Description

Acid Yellow 117 is a synthetic organic dye belonging to the azo class, known for its bright and vivid yellow hue. This high-performance colorant is valued for its strong tinctorial strength and good fastness properties, 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 durable coloration.

Application

• Textile Dyeing: Used for dyeing nylon, wool, and silk fibers, providing excellent wash and light fastness.
• Leather Finishing: Imparts a uniform and vibrant yellow color to various types of leather goods.
• Paper Coloring: Employed in the production of colored papers, including specialty and decorative papers.
• Ink Formulation: Serves as a colorant in the manufacture of inks for various printing applications.
• Plastics and Polymers: Can be used for mass coloration of certain plastics where compatibility is confirmed.

Basic Information

Product Name	Acid Yellow 117
CAS No.	6459-70-7
Molecular Formula	C16H13ClN4Na2O7S2
Molecular Weight	550.86 g/mol
Synonyms	Acid Yellow A; C.I. Acid Yellow 117; Acid Leather Yellow A; Acid Fast Yellow A; Yellow Acid Leather Dye A; 7-Hydroxy-8-[(E)-(4-sulfonatophenyl)diazenyl]-1,3-naphthalenedisulfonic acid disodium salt; 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[(4-sulfophenyl)azo]-, disodium salt
EINECS	229-265-7

Quality Control

Our Acid Yellow 117 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against stringent internal specifications for color strength, shade, solubility, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and conformance is provided with every shipment.

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). This product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
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.