Description

C.I.Reactive Orange 71 is a high-performance, water-soluble reactive dye belonging to the azo chemical class. It is engineered to deliver excellent color yield and superior fastness properties on cellulosic fibers like cotton and viscose. This product is essential for textile manufacturers and dye houses seeking vibrant, durable orange shades with reliable batch-to-batch consistency. Its application ensures high fixation rates and good wash-off properties, making it a cost-effective choice for industrial dyeing processes.

Application

• Exhaust Dyeing of Cotton: Primary application for dyeing cotton yarns and fabrics in jet, overflow, and winch dyeing machines.
• Continuous Dyeing: Suitable for pad-batch and pad-steam continuous dyeing processes for cellulosic textiles.
• Viscose and Rayon Dyeing: Used to achieve bright and fast orange colors on regenerated cellulose fibers.
• Blend Dyeing: Can be applied in the dyeing of cotton/polyester blends using appropriate dyeing methods.
• Garment Dyeing: Effective for producing fashionable, piece-dyed orange apparel with good levelness.
• Home Textiles: Used for dyeing bed linens, towels, and other home furnishing fabrics requiring colorfastness.

Basic Information

Product Name	C.I. Reactive Orange 71
CAS No.	61969-19-5
Molecular Formula	C31H19ClN7Na4O19S6
Molecular Weight	1181.36 g/mol
Synonyms	Reactive Orange 71; Reactive Brilliant Orange 3R; C.I. 179145; Reactive Orange H-3R; Triazinyl reactive orange dye; Sodium 4-[[4-chloro-6-[[4-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]amino]-1,3,5-triazin-2-yl]amino]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate; Novacron Orange H-3R (Huntsman); Remazol Brilliant Orange 3R (Dystar)
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Orange 71 adheres to stringent quality control protocols to ensure it meets the high standards required for industrial textile applications. Every batch is tested for critical parameters including shade, strength, solubility, and fixation rate. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with each shipment to guarantee traceability and consistency.

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 sealed after use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Orange to Reddish-Orange Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	5.5 - 7.5
Fixation Rate	≥ 70%
Dusting Grade	Low Dusting

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