Description

Primuline is a synthetic organic dye belonging to the thiazole class, widely recognized for its use as a direct dye for cotton and as a biological stain. Its significance lies in its ability to provide a distinctive yellow coloration and its utility in specialized staining techniques for microscopic analysis. This product is essential for industries and research laboratories involved in textile dyeing, histology, and cytology, where consistent quality and reliable performance are paramount.

Application

• Textile Dyeing: Used as a direct dye for coloring cotton, wool, and silk fibers, providing good lightfastness.
• Biological Staining: Employed in histology and cytology for staining tissues and cell structures, particularly in specific staining protocols.
• Paper Coloring: Applied in the manufacture of colored papers and specialty packaging materials.
• Leather Finishing: Used for dyeing leather goods to achieve consistent and vibrant yellow hues.
• Ink Formulation: A component in the production of inks for specialized printing applications.
• Research & Development: Serves as a chemical intermediate or reagent in synthetic organic chemistry and analytical research.

Basic Information

Product Name	Primuline
CAS No.	8064-60-6
Molecular Formula	Mixture (Primuline is a mixture of thiazole-based dyes)
Molecular Weight	Contact for details
Synonyms	C.I. Direct Yellow 59; C.I. 49000; Primuline Spirit Soluble; Primuline O; Direct Yellow 59; Thiazol Yellow; Clayton Yellow; 2,2'-(1-Triazene-1,3-diyl)bis[5-(1,3-benzothiazol-2-yl)benzenesulfonic acid] (component); Primuline Base
EINECS	Contact for details

Quality Control

Our Primuline is manufactured under strict quality management systems to ensure batch-to-batch consistency and reliability. Each lot undergoes comprehensive analytical testing, including purity assay, identification, and assessment of key physical properties. Certificates of Analysis (COA) detailing the specific results for all tested parameters are available upon request to support your quality assurance and regulatory compliance 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 incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Yellow to brownish-yellow powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	Min. 85%
Solubility (in Water)	Soluble, clear solution
Loss on Drying	Max. 5.0%
Ash Content	Max. 1.0%

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