Pigment Red 21

Brand	Fineland Chem
Color Index	Pigment Red 21
Color Index No	12300
CAS No	6410-26-0
EC No	229-096-4
Chemical Group	Mono Azo
Chemical Formula	C₂₃H₁₆ClN₃O₂

Introduction

Pigment Red 21 (C.I. 12300; CAS 6410-26-0) is a monoazo organic pigment with the chemical formula C₂₃H₁₆ClN₃O₂. It is currently mass-produced in China, under commercial names including “Dahongfen” (Bright Red Powder) and “Tongyi Jinguanghong” (Unified Golden Bright Red). This product features a vivid yellowish-red shade and strong tinting strength, capable of meeting basic coloring needs.Pigment Red 21 has good dispersibility and high opacity, with stable performance in various formulation systems. It has moderate lightfastness (typically rated around Grade 6) and a maximum heat resistance of up to 140°C. it remains a preferred product for indoor and general coloring needs due to its significant cost advantages and bright hue.Pigment Red 21 is widely used in the industrial coatings field, applicable to products such as red enamel paint and latex paint; It is also suitable for the printing and pigment field, covering printing inks (including water-based and offset inks), watercolor and oil paints, as well as the coloring of stationery; in addition, it can be used in the textile printing and dyeing process in the textile field.

Physical Properties

Test Item	Specification
Density (g/cm3 )	1.74
Specific Surface Area(m²/g)	22-25
Oil Absorption(g/100g)	45-69
PH Value	6.5-7.5
Moisture Content (%)	≤2.5
Total impurities(ppm)	≤600

Fastness Properties (5=excellent, 1=poor) | Light Fastness (8=excellent, 1=poor)

Heat Resistance (℃)	160	Alkali Resistance (1-5)	4
Light Resistance (Full Shade, 1-8)	5-6	Migration Resistance(1-5)	4
Light (Reduced tinting, 1-8)	5	Ethyl Acetate (1-5)	4
Weather Resistance (1-5)	5	Ethanol (1-5)	4
Acid Resistance (1-5)	4	MEK (1-5)	4

Pigment Red 21 Application

Pigment red 21 application:
Mainly recommend for paint and fabric/textile printing paste.

Application

Printing Ink: Discover high-performance ink pigments for various printing technologies including water-based, solvent-based, offset, inkjet, UV curing, and decorative applications. More Details

Paint and Coating: Explore a wide range of coating pigments tailored for paints, oils, automotive finishes, industrial applications, concrete, cement, and ceramics. More Details

Plastic: Browse a comprehensive selection of plastic pigments designed for PE, PVC, EVA, rubber, and a variety of engineering plastics. More Details

Special Applications: Find specialized pigments offering unique effects and functionalities for textiles, resins, glazes, metallic finishes, fluorescence, and anti-corrosion needs. More Details

Package and Delivery

● 25KG Kraft Bag, 400kg/500kg Carton Box

● Lead Time: Normally around 15 days after signed contract.

Pigment Red 21 Advantages

Advantages

Product Characteristics & Hue Performance

As a monoazo organic pigment, it has clear key identifiers (C.I. 12300; CAS 6410-26-0, chemical formula C₂₃H₁₆ClN₃O₂), featuring a vivid yellowish-red shade and strong tinting strength to provide bright visual effects. It is currently mass-produced in China, with commercial names including “Dahongfen” (Bright Red Powder) and “Tongyi Jinguanghong” (Unified Golden Bright Red), ensuring stable supply.

Performance Stability

It has good dispersibility and high opacity, showing stable performance in various formulation systems. With moderate lightfastness (typically rated around Grade 6) and heat resistance up to 140°C, it can meet the usage needs of most indoor and general-purpose scenarios, with strong adaptability.

Cost & Applicability Advantages

It has a significant cost advantage. It becomes a preferred choice in indoor coloring, basic industry and cultural & educational fields due to its high cost-effectiveness and bright hue, with wide applicability and prominent economy.

Wide Application Range

It covers the usage needs of multiple fields, including industrial coatings (red enamel paint, latex paint), printing & pigments (water-based/offset inks, watercolor/oil paints, stationery) and textile printing & dyeing. It has flexible scenario adaptation and does not require additional adaptation to a variety of special processes.