Description

Thionine Blue is a synthetic organic dye belonging to the phenothiazine class, widely recognized for its vibrant color and redox-active properties. This compound is essential for applications requiring precise colorimetric analysis and serves as a critical reagent in various scientific and industrial processes. It is particularly valued by manufacturers and research laboratories in the biotechnology, histology, and analytical chemistry sectors for its consistent performance and high purity.

Application

• Biological Staining: Used as a metachromatic dye for staining nucleic acids (DNA/RNA) and acidic tissue components in histology and cytology.
• Redox Indicator: Employed in analytical chemistry and biochemistry as an electron transfer mediator or indicator in titrations and biosensors.
• Photographic Sensitizer: Acts as a spectral sensitizer in silver halide photographic emulsions.
• Textile Dyeing: Imparts a distinctive blue color to silk, wool, and other protein-based fibers.
• Research Reagent: Serves as a model compound in photochemistry, electrochemistry, and studies of dye aggregation.
• Lithography and Imaging: Utilized in specialized photoresist and imaging formulations.

Basic Information

Product Name	Thionine Blue
CAS No.	6990-74-5
Molecular Formula	C12H10ClN3S
Molecular Weight	263.75 g/mol
Synonyms	Thionine; Lauth's Violet; CI 52000; Phenothiazin-5-ium, 3,7-diamino-5-phenyl-, chloride; 3,7-Diamino-5-phenylphenothiazin-5-ium chloride; Basic Blue 9; Toluidine Blue O (closely related variant)
EINECS	230-271-2

Quality Control

Our Thionine Blue is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot is tested against rigorous in-house specifications, which typically include identity confirmation, purity assay, and impurity profiling. A Certificate of Analysis (COA) detailing the 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 away from incompatible materials.

Specification

Item	Specification
Appearance	Dark green to bronze crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0 %
Residue on Ignition (Sulfated Ash)	≤ 1.0 %
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, blue-violet solution

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