl)Azo]-2-Naphtholato(2-)][3-Hydroxy-4-[(2-Hydroxy-1-Naphthyl)Azo]Naphthalene-1-Sulphonato(3-)]Chromate(2-) is a high-purity, complex chromium azo dye lake, also known as Pigment Red 57:1. This compound is valued for its excellent tinting strength, chemical stability, and vibrant, durable red color. It is an essential industrial pigment primarily required by manufacturers in the printing, plastics, and coatings sectors for consistent, high-quality coloration. Our global supply ensures reliable access to this critical material for demanding B2B applications.

Application

This chromium-based azo pigment is engineered for performance in a variety of industrial systems. Its primary applications include:

• Printing Inks: A key component for offset, gravure, and flexographic inks, providing sharp, non-bleeding red shades.
• Plastics Coloring: Used for the mass coloration of polyolefins (PP, PE), PVC, and other polymers, offering good heat stability and dispersion.
• Industrial Coatings and Paints: Imparts durable red color to industrial finishes, architectural paints, and primers.
• Paper Coatings: Employed in surface coloring and coating formulations for decorative and packaging papers.
• Masterbatch Production: A concentrated colorant for creating pigment masterbatches used in plastic processing.
• Specialty Applications: Suitable for use in colored pencils, chalks, and other specialty artist materials.

Basic Information

Item	Details
Product Name	Disodium [1-[(5-Chloro-2-Hydroxyphenyl)Azo]-2-Naphtholato(2-)][3-Hydroxy-4-[(2-Hydroxy-1-Naphthyl)Azo]Naphthalene-1-Sulphonato(3-)]Chromate(2-)
CAS No.	75214-56-1
Molecular Formula	C34H18ClCrN4Na2O8S
Molecular Weight	777.93 g/mol
Synonyms	Pigment Red 57:1; C.I. 15850:1; Lithol Rubine BK; Calcium Lithol Rubine; Disodium 5-[(5-chloro-2-hydroxyphenyl)azo]-6-hydroxy-2-naphthalenesulfonate chromium complex; [1-[(5-Chloro-2-hydroxyphenyl)azo]-2-naphthalenolato(2-)][3-hydroxy-4-[(2-hydroxy-1-naphthalenyl)azo]-1-naphthalenesulfonato(3-)]chromate(2-) disodium salt
EINECS	Contact for details

Quality Control

Our production of Pigment Red 57:1 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance. Every lot is tested against critical parameters including color strength, hue, particle size distribution, and chemical purity. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all test results. Our quality systems are designed to meet the demands of global supply chains, with a focus on REACH compliance and other relevant international regulatory standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect flow properties and performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Red Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Moisture Content	≤ 2.0%
Residue on Sieve (45μm)	≤ 1.0%
Water Soluble Matter	≤ 1.5%
Heavy Metals (as Pb)	≤ 50 ppm
Arsenic (As)	≤ 3 ppm

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