Description

Indigotetrisulfonate Tetrapotassium Salt is a high-purity, water-soluble salt of the indigo dye derivative, indigotetrasulfonate. This compound is valued for its intense blue color and consistent performance as a vital analytical reagent and diagnostic agent. It is primarily required by manufacturers and research laboratories in the pharmaceutical, diagnostic, and analytical chemistry sectors for precise colorimetric applications.

Application

• Diagnostic Reagent: A key component in clinical test kits, particularly for kidney function tests (e.g., measurement of glomerular filtration rate).
• Analytical Chemistry: Used as a redox indicator and a colorimetric reagent in various titrations and spectrophotometric assays.
• Biological Staining: Employed in histological and microbiological staining procedures to visualize specific cellular structures.
• Pharmaceutical Intermediates: Serves as a precursor or an intermediate in the synthesis of specialized pharmaceutical compounds.
• Research & Development: Utilized in biochemical and medical research for experimental protocols requiring a stable, colored marker.
• Dye for Specialized Applications: Functions as a colorant in specific non-textile applications where its chemical properties are advantageous.

Basic Information

Product Name	Indigotetrasulfonate Tetrapotassium Salt
CAS No.	28699-96-9
Molecular Formula	C16H6K4N2O14S4
Molecular Weight	748.90 g/mol
Synonyms	Indigo Carmine Tetrapotassium Salt; Potassium Indigotetrasulfonate; Indigotine Tetrapotassium Salt; FD&C Blue No. 2 Tetrapotassium Salt; Acid Blue 74 Tetrapotassium Salt; CI 73015 Tetrapotassium Salt; 5,5′-Indigodisulfonic Acid Tetrapotassium Salt; Indigotindisulfonate Sodium (related compound)
EINECS	Contact for details

Quality Control

Our Indigotetrasulfonate Tetrapotassium Salt is manufactured under a strict quality management system. Each batch is tested to ensure it meets high-purity standards suitable for diagnostic and analytical applications. A comprehensive Certificate of Analysis (COA), detailing parameters such as assay, impurity profile, and identification, is provided with every shipment to guarantee traceability and compliance with your specifications.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to bluish-black powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	5.0 - 7.0
Heavy Metals (as Pb)	≤ 20 ppm

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