Description

C.I. Basic Orange 35 is a synthetic cationic dye belonging to the azo class, widely recognized for its vibrant and durable orange hue. Its primary value lies in its strong affinity for polyacrylonitrile fibers, providing excellent colorfastness properties essential for high-quality textile products. This dye is a critical component for manufacturers in the textile, paper, and leather industries seeking reliable and consistent coloration for synthetic materials.

Application

• Textile Dyeing: Primary application for dyeing acrylic fibers, modacrylic, and certain polyamide fibers to achieve bright orange shades with good wash and light fastness.
• Paper Coloring: Used in the production of specialty papers, including decorative and packaging papers, where a strong, non-bleeding color is required.
• Leather Finishing: Employed in the dyeing of leather goods to provide uniform and vibrant orange coloration.
• Ink Manufacturing: Serves as a colorant for inks used in stamp pads, flexographic, and other specialty printing applications.
• Biological Staining: Utilized in histology and microbiology as a stain for tissue sections and microorganisms in laboratory settings.
• Plastics and Polymers: Can be incorporated for mass coloration of certain plastics where compatibility allows.

Basic Information

Product Name	C.I. Basic Orange 35
CAS No.	12221-49-7
Molecular Formula	C20H21N6O3S2·ZnCl2
Molecular Weight	Approx. 625.9 g/mol (for zinc chloride double salt)
Synonyms	Basic Orange 35; Aizen Cathilon Orange GLH; Astrazon Orange G; Maxilon Orange GRL; C.I. 48035; 1,3-Benzenedisulfonic acid, 4-[[4-(dimethylamino)phenyl]azo]-7-(phenylamino)-, zinc salt (2:1); Cationic Orange G
EINECS	235-411-5

Quality Control

Our C.I. Basic Orange 35 is manufactured under a stringent quality management system. Each batch is tested to ensure it meets precise specifications for color strength, shade, solubility, and impurity profiles. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters to guarantee batch-to-batch consistency and performance in your application.

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. The product is hygroscopic (moisture-sensitive); ensure the container is resealed tightly after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
pH (1% Solution)	3.0 - 6.0
Heavy Metals (as Pb)	≤ 20 ppm

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