Description

Solvent Yellow 21 is a synthetic organic dye belonging to the diarylmethane class, widely recognized for its bright, stable yellow color. This high-performance colorant is valued for its excellent solubility in non-polar organic solvents and its strong tinting strength, making it a critical component in industrial coloring applications. It is primarily utilized by manufacturers in the plastics, printing inks, and coatings industries who require consistent, vibrant coloration for their products.

Application

• Primary colorant for plastics and polymer resins, including polystyrene, ABS, and polycarbonate.
• Formulation of printing inks, particularly for flexographic and gravure printing on non-porous substrates.
• Manufacturing of industrial coatings and paints, providing durable coloration for metal and plastic surfaces.
• Coloring of waxes, greases, and lubricants for identification and branding purposes.
• Staining agent for wood finishes and transparent lacquers.
• Production of colored masterbatches and concentrates for the plastics compounding industry.

Basic Information

Product Name	Solvent Yellow 21
CAS No.	29991-00-2
Molecular Formula	C17H14N2O
Molecular Weight	262.31 g/mol
Synonyms	Sudan Yellow 146; C.I. 18600; Oil Yellow 21; 1-[(2-Methoxyphenyl)azo]-2-naphthalenol; 1-(2-Methoxyphenylazo)-2-naphthol; Ceres Yellow GN; Plast Yellow; Waxoline Yellow 2GP
EINECS	Contact for details

Quality Control

Every batch of Solvent Yellow 21 is manufactured and tested under a strict quality management system to ensure batch-to-batch consistency and performance. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) are available upon request, detailing key parameters such as color strength, purity, and solubility.

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, sparks, and open flame. Ensure the container is kept tightly sealed when not in use to prevent contamination and moisture absorption.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Color Strength	95 - 105% (vs. Standard)
Solubility (in Toluene)	Complete, clear solution
Moisture Content (KF)	≤ 1.0%
Ash Content	≤ 0.5%

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