Description

C.I.Disperse Red 185 is a high-performance, synthetic organic dye belonging to the disperse dye class, widely recognized for its vibrant red hue. It is valued for its excellent color fastness, thermal stability, and compatibility with synthetic fibers, making it a critical component for achieving consistent and durable coloration. This product is essential for manufacturers in the textile and polymer industries seeking reliable, high-quality dyes for demanding applications.

Application

• Primary dyeing and printing of hydrophobic synthetic fibers such as polyester (PET) and its blends.
• Coloration of acetate and triacetate fibers for apparel and home furnishings.
• Mass coloration (dope dyeing) of polyester chips and other polymers during the melt-spinning process.
• Used in the production of transfer papers for sublimation printing on textiles and hard substrates.
• Potential applications in the coloration of specific engineering plastics where high-temperature stability is required.
• Formulation of inkjet inks designed for textile and specialty printing.

Basic Information

Product Name	C.I. Disperse Red 185
CAS No.	61901-71-1
Molecular Formula	C₂₀H₁₃NO₄
Molecular Weight	331.32 g/mol
Synonyms	Disperse Red 185; Disperse Red SE-4B; C.I. 11125; 1,4-Diamino-2-methoxy-9,10-anthraquinone; 2-Methoxy-1,4-diaminoanthraquinone; 1,4-Diamino-2-methoxyanthraquinone; Anthraquinone Red 185; Foron Red SE-4B (Trade Name)
EINECS	263-280-7

Quality Control

Our C.I. Disperse Red 185 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Every lot is tested against rigorous internal specifications for color strength, shade, dispersion stability, and purity. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee compliance with your technical requirements.

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. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Reddish-brown powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Within agreed tolerance
Purity (HPLC)	≥ 98.0%
Moisture Content	≤ 1.0%
Ash Content	≤ 0.5%
Dispersion Stability	Passes test
Particle Size	≤ 2.0 μm (Average)

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