I. Product Name

Product Name: Pigment Red 21, Lightfast Scarlet 2R, Scarlet Powder

International Index Number: C.I Pigment Red 21

CAS Registry Number: 6410-26-0

EC Number: 229-096-4

Product Series: Monoazo

Pigment

II. Physicochemical and Fastness Properties

Molecular Weight: 367.40

Molecular Formula: C23H17C1N3O2

pH Value: 6.0-7.0

Specific Gravity: 1.5

Oil Absorption (ml/100g): 35-45

Lightfastness: 6

Heat Resistance: 160°C

Water Resistance: 4

Oil Resistance: 4

Acid Resistance: 4

Alkali Resistance: 4

III. Application Fields

Color: Yellowish Red

Mainly Used In: Paints, also applicable in inks.

Scarlet Powder, as a yellowish red pigment, features high tinting strength, excellent dispersibility, and low cost. It is a commonly used red pigment with broad applications.

In recent years, with the gradual maturation of water-based paint applications domestically, pigments for water-based paints have drawn increasing attention from manufacturers. The focus is on maintaining good dispersion, coverage, and tinting properties in water-based systems.

To meet the demands of the water-based paint market, significant R&D investment has been made to modify the pigment surface of Scarlet Powder with hydrophilic additives. This ensures excellent stability and dispersibility in water-based systems, preventing floating or flooding whether applied by rolling or spraying. It also meets the temperature resistance requirements of low-temperature baking water-based paints, remaining stable without discoloration when baked at around 140°C. Additionally, Scarlet Powder has small particle size, uniform fineness, and provides excellent covering power and tinting strength.