Description

Acid Yellow 61 is a synthetic anionic dye belonging to the azo chemical class, valued for its bright, stable yellow hue. It is a critical component for achieving consistent and vibrant coloration in a variety of industrial substrates. This product is essential for manufacturers in the textile, leather, and paper industries seeking high-performance, cost-effective dyeing solutions.

Application

• Textile Dyeing: Primary application for dyeing nylon, silk, and wool fibers, providing excellent wash and light fastness.
• Leather Finishing: Used for coloring leather goods, offering uniform penetration and rich color depth.
• Paper Coloration: Employed in the production of colored papers, specialty packaging, and decorative items.
• Ink Formulation: A key pigment for manufacturing inks used in writing instruments, stamp pads, and flexographic printing.
• Biological Staining: Utilized in histology and microbiology as a staining agent for microscopic analysis.
• Plastics and Polymers: Incorporated for mass coloration of certain plastics to achieve specific yellow shades.

Basic Information

Product Name	Acid Yellow 61
CAS No.	12217-38-8
Molecular Formula	C18H14N3NaO3S
Molecular Weight	375.38 g/mol
Synonyms	Acid Yellow 61; C.I. 18968; 2,2'-(1,2-Ethenediyl)bis[5-[(4-sulfophenyl)azo]benzenesulfonic acid] disodium salt; 2,2'-(1,2-Ethenediyl)bis(5-((4-sulfophenyl)azo)benzenesulfonic acid) disodium salt; Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-[(4-sulfophenyl)azo]-, disodium salt; Lissamine Yellow 2G; Acid Leather Yellow EG; Dermina Yellow 2G
EINECS	235-417-8

Quality Control

Our Acid Yellow 61 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile. A Certificate of Analysis (COA) detailing purity, physical properties, and conformance to specification 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). Keep away from strong oxidizing agents. 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)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to 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.