Description

Acid Yellow 158:1 is a high-performance, water-soluble monoazo acid dye. This product is valued for its bright, vivid yellow hue and excellent fastness properties, particularly in demanding dyeing applications. It is primarily used by manufacturers in the textile, leather, and paper industries seeking reliable and consistent coloration. The compound is supplied under the CAS registry number 908584-95-2.

Application

This specialized acid dye is engineered for a range of industrial coloring processes where durability and color fidelity are paramount.

• Textile Dyeing: Primary application for dyeing polyamide (nylon) fibers, wool, and silk, offering good wash and light fastness.
• Leather Finishing: Used for coloring leather goods, providing uniform and penetrating shades.
• Paper Coloration: Suitable for tinting specialty papers, including decorative and packaging grades.
• Ink Formulation: A colorant component in the manufacture of certain inks for non-food contact applications.
• Biomaterial Staining: Potential use in laboratory settings for histological staining.

Basic Information

Product Name	Acid Yellow 158:1
CAS No.	908584-95-2
Molecular Formula	C16H12N4Na2O8S2
Molecular Weight	534.4 g/mol
Synonyms	Acid Yellow 158:1; C.I. Acid Yellow 158:1; Acid Yellow 158, sodium salt; 2,7-Naphthalenedisulfonic acid, 5-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-, disodium salt; Lanyl Yellow G; Supranol Yellow GW; Nylosan Yellow E-G; Acid Leather Yellow G
EINECS	Contact for details

Quality Control

Our Acid Yellow 158:1 is manufactured under a strict quality management system. Every batch is tested to ensure consistent strength, shade, and chemical purity, meeting the specifications required for industrial dyeing processes. A comprehensive Certificate of Analysis (COA) detailing purity, strength, and impurity profiles is provided with each 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Strength (Color Value)	100 ± 3%
Moisture Content	Max. 5.0%
Water Insoluble Matter	Max. 0.5%
Shade	Conforms to standard
Fastness Properties	As per application requirements

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