Description

C.I. Acid Yellow 70 is a synthetic organic dye belonging to the azo chemical class, valued for its bright and stable yellow hue. It is a critical component for imparting consistent and durable coloration to various substrates, particularly in demanding industrial applications. This dye is primarily sought by manufacturers in the textile, leather, and paper industries for dyeing and printing processes.

Application

• Textile Dyeing: Primary application for dyeing nylon, wool, and silk fibers, offering good wash and light fastness.
• Leather Finishing: Used for coloring leather goods, providing rich and uniform shades.
• Paper Coloring: Employed in the production of colored papers, including specialty and decorative papers.
• Ink Formulation: A key pigment for manufacturing inks used in writing instruments, stamp pads, and other applications.
• Wood Staining: Utilized to provide transparent, penetrating color for wood products.
• Biological Staining: Potential use as a microscopic stain in laboratory settings (specific grades required).

Basic Information

Product Name	C.I. Acid Yellow 70
CAS No.	12235-20-0
Molecular Formula	C16H12N4Na2O7S2
Molecular Weight	478.40 g/mol
Synonyms	Acid Yellow 70; C.I. 18950; Acid Leather Yellow G; Acid Fast Yellow G; Naphthol Yellow S; Wool Yellow S; Lissamine Yellow G; Acid Yellow G; Hexacol Yellow G; Supranol Yellow G; Xylene Fast Yellow G; Telon Yellow G
EINECS	Contact for details

Quality Control

Our production of C.I. Acid Yellow 70 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed for key parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory needs.

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
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Ash Content	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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