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Pigment Red 21

Brand	Fineland Chem
Color Index	Pigment Red 21
Color Index No	12300
CAS No	3789-75-1
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 known for its bright yellowish-red shade and strong tinting strength. It has the chemical formula C₂₃H₁₆ClN₃O₂ and is commonly used in applications such as industrial coatings, printing inks (including water-based and offset inks), and textile printing. This pigment offers good dispersibility, high opacity, and stable performance in various formulations. While it provides moderate lightfastness (typically rated around 6) and heat resistance up to 140 °C, it remains a popular choice for indoor and general-purpose color applications due to its vivid hue and cost-effectiveness.

Best Selling

PR21 – DuraPaint® 6521-1 ⬇️TDS
A high-performance red pigment designed for coatings, offering brilliant shade, excellent durability, and strong color consistency.

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 drum, 1000KG Carton Box.

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

Pigment Red 21 Advantages

Advantages

How to handle the packaging and transportation of pigment Red 21 products?
FineLand Chem uses professional packaging materials and technologies to ensure the safety and integrity of the products during transportation. As a pigment Red 2 supplier, we will choose the appropriate transportation and packaging methods to minimize the risks during transportation.

Does your company have any certifications and qualifications related to pigment Red 21?
Yes, FineLand Chem has ISO 9001 quality management system certification and other industry-related certifications such as ISO 14001 environmental management system certification. We are committed to achieving the highest standards in quality, environment and safety.

How long is your service response time?
FineLand Chem focuses on customer service. Usually, after receiving customer inquiries or orders, we will respond as soon as possible and provide detailed solutions. We are committed to meeting customer needs in a timely manner.