Description

C. I. Pigment Red 56 is a high-performance, monoazo-based organic pigment renowned for its bright, yellowish-red hue and excellent color strength. This pigment is valued for its good dispersibility and cost-effectiveness, making it a preferred choice for mass coloration applications. It is primarily utilized in the plastics, printing inks, and coatings industries where a durable and economical red shade is required.

Application

• Coloration of polyolefins (PP, PE), PVC, and other engineering plastics.
• Manufacturing of offset, flexographic, and gravure printing inks.
• Industrial and decorative coatings and paints, including emulsion paints.
• Coloring of synthetic fibers and spin dyeing.
• Pigmentation for rubber and elastomeric products.
• Used in the coloration of paper and paper coatings.
• Applications in artist colors and specialty inks.

Basic Information

Product Name	C. I. Pigment Red 56
CAS No.	25310-96-7
Molecular Formula	C18H12N4O6S2 · 1/2 Ba
Molecular Weight	Contact for details
Synonyms	Pigment Red 56; C.I. 15850; 1-[(4-Methyl-2-nitrophenyl)azo]-2-naphthalenol Barium Salt; Lithol Rubine Barium Salt; Permanent Red FGR; Permanent Red FGR 70; Red 56; C.I. Pigment Red 56 (Barium Lake)
EINECS	246-816-0

Quality Control

Our C. I. Pigment Red 56 is manufactured under a stringent quality management system. Each batch is tested against rigorous internal specifications for key parameters such as color strength, hue, particle size distribution, and chemical stability to ensure consistent batch-to-batch performance. Certificates of Analysis (COA) detailing these results are available upon request.

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 incompatible materials and sources of ignition.

Specification

Item	Specification
Appearance	Red Powder
Color Strength	95 - 105% (vs. Standard)
Hue	Within agreed tolerance
Residue on Sieve (45μm)	≤ 1.0%
Volatile Matter (at 105°C)	≤ 2.0%
pH Value (10% Aqueous Slurry)	6.0 - 8.0
Oil Absorption	40 - 60 g/100g
Lightfastness (1-8)	≥ 5
Heat Resistance (°C)	≥ 180

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