Description

Basic Yellow 49 is a synthetic cationic dye belonging to the methine class, widely recognized for its vibrant yellow hue and strong affinity for various substrates. This high-purity colorant is essential for achieving consistent, durable coloration in demanding industrial applications where performance and reliability are critical. It serves as a key component for manufacturers in the textile, paper, and specialty ink industries seeking superior color fastness and batch-to-batch consistency. Our supply of Basic Yellow 49 CAS NO 55777-80-5 is backed by stringent quality control to meet the exacting standards of global B2B buyers.

Application

• Textile Dyeing: Primarily used for dyeing acrylic fibers, modacrylic, and certain polyesters, offering excellent color yield and wash fastness.
• Paper Coloring: Imparts a bright, uniform yellow color to specialty papers, including decorative and security papers.
• Ink Manufacturing: A vital pigment for creating yellow shades in flexographic, gravure, and specialty printing inks.
• Leather Finishing: Used in the dyeing of leather goods to achieve vibrant and lasting yellow finishes.
• Biological Staining: Employed in histology and microbiology as a staining agent for microscopic analysis.
• Plastics and Polymers: Suitable for mass coloration of certain plastics where a stable yellow color is required.

Basic Information

Product Name	Basic Yellow 49
CAS No.	55777-80-5
Molecular Formula	C21H29N3O3S
Molecular Weight	403.54 g/mol
Synonyms	Basic Yellow 49; C.I. 49005; Aizen Cathilon Yellow 5GLH; Astrazon Yellow 5GL; Maxilon Yellow 5GL; Sevron Yellow 5GL; Sumiacryl Yellow N-5GL; Yatromin Yellow 5G; 2-[[4-[Ethyl(3-sulfobenzyl)amino]phenyl]azo]-6-methoxy-3-methylbenzothiazolium hydroxide inner salt
EINECS	Contact for details

Quality Control

Every batch of Basic Yellow 49 is manufactured and tested under a strict quality management system. We ensure the product meets high-purity specifications through comprehensive analytical testing, including HPLC for assay and identification. A Certificate of Analysis (COA) detailing purity, strength, and impurity profiles is provided with each shipment, guaranteeing traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 5%
Moisture Content	Max. 5.0%
Ash Content	Max. 1.0%
Water Solubility	Freely soluble

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