Description

Solvent Yellow 21 is a high-purity, light-stable organic dye belonging to the diarylmethane class, widely recognized for its strong, clean yellow coloration. This product is essential for providing consistent, vibrant tinting and identification in a variety of non-polar industrial systems. It is primarily utilized by manufacturers in the plastics, wax, and hydrocarbon-based solvent industries seeking reliable and cost-effective colorants. Its compatibility with organic matrices makes it a preferred choice for technical applications where color uniformity is critical.

Application

• Coloration of hydrocarbon-based solvents, fuels, and lubricants for identification and branding purposes.
• Tinting of polystyrene, acrylic, and other thermoplastic resins during manufacturing.
• Coloring of paraffin waxes, candles, and polishes to achieve consistent yellow hues.
• Use as a colorant in printing inks, especially for specialty and industrial applications.
• Staining and identification of non-polar materials in laboratory and quality control settings.
• Potential use in the coloration of certain adhesives and sealants.

Basic Information

Item	Detail
Product Name	Solvent Yellow 21
CAS No.	5601-29-6
Molecular Formula	C17H14N2O
Molecular Weight	262.31 g/mol
Synonyms	1,3-Dioxolane, 2-(2-quinolyl)-4,5-dihydro-; C.I. Solvent Yellow 21; Quinoline Yellow SS; 2-(2-Quinolyl)-1,3-dioxolane; 2-(2-Quinolinyl)-1,3-dioxolane; Waxoline Yellow Y; Oil Yellow 2G; Sudan Yellow 146
EINECS	227-011-6

Quality Control

Our production of Solvent Yellow 21 adheres to stringent internal quality protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed for key parameters including color strength, hue, and solubility profile. A comprehensive Certificate of Analysis (COA) documenting purity, identity, and physical properties is provided with every shipment to support your quality assurance processes.

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 sources and incompatible materials.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder or crystalline solid
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 98.0%
Melting Point	Contact for details
Solubility (Toluene)	Complete, clear solution
Loss on Drying	Max. 0.5%
Ash Content	Max. 0.1%

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