Description

Direct Yellow 17 is a synthetic anionic azo dye belonging to the direct dye class, known for its bright yellow hue and strong affinity for cellulosic fibers. Its primary value lies in providing excellent colorfastness to washing and good lightfastness on cotton, rayon, and paper, making it a cost-effective coloring solution. This product is essential for manufacturers in the textile dyeing, paper coloring, and leather finishing industries seeking reliable and vibrant yellow shades. The compound is supplied as a high-purity powder to ensure consistent batch-to-batch performance in industrial applications.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose rayon, and other cellulosic fibers to achieve a bright yellow color.
• Paper Coloring: Used in the production of colored papers, tissues, and packaging materials.
• Leather Finishing: Imparts color to leather goods in the tanning industry.
• Ink Formulation: A colorant component in certain types of inks for stamp pads and other applications.
• Biological Staining: Occasionally used as a histological stain in laboratory settings.
• Craft and Specialty Dyes: Suitable for use in batik, tie-dye, and other craft dyeing projects.

Basic Information

Product Name	Direct Yellow 17
CAS No.	6537-65-1
Molecular Formula	C30H26N4Na2O8S2
Molecular Weight	680.66 g/mol
Synonyms	Direct Yellow R; C.I. Direct Yellow 17; Sirius Yellow R; Pontamine Yellow R; Benzo Fast Yellow R; Diazol Yellow R; Direct Fast Yellow R; Aizen Direct Yellow RH; Atlantic Direct Yellow R; Chloramine Yellow R; Pyrazol Yellow R
EINECS	229-439-4

Quality Control

Our Direct Yellow 17 is manufactured under a stringent quality management system to ensure it meets the high standards required for industrial dyeing processes. Each batch is tested for critical parameters including color strength, shade, solubility, and impurity profile to guarantee consistency and performance. Certificates of Analysis (COA) detailing purity, physical properties, and conformance to specification are available upon request.

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. The product is light-sensitive and should be stored away from direct light exposure to prevent degradation.

Specification

Item	Specification
Appearance	Brownish-yellow to reddish-yellow powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0
Ash Content	Max. 1.0%
Lightfastness (on cotton)	Good
Washfastness (on cotton)	Good to Very Good

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