Description

Solvent Red 31 is a high-purity, synthetic organic colorant belonging to the solvent dye class, identified by CAS No. 6226-90-0. This product is valued for its excellent solubility in non-polar to medium-polarity organic solvents, providing strong, vibrant coloration. It is primarily utilized by manufacturers in the plastics, inks, coatings, and specialty chemical industries where consistent color strength and stability are critical for product quality.

Application

• Plastics Coloring: Used for mass coloration of polystyrene (PS), polycarbonate (PC), and other engineering plastics.
• Ink Formulation: A key component in solvent-based printing inks for packaging and industrial marking.
• Coatings and Paints: Imparts color to industrial coatings, wood stains, and automotive refinish products.
• Wax and Grease: Employed to color candles, wax polishes, and lubricating greases.
• Specialty Fluids: Used as a color marker or tracer in fuels, hydraulic fluids, and other non-aqueous systems.
• Consumer Goods: Suitable for coloring certain types of consumer plastics and synthetic fibers.

Basic Information

Product Name	Solvent Red 31
CAS No.	6226-90-0
Molecular Formula	C24H20N4O
Molecular Weight	380.44 g/mol
Synonyms	1-[[4-(Phenylazo)phenyl]azo]-2-naphthol; C.I. Solvent Red 31; Ceres Red BB; Oil Red BB; Aizen SOT Red 1; Sudan Red BB; Red BB; 1-[(E)-[4-[(E)-Phenyldiazenyl]phenyl]diazenyl]naphthalen-2-ol
EINECS	228-314-4

Quality Control

Our Solvent Red 31 is manufactured under a strict quality management system. Every batch is tested to ensure it meets precise specifications for color strength, hue, solubility, and purity. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with each shipment to guarantee consistent performance and supply reliability for your formulations.

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 heat and incompatible materials.

Specification

Item	Specification
Appearance	Red to dark red powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Color Strength	100 ± 3%
Solubility (in Toluene)	Clear, complete solution
Moisture (KF)	≤ 0.5%
Ash Content	≤ 0.5%

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