Description

C.I. Solvent Brown 42 is a high-performance, oil-soluble diazo solvent dye widely used for its excellent tinting strength and stability in non-polar systems. This product matters for industrial formulators who require consistent, vibrant coloration in applications where water-based dyes are unsuitable. Key industries that need this dye include plastics, printing inks, wood stains, and coatings, where it provides durable and lightfast brown shades.

Application

• Coloration of thermoplastics and thermosetting resins, including polystyrene, ABS, and polycarbonate.
• Manufacturing of printing inks, particularly for flexographic and gravure printing on plastic films and foils.
• Formulation of wood stains and wood finishes to enhance grain appearance and provide uniform coloring.
• Pigmentation of industrial coatings, lacquers, and varnishes for metal and plastic substrates.
• Coloring of waxes, polishes, and candles.
• Tinting of fuels and lubricants for identification purposes.
• Coloration of specialty adhesives and sealants.

Basic Information

Product Name	C.I. Solvent Brown 42
CAS No.	61725-75-5
Molecular Formula	C24H20N4O2
Molecular Weight	396.44 g/mol
Synonyms	Solvent Brown 42; C.I. 10410; Oil Brown 402; Aizen SOT Brown-1; Ceres Brown R; Fat Brown RR; Sudan Brown 460; Spirit Brown 3B; 1-[(2-Methoxyphenyl)azo]-2-naphthol (component); 1-[(4-Methoxyphenyl)azo]-2-naphthol (component)
EINECS	262-966-8

Quality Control

Our C.I. Solvent Brown 42 is manufactured under a strict quality management system. Every batch undergoes comprehensive testing for critical parameters including color strength, solubility, and thermal stability to ensure batch-to-batch consistency and performance in your application. Certificates of Analysis (COA) detailing purity, shade, and physical properties are available upon request.

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 has excellent shelf stability.

Specification

Item	Specification
Appearance	Brown powder or granules
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Purity (HPLC)	≥ 96.0%
Moisture Content	≤ 1.0%
Ash Content	≤ 0.5%
Solubility (in Toluene)	Complete, clear solution
Lightfastness (Standard Scale)	5-6
Heat Stability (°C)	≥ 200

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