Description

C.I. Basic Red 35 is a synthetic cationic dye belonging to the azo class, valued for its vibrant red hue and strong affinity for polyacrylonitrile and other modified synthetic fibers. Its primary commercial value lies in providing excellent color fastness, brightness, and leveling properties in demanding industrial dyeing processes. This product is essential for manufacturers in the textile, paper, and specialty ink industries seeking consistent, high-performance coloration.

Application

• Primary dyeing of acrylic fibers (Orlon, Acrilan) and modacrylics.
• Coloration of paper products, including specialty and decorative papers.
• Manufacturing of inks for ballpoint pens, stamp pads, and other writing instruments.
• Dyeing of cationic-dyeable polyester (CDP) and nylon.
• Biological staining applications in laboratory and diagnostic settings.
• Production of colored plastics and masterbatches.

Basic Information

Product Name	C.I. Basic Red 35
CAS No.	12221-59-9
Molecular Formula	C21H22ClN7
Molecular Weight	407.90 g/mol
Synonyms	Basic Red 35; Aizen Cathilon Red GTLH; Astrazon Red GTL; Maxilon Red GTL; Cationic Red GTL; 1,3-Benzenediamine, 4-[[4-[(dimethylamino)phenyl]azo]-N,N-dimethyl-; 4-[[4-(Dimethylamino)phenyl]azo]-N,N-dimethyl-1,3-benzenediamine monohydrochloride
EINECS	235-402-8

Quality Control

Our production of C.I. Basic Red 35 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and conformance to specification is provided with each shipment.

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 strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark red powder or granules
Identification (IR)	Conforms to standard
Color Strength	100% ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Solubility	Clear solution at specified concentration
Ash Content	≤ 1.0%
Particle Size	As per customer requirement

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