Description

Azocarmine G is a synthetic azo dye belonging to the carmine dye family, identified by CAS No. 25641-18-3. It serves as a versatile biological stain and colorimetric indicator, valued for its specific staining properties in histological and cytological applications. This product is essential for research laboratories, diagnostic facilities, and industrial settings requiring precise colorants for microscopic analysis and material testing.

Application

• Histological Staining: Used as a specific stain for connective tissue, cartilage, and mucin in biological sample preparation for microscopy.
• Cytological Analysis: Employed in differential staining protocols to visualize cellular structures and components under a microscope.
• Textile Dyeing: Functions as a colorant for dyeing natural and synthetic fibers in specialized textile applications.
• Ink Formulation: Incorporated as a pigment in the manufacturing of specialized inks for printing and marking.
• Biological Indicator: Acts as a pH or redox indicator in certain analytical and research chemistry procedures.
• Educational & Research: A key reagent in academic and industrial research laboratories for teaching and experimental protocols involving staining techniques.

Basic Information

Product Name	Azocarmine G
CAS No.	25641-18-3
Molecular Formula	C28H19N3Na2O9S2
Molecular Weight	651.57 g/mol
Synonyms	Acid Red 103; C.I. 50085; Azokarmin G; Azocarmine GX; Azocarmin G; Azo Carmine G; Azocarmine, water soluble; 3-[(E)-(4-sulfonato-1-naphthyl)diazenyl]-4-hydroxy-2-naphthoic acid disodium salt
EINECS	247-144-2

Quality Control

Our Azocarmine G is produced and tested under a rigorous quality management system to ensure batch-to-batch consistency and performance reliability for critical applications. Each lot is analyzed to confirm identity, purity, and staining performance. A comprehensive Certificate of Analysis (COA) detailing specific test results is provided with every shipment to support your quality assurance protocols.

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). Keep the container tightly sealed when not in use to protect the product from moisture and contamination.

Specification

Item	Specification
Appearance	Dark red to brownish-red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 85% (Dye content)
Loss on Drying	≤ 5.0 %
Solubility (Water)	Soluble, clear solution
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.