Description

C. I. Acid Yellow 161 is a synthetic monoazo acid dye widely used for its bright and durable yellow coloration. This high-performance dye offers excellent lightfastness and wash fastness, making it a critical component for demanding applications where color stability is paramount. It is primarily sought after by manufacturers in the textile, leather, and paper industries for dyeing and printing protein-based fibers like wool, silk, and nylon.

Application

• Primary dyeing of wool, silk, and other protein fibers in the textile industry.
• Printing applications on nylon and silk fabrics.
• Leather dyeing for a consistent and vibrant yellow shade.
• Paper coloration, including specialty papers and packaging.
• Ink formulations for specific printing applications.
• As a colorant for polyamide fibers and blends.

Basic Information

Product Name	C. I. Acid Yellow 161
CAS No.	47872-95-7
Molecular Formula	C21H18N4Na2O8S2
Molecular Weight	580.50 g/mol
Synonyms	Acid Yellow 161; C.I. 13906; Acid Leather Yellow G; Acid Fast Yellow E-2G; Nylosan Yellow E-2G; Telon Yellow GRL; Supranol Yellow GW; Erionyl Yellow A-2G; Acid Yellow GW; 2,7-Naphthalenedisulfonic acid, 5-[[4-[(2,4-dinitrophenyl)azo]phenyl]amino]-3-[[4-[(2,4-dinitrophenyl)azo]phenyl]amino]-, disodium salt
EINECS	Contact for details

Quality Control

Our C. I. Acid Yellow 161 is manufactured under strict quality control protocols to ensure batch-to-batch consistency and compliance with industry colorant standards. Each lot is tested for key parameters including shade, strength, solubility, and fastness properties. A Certificate of Analysis (COA) detailing these specifications 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 incompatible materials. The product is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Lightfastness	≥ 5-6 (ISO 105-B02)
Wash Fastness	≥ 4-5 (ISO 105-C03)

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