Description

Astra Blue 6Gll CAS NO 33481-16-2 is a high-purity synthetic dye belonging to the triarylmethane class, valued for its intense and stable blue coloration. It is engineered to deliver consistent performance and batch-to-batch uniformity, which is critical for industrial applications requiring precise color matching. This product is essential for manufacturers in the textile, ink, and specialty coatings industries seeking reliable and vibrant blue pigments.

Application

• Textile Dyeing and Printing: Used for coloring natural and synthetic fibers, including cotton, wool, and polyester, providing excellent color fastness.
• Ink Formulation: Serves as a key pigment in the production of printing inks for packaging, publications, and security applications.
• Industrial Coatings and Paints: Imparts durable blue color to industrial paints, automotive finishes, and decorative coatings.
• Paper Coloring: Employed in the surface coloring and coating of specialty papers and boards.
• Plastics and Polymers: Used as a colorant for masterbatch and compound production for colored plastic products.
• Biological Staining: May be utilized in histological and microbiological staining procedures in laboratory settings.

Basic Information

Product Name	Astra Blue 6Gll
CAS No.	33481-16-2
Molecular Formula	C29H32ClN3O6S2
Molecular Weight	626.15 g/mol
Synonyms	Astra Blue 6G; Astra Blue 6G LL; C.I. 42051; Acid Blue 83; Erioglaucine A; Lissamine Blue; Patent Blue V; Sodium [4-(α-(4-diethylaminophenyl)-5-hydroxy-2,4-disulfophenylmethylidene)-2,5-cyclohexadien-1-ylidene]diethylammonium chloride
EINECS	251-522-5

Quality Control

Our Astra Blue 6Gll is produced under a strict quality management system. Every batch undergoes comprehensive analytical testing, including chromatographic purity analysis and color strength assessment, to ensure it meets exacting specifications for industrial use. A Certificate of Analysis (COA) detailing purity, identity, and physical parameters is provided with each shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after use to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	Dark blue to blue-black powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water-Soluble Matter	Conforms
Heavy Metals (as Pb)	≤ 20 ppm
Color Strength	100 ± 5% (vs. Standard)

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