Description

Reactive Brown 16 CAS NO 12239-65-5 is a high-performance, bifunctional reactive dye belonging to the azo chemical class, specifically engineered for covalent bonding with cellulosic fibers. This compound matters for its excellent wash and light fastness properties, providing durable and vibrant brown colorations in demanding textile applications. It is primarily needed by manufacturers in the textile dyeing and printing industries for coloring cotton, viscose, and other natural fibers, as well as for research and development in specialty colorant formulations.

Application

• Exhaust dyeing of cotton and viscose yarns and fabrics.
• Continuous pad-batch and pad-steam dyeing processes for cellulosic textiles.
• Textile printing applications for achieving consistent brown shades.
• Dyeing of hemp, linen, and other natural cellulosic materials.
• Used in combination with other reactive dyes to create a wide range of compound shades.
• Research and development of new dye formulations and specialty colorants.

Basic Information

Product Name	Reactive Brown 16
CAS No.	12239-65-5
Molecular Formula	C31H19ClN7Na4O19S6
Molecular Weight	1131.37 g/mol
Synonyms	Reactive Brown 16; C.I. Reactive Brown 16; Reactive Brown K-4R; Reactive Brown M-4R; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[[3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-4-sulfophenyl]amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[2-methoxy-5-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, tetrasodium salt; Tetrasodium 5-[(4-chloro-6-{[3-({4-[2-(sulfooxy)ethylsulfonyl]phenyl}azo)-4-sulfonatophenyl]amino}-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-[(2-methoxy-5-{2-[(sulfooxy)ethyl]sulfonyl}phenyl)azo]naphthalene-2,7-disulfonate
EINECS	Contact for details

Quality Control

Our Reactive Brown 16 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot undergoes comprehensive testing, including strength (tinctorial value), shade, fixation rate, and impurity profile analysis. Certificates of Analysis (COA) detailing all specifications are available upon request to support your quality assurance protocols.

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 and moisture to maintain product stability and performance.

Specification

Item	Specification
Appearance	Brown powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 80% (as commercial grade)
Strength	100 ± 3% (vs. standard)
Shade	Conforms to standard
Moisture Content	≤ 7.0%
Water Insoluble Matter	≤ 1.0%
Fixation Rate	≥ 70% (on cotton)
pH (1% Solution)	5.5 - 7.5

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