Description

C.I. Solvent Yellow 25 is a high-purity, oil-soluble dye belonging to the diarylmethane chemical class, widely recognized for its strong, bright yellow hue. This product is essential for providing consistent and durable coloration in non-aqueous systems where water solubility is not required. It is primarily sought after by manufacturers in the plastics, printing ink, and industrial coating sectors for its excellent solubility in organic solvents and polymers.

Application

• Coloration of plastics and synthetic fibers, including polystyrene, polycarbonate, and acrylics.
• Manufacturing of printing inks, particularly for flexographic and gravure applications.
• Pigmentation of industrial coatings, lacquers, and wood stains.
• Coloring waxes, greases, and polishes.
• Used in the production of colored ballpoint pen inks and other stationery items.
• As a colorant for specific solvent-based markers and specialty paints.

Basic Information

Product Name	C.I. Solvent Yellow 25
CAS No.	37219-73-1
Molecular Formula	C17H14N2O3
Molecular Weight	294.31 g/mol
Synonyms	Solvent Yellow 25; Oil Yellow 25; C.I. 11380; 4-(Phenylazo)-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one; 1-Phenyl-3-methyl-4-(phenylazo)-5-pyrazolone; Waxoline Yellow 3GP; Aizen SOT Yellow 3; Sudan Yellow 146
EINECS	253-416-7

Quality Control

Our production of C.I. Solvent Yellow 25 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against established internal specifications for critical parameters such as color strength, hue, and solubility. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with each shipment to support your quality assurance processes.

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 heat sources and incompatible materials.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder or crystalline solid
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Color Strength	100 ± 3% (vs. Standard)
Solubility (in Toluene)	Complete, clear solution
Moisture Content	≤ 0.5%
Ash Content	≤ 0.2%

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