Description

Pigment Red 81:3 is a high-performance, precipitated calcium salt of a red azo pigment. This compound is valued for its excellent color strength, good lightfastness, and strong solvent resistance, making it a reliable choice for demanding coloration applications. It is primarily used by manufacturers in the coatings, plastics, and printing ink industries seeking vibrant, durable red shades.

Application

• Industrial and automotive coatings and paints.
• Coloration of plastics, including PVC, polyolefins, and engineering resins.
• Manufacturing of printing inks for packaging and publications.
• Pigmentation of masterbatches and color concentrates.
• Coloring of synthetic fibers and textiles.
• Use in specialty artists' colors and colored pencils.

Basic Information

Product Name	Pigment Red 81:3
CAS No.	68310-07-6
Molecular Formula	C34H28CaN8O8S2
Molecular Weight	780.88 g/mol
Synonyms	Pigment Red 81 Calcium Salt; C.I. 45160:3; Calcium 4-[(2-hydroxy-1-naphthyl)azo]-3-methylbenzenesulfonate-1-naphthalenesulfonate complex; Lithol Rubine BK; Permanent Carmine FBB; Red 81:3; C.I. Pigment Red 81:3; Pigment Red 81 Calcium Lake
EINECS	Contact for details

Quality Control

Our Pigment Red 81:3 is manufactured under a rigorous quality management system. Each batch is tested to ensure consistent coloristic properties, including shade, strength, and dispersibility, meeting the high standards required for industrial applications. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance tests is available for every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. This product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Red Powder
Identification (IR)	Conforms
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Resistance to Light	≥ 6 (Blue Scale)
Resistance to Solvents	≥ 4-5
Moisture Content	≤ 2.0%
Ash Content	Contact for details
Particle Size (D50)	Contact for details

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