Description

Thionine(Acetate) CAS NO 635-76-7 is a synthetic organic dye belonging to the phenothiazine class, widely recognized for its role as a redox indicator and biological stain. Its core value proposition lies in its reliable and distinct colorimetric properties, which are essential for precise analytical and diagnostic procedures. This product is primarily needed by manufacturers and research laboratories in the life sciences, histology, and analytical chemistry sectors.

Application

• Biological Staining: Used as a metachromatic dye for staining nucleic acids (DNA/RNA) and acidic polysaccharides in histology and cytology.
• Redox Indicator: Serves as a key component in various titrimetric and electrochemical analyses due to its reversible color change between oxidized and reduced states.
• Photodynamic Therapy (PDT) Research: Investigated as a potential photosensitizer in research applications for its ability to generate reactive oxygen species upon light activation.
• Battery & Electrochemical Research: Utilized in studies of organic electrode materials and energy storage systems.
• Microbiological Staining: Applied in specific staining protocols for microorganisms.
• Chemical Synthesis: Acts as a precursor or intermediate in the synthesis of other phenothiazine derivatives and complex organic molecules.

Basic Information

Product Name	Thionine(Acetate)
CAS No.	635-76-7
Molecular Formula	C12H10N3S·C2H3O2
Molecular Weight	287.33 g/mol (Free base: 263.31 g/mol)
Synonyms	Thionine acetate salt; Lauth's violet acetate; 3,7-Diamino-5-phenothiazinium acetate; CI 52000; Thionine, acetate; Phenothiazin-5-ium, 3,7-diamino-, acetate; Basic Blue 25 (acetate); Thionine blue
EINECS	211-239-7

Quality Control

Our Thionine(Acetate) is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure compliance with high-purity standards for research and industrial use. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept tightly sealed and away from direct light exposure to maintain stability and purity.

Specification

Item	Specification
Appearance	Dark green to black crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0 %
Solubility (Water)	Passes test
Heavy Metals (as Pb)	≤ 20 ppm

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