Description

Acid Yellow 216 is a synthetic organic dye belonging to the acid dye class, identified by CAS No. 71872-28-1. This high-performance colorant is valued for its strong affinity for protein fibers like wool, silk, and nylon, delivering bright, wash-fast yellow shades. It is a critical component for manufacturers in the textile, leather, and paper industries seeking vibrant and durable coloration solutions.

Application

• Primary dyeing and printing of wool, silk, and polyamide (nylon) fibers in the textile industry.
• Coloration of leather goods, providing uniform and penetrating color.
• Production of colored paper and paperboard for packaging and specialty products.
• Manufacturing of inks for various marking and writing applications.
• Dyeing of feathers and furs for fashion and decorative items.
• Potential use as a stain or biological marker in laboratory and research settings.

Basic Information

Product Name	Acid Yellow 216
CAS No.	71872-28-1
Molecular Formula	C21H18N4Na2O7S2
Molecular Weight	556.50 g/mol
Synonyms	Acid Yellow G; C.I. Acid Yellow 216; Acid Fast Yellow G; Acid Leather Yellow G; Aminyl Yellow E-GL; Apollo Acid Yellow G; Atul Acid Fast Yellow G; Derma Yellow G; Dinacid Fast Yellow G; Duasyn Acid Yellow G; Eniacid Fast Yellow G; Hispacid Fast Yellow G; Kayanol Yellow G; Leder Yellow G; Nylosan Yellow E-GL; Sandolan Yellow E-GL; Suracid Yellow G; Telon Yellow G; Vicoacid Yellow 7G
EINECS	Contact for details

Quality Control

Our Acid Yellow 216 is manufactured under strict quality management systems to ensure batch-to-batch consistency and performance. Each lot is tested against stringent in-house specifications for color strength, shade, solubility, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing all test results 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). This product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture, which may affect performance.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Within agreed tolerance
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Assay (HPLC)	≥ 95.0%
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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