Description

C.I. Reactive Orange 35 is a high-performance, water-soluble reactive dye belonging to the azo chemical class. This product is engineered to deliver vibrant and durable orange shades with excellent wash and light fastness on cellulosic fibers like cotton and viscose. It is a critical component for textile manufacturers and dye houses seeking reliable, high-quality coloration for apparel, home textiles, and industrial fabrics. The compound is identified by CAS No. 12270-76-7.

Application

C.I. Reactive Orange 35 is primarily used in textile dyeing and printing processes. Its key applications include:

• Exhaust Dyeing of Cotton: For batch-wise dyeing of yarns, knits, and woven fabrics.
• Continuous Dyeing: Used in pad-batch and pad-steam processes for efficient, large-scale fabric production.
• Textile Printing: Formulated into printing pastes for creating sharp, defined orange patterns on cellulose-based materials.
• Viscose and Linen Dyeing: Provides good affinity and color yield on other cellulosic substrates.
• Blend Dyeing: Can be used in processes for cotton-polyester blends under specific conditions.

Basic Information

Product Name	C.I. Reactive Orange 35
CAS No.	12270-76-7
Molecular Formula	C26H18ClN7Na4O16S4
Molecular Weight	946.13 g/mol
Synonyms	Reactive Orange 35; Reactive Orange H-ER; Reactive Orange HE2R; C.I. 18260; Remazol Orange 3R; Levafix Orange E-3GA; Drimarene Orange K-3R; Procion Orange H-ER; Vinylsulfone Reactive Dye Orange 35; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(2-sulfo-4-[(2-sulfooxyethyl)sulfonyl]phenyl)azo]-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Orange 35 adheres to stringent quality management protocols. Every batch is tested against rigorous internal specifications to ensure consistent shade, strength, solubility, and fixation properties. Certificates of Analysis (COA) detailing purity, dye content, and key physical parameters are provided with each shipment to guarantee product integrity and performance for your manufacturing process.

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 original packaging is resealed tightly after use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to standard
Dye Content	≥ 90%
Shade	Conforms to standard
Solubility in Water	≥ 100 g/L (at 50°C)
pH (1% Solution)	6.0 - 8.0
Moisture Content	≤ 5.0%
Fixation Rate	≥ 70% (on cotton)

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