Description

C.I. Acid Yellow 234 is a synthetic organic dye belonging to the azo chemical class, valued for its bright, vivid yellow hue and strong affinity for protein-based fibers like wool, silk, and nylon. Its primary commercial importance lies in providing excellent light and wash fastness properties, ensuring color durability in demanding applications. This high-performance acid dye is essential for manufacturers in the textile, leather finishing, and specialty paper industries seeking reliable and consistent coloration.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, nylon, and modified acrylic fibers to achieve brilliant yellow shades.
• Leather Coloring: Used in the finishing process for dyeing leather goods, providing uniform and fast colors.
• Paper Staining: Employed for the coloration of specialty papers, including decorative and security papers.
• Ink Formulation: A key component in the manufacture of inks for ballpoint pens, ink-jet printing, and stamp pads.
• Biological Staining: Potential use as a microscopic stain in histology and cytology laboratories.
• Plastics and Polymers: Can be used for coloring certain types of plastics and synthetic materials.

Basic Information

Product Name	C.I. Acid Yellow 234
CAS No.	77907-20-1
Molecular Formula	C16H14N4Na2O7S2
Molecular Weight	492.41 g/mol
Synonyms	Acid Yellow 234; C.I. 18970; Acid Leather Yellow G; Acid Fast Yellow G; Acidol Yellow M-G; Amacid Fast Yellow G; Dermacid Yellow G; Suracid Yellow G; Telon Fast Yellow G; Yellow Acid Leather G
EINECS	Contact for details

Quality Control

Our production of C.I. Acid Yellow 234 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and impurity profile to meet precise customer specifications. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and conformance 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). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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