Description

Solvent Yellow 56 is a synthetic organic dye belonging to the azo class, widely recognized for its bright, stable yellow coloration. This high-performance colorant is valued for its excellent solubility in non-polar to moderately polar organic solvents, providing consistent and reliable tinting strength. It is primarily utilized in industrial applications where durable, non-aqueous coloration is required, serving sectors such as plastics, printing inks, and specialty coatings.

Application

• Primary colorant for plastics and polymer resins, including polystyrene, ABS, and polycarbonate.
• Manufacturing of printing inks, particularly for flexographic and gravure processes on non-porous substrates.
• Coloration of industrial coatings, lacquers, and wood stains requiring solvent-based systems.
• Tinting agent for specialty chemicals and waxes.
• Marker and tracer dye in petroleum products and fuels (subject to regional regulations).
• Coloring for adhesives and sealants.

Basic Information

Product Name	Solvent Yellow 56
CAS No.	2481-94-9
Molecular Formula	C16H18N4O
Molecular Weight	282.34 g/mol
Synonyms	1-(Phenylazo)-2-naphthylamine; C.I. Solvent Yellow 56; Oil Yellow 56; Azoic Yellow 56; 1-(Phenylazo)-2-naphthalenamine; 2-Naphthylamine, 1-(phenylazo)-; 1-Anilinoazo-2-naphthalene; 1-Phenylazo-2-naphthylamine
EINECS	219-630-8

Quality Control

Our Solvent Yellow 56 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against comprehensive specifications for color strength, hue, solubility, and purity. A Certificate of Analysis (COA) detailing the results for key parameters is provided with every shipment 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 a controlled room temperature (15-25°C). Keep away from heat sources and incompatible materials. This product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellow to orange powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Color Strength	100 ± 5% (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.