Description

Stains-All CAS NO 7423-31-6 is a versatile cationic carbocyanine dye widely recognized for its unique metachromatic staining properties. This compound is critical for researchers and industrial labs requiring a single, reliable stain for complex biomolecular analysis and material characterization. It is an essential tool for professionals in life sciences, polymer research, and diagnostic development who need to differentiate between various polyanionic substrates with high sensitivity.

Application

• Biochemical Staining: Used for the differential staining of nucleic acids (DNA and RNA), glycosaminoglycans, and phosphoproteins on electrophoretic gels and blots.
• Histology & Cytology: Employed as a metachromatic stain for acid mucopolysaccharides and other polyanionic components in tissue sections.
• Polymer & Material Science: Acts as a sensitive probe for characterizing surface charges and anionic groups in synthetic polymers, membranes, and nanomaterials.
• Quality Control in Pharmaceuticals: Utilized in the analysis of heparin, chondroitin sulfate, and other glycosaminoglycan-based drug substances.
• Diagnostic Reagent Formulation: A key component in developing staining kits and reagents for clinical and research diagnostics.
• Photographic & Imaging Applications: Functions as a spectral sensitizer in certain photographic emulsions and optical recording media.

Basic Information

Product Name	Stains-All
CAS No.	7423-31-6
Molecular Formula	C₄₉H₄₇N₃O₆S₂
Molecular Weight	830.04 g/mol
Synonyms	Stains All; 1-Ethyl-2-[3-(1-ethylnaphtho[1,2-d]thiazolin-2-ylidene)-2-methylpropenyl]naphtho[1,2-d]thiazolium bromide; Stains-all dye; C.I. 45010; Basic Blue 20; Ethyl 2-[3-(1-ethyl-1,2-dihydro-2-benzothiazolylidene)-2-methyl-1-propen-1-yl]-1,2-dihydro-1-benzothiazolium bromide
EINECS	231-060-8

Quality Control

Our Stains-All is produced and tested under a rigorous quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is characterized for critical parameters including identity, purity, and spectral properties. A comprehensive Certificate of Analysis (COA) detailing specifications and 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 place at a controlled room temperature (15-25°C). The product is light-sensitive and should be handled under appropriate conditions to prevent degradation.

Specification

Item	Specification
Appearance	Dark green to blue-green powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0 %
Residue on Ignition	≤ 1.0 %
Absorption Maxima	Meets typical spectral profile

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