Description

Solvent Yellow 33 is a high-purity, light-stable organic dye belonging to the diarylmethane class, widely recognized for its strong, greenish-yellow hue. Its primary value lies in providing consistent, vibrant coloration with excellent solubility in a range of non-polar organic solvents, making it a critical component for industrial tinting and identification. This product is essential for manufacturers in the plastics, fuel, and specialty chemical sectors who require reliable and standardized colorants for their formulations. We supply Solvent Yellow 33 CAS NO 8003-22-3 to meet the stringent quality demands of global industrial applications.

Application

• Plastics and Polymer Coloring: Used as a masterbatch or direct additive to color polystyrene, ABS, polycarbonate, and other engineering plastics.
• Fuel and Oil Dyeing: Employed as a marker or identifier in gasoline, diesel, lubricating oils, and hydraulic fluids.
• Wax and Candle Manufacturing: Provides stable coloration for paraffin waxes and other candle-making materials.
• Ink and Toner Formulation: A key pigment for specialty printing inks, including solvent-based inks and toners for non-impact printing.
• Wood Stains and Coatings: Imparts transparent yellow shades to wood stains, lacquers, and other protective coatings.
• Detergent and Soap Coloring: Used to color industrial cleaning products and soaps where solvent compatibility is required.

Basic Information

Product Name	Solvent Yellow 33
CAS No.	8003-22-3
Molecular Formula	C17H14N2O
Molecular Weight	262.31 g/mol
Synonyms	Sudan Yellow R; C.I. Solvent Yellow 33; C.I. 47000; 4-(Phenylazo)-N,N-diphenylaniline; 1-(Phenylazo)-4-(diphenylamino)benzene; Oil Yellow R; Waxoline Yellow R; Aizen SOT Yellow 3
EINECS	232-318-2

Quality Control

Our production of Solvent Yellow 33 adheres to strict quality management protocols to ensure batch-to-batch consistency and purity. Every lot is tested against comprehensive specifications, including identity confirmation, purity assay, and impurity profiling. Certificates of Analysis (COA) detailing all test results are provided with each shipment to support your quality assurance and regulatory compliance needs.

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. Under these conditions, the product maintains its stability and color strength.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder or crystals
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Melting Point	128°C - 132°C
Loss on Drying	≤ 0.5%
Solubility (in Toluene)	Complete, clear solution
Heavy Metals (as Pb)	≤ 20 ppm

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