Description

Solvent Red 135 is a high-performance, oil-soluble azo dye known for its excellent color strength and stability in non-polar media. This compound is critical for providing vivid, durable red coloration in a variety of industrial applications where solubility in organic solvents is paramount. It is primarily utilized by manufacturers in the plastics, ink, and coatings industries seeking reliable and consistent pigmentation.

Application

• Plastics Coloring: Used for coloring hydrocarbon-based plastics like polystyrene, ABS, and polycarbonate, offering good heat stability during processing.
• Industrial Inks: A key colorant for solvent-based printing inks, including flexographic and gravure inks, providing excellent printability and color fastness.
• Coatings and Paints: Imparts a stable red hue to various solvent-borne industrial coatings, lacquers, and wood stains.
• Waxes and Polishes: Employed in the coloration of candles, shoe polishes, and other wax-based products.
• Oil-Based Markers: Serves as a pigment for permanent markers and other writing instruments that utilize organic solvent systems.
• Specialty Fluids: Can be used for coloring lubricants, greases, and other functional fluids for identification purposes.

Basic Information

Product Name	Solvent Red 135
CAS No.	20749-68-2
Molecular Formula	C24H20N4O
Molecular Weight	380.44 g/mol
Synonyms	1-[[4-(Phenylazo)phenyl]azo]-2-naphthalenol; C.I. Solvent Red 135; Oil Red 135; Azoic Red 135; Ceres Red 135; Sudan Red 135; Red 135; 1-[(E)-[4-[(E)-Phenyldiazenyl]phenyl]diazenyl]naphthalen-2-ol
EINECS	244-045-6

Quality Control

Our Solvent Red 135 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against rigorous in-house specifications for color value, purity, and solubility. A comprehensive Certificate of Analysis (COA) detailing assay, identification, and impurity profiles 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, and well-ventilated area at room temperature (15-25°C). Keep away from heat sources and incompatible materials.

Specification

Item	Specification
Appearance	Dark red powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Color Strength	95 - 105% of standard
Solubility (in Toluene)	Complete, clear solution
Moisture (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.