Description

Solvent Yellow 21 is a synthetic organic dye belonging to the solvent dye class, identified by CAS NO 12235-24-4. This high-performance colorant is valued for its excellent solubility in non-polar to weakly polar organic media, providing strong, stable coloration. It is primarily utilized in industries requiring durable and vibrant tints for plastics, waxes, fuels, and specialty inks.

Application

• Coloration of hydrocarbon-based fuels, including gasoline and heating oils.
• Masterbatch and mass coloration of olefinic polymers like polypropylene (PP) and polyethylene (PE).
• Staining and tinting of industrial waxes, polishes, and lubricants.
• Manufacturing of specialty printing inks, particularly for non-porous substrates.
• Coloring of wood stains, varnishes, and other solvent-based coatings.
• As a colorant for synthetic fibers during the melt-spinning process.
• Marker dyes for industrial fluids and leak detection systems.

Basic Information

Product Name	Solvent Yellow 21
CAS No.	12235-24-4
Molecular Formula	C16H12N2O
Molecular Weight	248.28 g/mol
Synonyms	1,2-Benzenedicarboximide, N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3,4-dihydro-; C.I. Solvent Yellow 21; Ceres Yellow GN; Oil Yellow 2G; Waxoline Yellow 2GP; Neozapon Yellow 141; Aizen SOT Yellow 1; Macrolex Yellow 2G
EINECS	Contact for details

Quality Control

Our Solvent Yellow 21 is manufactured under a strict quality management system. Each batch is tested to ensure consistent color strength, purity, and performance properties critical for industrial applications. Certificates of Analysis (COA) documenting key parameters such as hue, strength, and solubility are available upon request to support your quality assurance protocols.

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 strong oxidizing agents.

Specification

Item	Specification
Appearance	Yellow to orange powder or granules
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Hue	Within agreed tolerance
Purity (HPLC)	≥ 98.0%
Moisture Content	≤ 1.0%
Ash Content	≤ 0.5%
Solubility (in Toluene)	Complete, clear solution

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