Description

C.I.Acid Yellow 111 is a synthetic organic dye belonging to the azo chemical class, widely recognized for its bright and durable yellow hue. This high-performance colorant is valued for its excellent lightfastness and wash fastness, making it a reliable choice for demanding industrial applications. It is primarily utilized by manufacturers in the textile, leather, and paper industries seeking consistent and vibrant coloration.

Application

• Textile Dyeing: Primary application for dyeing protein fibers like wool, silk, and nylon, providing excellent color yield and fastness properties.
• Leather Finishing: Used for coloring leather goods, offering rich, uniform shades with good adhesion and durability.
• Paper Coloring: Employed in the production of specialty papers, decorative papers, and packaging materials.
• Ink Formulation: A key component in the manufacture of inks for various printing applications, including flexographic and packaging inks.
• Wood Staining: Suitable for imparting a yellow color to wood surfaces in furniture and decorative applications.
• Biological Staining (Histology): May be used in specific laboratory staining protocols for microscopic analysis.

Basic Information

Product Name	C.I.Acid Yellow 111
CAS No.	12239-17-7
Molecular Formula	C16H13N4NaO4S
Molecular Weight	380.35 g/mol
Synonyms	Acid Yellow 111; C.I. 18866; Acid Leather Yellow G; Acid Fast Yellow G; Acidol Yellow M-G; Amacid Yellow G; Derma Yellow G; Telon Yellow G; Supranol Yellow GW; Lissamine Yellow G; Acid Yellow GW; Yellow Acid 111
EINECS	235-453-0

Quality Control

Our production of C.I.Acid Yellow 111 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and fastness properties. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with every shipment to support your quality assurance processes.

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 incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Ash Content	Max. 1.0%
Light Fastness	Good to Very Good
Wash Fastness	Good to Very Good

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