Description

Pigment Red 31 is a high-performance, synthetic organic pigment belonging to the azo chemical class. This pigment is valued for its strong, vivid red hue and excellent color fastness properties, making it a critical component for achieving durable and consistent coloration. It is primarily utilized by manufacturers in the plastics, coatings, and printing ink industries seeking reliable and cost-effective red pigments.

Application

• Plastics Coloring: Widely used for the mass coloration of polyolefins (PP, PE), PVC, and engineering plastics, offering good heat stability and dispersion.
• Industrial Coatings: Imparts durable red color to industrial paints, automotive refinishes, and coil coatings, providing good weather resistance.
• Printing Inks: A key pigment for offset, gravure, and flexographic printing inks, delivering high color strength and print quality.
• Masterbatch Production: Used as a colorant in the manufacture of pigment concentrates for simplified downstream processing.
• Textile Printing: Employed in pigment printing systems for fabrics, offering bright shades and good wash fastness.
• Specialty Applications: Suitable for coloring synthetic fibers, leather finishes, and stationery products.

Basic Information

Product Name	Pigment Red 31
CAS No.	6448-96-0
Molecular Formula	C₃₄H₂₈Cl₂N₆O₆
Molecular Weight	679.53 g/mol
Synonyms	C.I. Pigment Red 31; C.I. 12360; Permanent Red FRR; Pigment Scarlet; 3,3'-[(3,3'-Dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[4-hydroxy-2-naphthalenecarboxamide]; Naphthol Red FRR; Azo Red FRR; Benzidine Red FRR
EINECS	229-247-6

Quality Control

Our production of Pigment Red 31 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, hue, particle size distribution, and rheological behavior in standard media. Certificates of Analysis (COA) documenting these results are provided to guarantee the product meets your technical specifications and application requirements.

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. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain color integrity.

Specification

Item	Specification
Appearance	Red Powder
Color Strength	100 ± 5% (vs. Standard)
Hue	Conforms to Standard
Particle Size (D50)	< 1.0 µm
Volatile Matter (105°C)	< 2.0 %
pH Value (10% Aqueous Slurry)	6.0 - 8.0
Oil Absorption	40 - 60 g/100g
Heat Stability (Plastic)	> 260°C
Lightfastness (Standard Scale)	6-7
Weatherfastness	Good

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