Description

C.I. Acid Yellow 223 is a synthetic organic dye belonging to the acid dye class, identified by CAS NO 71872-30-5. It is valued for its bright, stable yellow hue and strong affinity for protein-based and polyamide fibers. This high-performance colorant is essential for manufacturers in the textile, leather, and paper industries seeking vibrant and wash-fast coloration.

Application

The primary use of C.I. Acid Yellow 223 is as a coloring agent in various industrial processes. Its specific applications include:

• Textile Dyeing: For coloring wool, silk, and nylon fibers, providing excellent levelness and fastness properties.
• Leather Finishing: Imparts a uniform and durable yellow color to leather goods.
• Paper Staining: Used in the production of specialty colored papers and paper products.
• Ink Formulation: A component in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a stain in microscopy and histology for biological samples.

Basic Information

Product Name	C.I. Acid Yellow 223
CAS No.	71872-30-5
Molecular Formula	C21H16N4Na2O8S2
Molecular Weight	582.48 g/mol
Synonyms	Acid Yellow 223; C.I. 19190; Acid Leather Yellow N-GL; Nylosan Yellow N-GL; Telon Yellow N-GL; Acid Fast Yellow E-2G; 2,2'-(1,2-Ethenediyl)bis[5-[(4-sulfophenyl)azo]benzenesulfonic acid] disodium salt
EINECS	Contact for details

Quality Control

Our production of C.I. Acid Yellow 223 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance. Every lot is tested against established specifications for color strength, shade, solubility, and impurity profiles. A Certificate of Analysis (COA) documenting these results is provided with each 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 after 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)	≥ 95.0%
Color Strength	100 ± 3%
Moisture Content	≤ 5.0%
Water Solubility	Clear solution at 1%
Ash Content	≤ 30.0%

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