Description

C.I. Reactive Blue 120 is a high-performance, bifunctional reactive dye belonging to the vinyl sulfone and chlorotriazine class, offering excellent wash and light fastness properties. Its primary value lies in providing brilliant and durable blue shades with high fixation rates and good reproducibility on cellulosic fibers. This dye is essential for textile manufacturers and dye houses specializing in the coloration of cotton, viscose, and other natural fibers via exhaust, pad-batch, or continuous dyeing processes.

Application

• Exhaust dyeing of cotton and regenerated cellulose fibers (e.g., viscose, lyocell) in garment, yarn, and fabric form.
• Pad-batch and continuous dyeing processes for woven and knitted cotton fabrics.
• Production of deep and brilliant blue shades with high wet fastness for home textiles like bed linens and towels.
• Dyeing of cellulosic blends with polyester or nylon, where compatibility with other dye classes is required.
• Used in the formulation of liquid and powder dye preparations for automated dosing systems in modern dye houses.
• Application in the textile printing industry for creating sharp, wash-fast blue prints.

Basic Information

Product Name	C.I. Reactive Blue 120
CAS No.	61931-47-3
Molecular Formula	C29H19ClN7Na3O11S3
Molecular Weight	882.08 g/mol
Synonyms	Reactive Blue 120; Reactive Blue H-ER; Remazol Brilliant Blue BB; Levafix Blue CA; Drimarene Blue K-2B; C.I. 612120; Vinylsulfone reactive dye; Bifunctional reactive dye (VS/CT); Sodium 4-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-5-hydroxy-3-[[4-[(2-sulfoxyethyl)sulfonyl]phenyl]azo]-6-(2,4,6-trimethylphenyl)azo]naphthalene-2,7-disulfonate
EINECS	263-310-8

Quality Control

Every batch of C.I. Reactive Blue 120 is manufactured and tested to meet stringent industry specifications for reactive dyes. Our quality assurance protocol includes verification of key parameters such as shade, strength, solubility, and fixation rate to ensure batch-to-batch consistency and optimal performance in your application. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance tests 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 ambient temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the original container must be kept tightly sealed after use to prevent caking or degradation due to atmospheric moisture.

Specification

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

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