Description

Methyl Purple CAS NO 1340-02-9 is a triphenylmethane dye widely recognized as a versatile pH indicator and biological stain. Its primary value lies in its distinct color change, which provides a reliable visual endpoint for titration and analytical procedures in various scientific and industrial settings. This product is essential for laboratories, quality control departments, and research facilities involved in chemical analysis, histology, and educational demonstrations.

Application

• pH Indicator in Titrations: Used as a visual endpoint indicator in acid-base titrations, particularly in non-aqueous or specific pH range analyses.
• Biological Staining: Employed in histology and microscopy for staining tissue samples to enhance contrast and visibility under a microscope.
• Laboratory Reagent: Serves as a standard reagent in analytical chemistry for testing and calibration purposes.
• Educational Demonstrations: Utilized in academic settings to teach principles of acid-base chemistry and colorimetric analysis.
• Quality Control Testing: Applied in industrial QC labs for the quantitative analysis of raw materials and finished products.
• Research & Development: Used in chemical and biochemical research projects involving pH measurement and dye chemistry.

Basic Information

Product Name	Methyl Purple
CAS No.	1340-02-9
Molecular Formula	C37H42N3O6S+
Molecular Weight	664.81 g/mol
Synonyms	Methyl Violet 2B; Basic Violet 1; Gentian Violet B; Hexamethylpararosaniline Chloride; Aniline Violet; Paris Violet; Pyoktanin; C.I. 42535; Methylrosanilinium Chloride
EINECS	215-753-7

Quality Control

Our Methyl Purple is produced and tested under a stringent quality management system to ensure batch-to-batch consistency and reliability. Each lot is analyzed for key parameters including identity, purity, and dye content to meet the specifications required for precise analytical work. A Certificate of Analysis (COA) detailing these 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 room temperature (15-25°C). Keep away from incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain stability and performance.

Specification

Item	Specification
Appearance	Dark green powder with metallic luster
Identification (IR)	Conforms to structure
Assay (Dye Content)	≥ 85%
Loss on Drying	≤ 5.0%
Solubility	Soluble in water and ethanol
pH (1% Solution)	2.0 - 4.0
Heavy Metals (as Pb)	≤ 20 ppm

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