Description

Potassium Indigotrisulfonate is a water-soluble, blue organic salt derived from indigo, widely recognized as a vital biological stain and analytical reagent. Its primary value lies in its selective staining properties and its role as a redox indicator in various chemical and biological assays. This compound is essential for professionals in histology, microbiology, and analytical chemistry, serving critical functions in laboratory diagnostics and research.

Application

• Biological Staining: Used as a vital stain for microscopic examination of cells and tissues, particularly for highlighting specific cellular structures.
• Microbiological Media: Employed as an indicator in culture media to differentiate bacterial species based on metabolic activity.
• Redox Titration Indicator: Functions as a visual indicator in titrimetric analysis for determining the endpoint of redox reactions.
• Clinical Diagnostics: Applied in specific test kits and reagents for clinical laboratory procedures.
• Textile Industry: Historically used as a dye intermediate; modern applications may include specialized coloring processes.
• Research & Development: Serves as a key reagent in biochemical and pharmaceutical research for assay development.

Basic Information

Item	Details
Product Name	Potassium Indigotrisulfonate
CAS No.	67627-18-3
Molecular Formula	C16H7K3N2O11S3
Molecular Weight	616.71 g/mol
Synonyms	Indigo Carmine, Potassium Salt; FD&C Blue No. 2; Acid Blue 74; C.I. 73015; Indigotine; E132; Indigotindisulfonate Sodium (related compound); CI 73015
EINECS	Contact for details

Quality Control

Our Potassium Indigotrisulfonate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets high-purity standards suitable for laboratory and diagnostic applications. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Blue to dark blue powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 85.0%
Loss on Drying	≤ 12.0 %
Water-insoluble matter	≤ 0.5 %
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm

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