Description

Acid Yellow 44 is a synthetic organic dye belonging to the azo dye class, widely recognized for its bright, vivid yellow color. It is valued for its strong tinctorial strength and good solubility in aqueous systems, making it a reliable and efficient coloring agent. This dye is primarily used in the textile industry for dyeing and printing natural and synthetic fibers, as well as in the coloration of paper, leather, and specialty inks. Its consistent quality and performance make it a key component for manufacturers requiring stable and vibrant yellow hues in their products.

Application

• Textile Dyeing and Printing: Primary application for coloring wool, silk, nylon, and other polyamide fibers.
• Leather Finishing: Used to impart a uniform and durable yellow color to various types of leather goods.
• Paper Coloring: Employed in the production of colored papers, including specialty packaging and decorative papers.
• Ink Formulation: A key pigment for manufacturing writing inks, stamp pad inks, and other liquid ink systems.
• Biological Staining: Used in histology and microscopy as a staining agent for tissue samples.
• Industrial Coatings: Incorporated into coatings and paints where a specific yellow shade is required.

Basic Information

Product Name	Acid Yellow 44
CAS No.	2429-76-7
Molecular Formula	C16H13N4NaO4S
Molecular Weight	380.35 g/mol
Synonyms	Acid Yellow A; C.I. 23900; Acid Leather Yellow A; Acid Yellow 2G; Acid Fast Yellow A; Wool Yellow A; Lissamine Yellow A; Acid Yellow 2GX; 7-Hydroxy-8-[(E)-(4-sulfonatophenyl)diazenyl]naphthalene-1,3-disulfonic acid trisodium salt
EINECS	219-379-9

Quality Control

Our Acid Yellow 44 is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot is tested against stringent in-house specifications, which typically include parameters for color strength, shade, solubility, and impurity profiles. A Certificate of Analysis (COA) detailing the results of these quality tests is provided with every shipment to guarantee 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 room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed 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%
Water Solubility	Clear solution at 1%
Ash Content	Max. 30.0%
Heavy Metals (as Pb)	Max. 20 ppm

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