Description

Indigodisulfonate Dipotassium Salt is a water-soluble, blue-colored organic salt derived from indigotin. This compound serves as a vital analytical reagent and colorimetric indicator, valued for its precise and predictable chemical behavior in solution. It is primarily utilized by research laboratories, quality control facilities, and manufacturers in the pharmaceutical, diagnostic, and chemical synthesis sectors for standardized testing and analysis.

Application

• Analytical Chemistry: Used as a redox indicator and colorimetric reagent in titrations and spectrophotometric assays.
• Diagnostic Reagent Manufacturing: A key component in the formulation of clinical diagnostic kits and test strips.
• Pharmaceutical Research & Development: Employed in analytical method development and quality control testing of active pharmaceutical ingredients (APIs).
• Biochemical Staining: Functions as a biological stain in microscopy and histology for specific tissue or cellular component identification.
• Dye Intermediate: Acts as a precursor or intermediate in the synthesis of specialized dyes and pigments.
• Laboratory Reference Standard: Serves as a high-purity standard for calibrating instruments and validating analytical methods.

Basic Information

Product Name	Indigodisulfonate Dipotassium Salt
CAS No.	28606-02-2
Molecular Formula	C16H8K2N2O8S2
Molecular Weight	514.57 g/mol
Synonyms	Indigo Carmine Dipotassium Salt; Indigotindisulfonate Dipotassium Salt; FD&C Blue No. 2; Acid Blue 74; C.I. 73015; 5,5'-Indigodisulfonic Acid Dipotassium Salt; Indigo-5,5'-disulfonic Acid Dipotassium Salt
EINECS	249-125-4

Quality Control

Our Indigodisulfonate Dipotassium Salt is manufactured under strict quality management systems. Each batch is subjected to comprehensive analytical testing, including identification, purity assay, and impurity profiling, to ensure it meets exacting standards for research and industrial use. A Certificate of Analysis (COA) detailing all test results 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 area at a controlled room temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Blue to dark blue powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0 %
Residue on Ignition (Sulfated Ash)	28.0 - 32.0 %
Water Solubility	Clear, blue solution
Heavy Metals (as Pb)	≤ 20 ppm

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