Description

Indigotetrasulfonic Acid is a synthetic, water-soluble derivative of indigo, known for its intense blue color and utility as a vital biological stain and diagnostic reagent. Its high purity and consistent performance make it a critical component for ensuring accurate results in laboratory and clinical settings. This product is essential for manufacturers and research institutions in the life sciences, diagnostics, and analytical chemistry sectors.

Application

• Biological Staining: Widely used as a vital stain in microscopy, particularly for highlighting cellular structures and in various histological procedures.
• Diagnostic Reagents: A key component in diagnostic kits and test strips, such as those used for kidney function assessment (e.g., as an indicator in urine test strips).
• Analytical Chemistry: Employed as a redox indicator in titrations and as a colorimetric reagent in spectrophotometric assays.
• Research & Development: Utilized in biochemical and pharmaceutical research for studying enzyme activity, membrane permeability, and as a tracer.
• Dye Intermediate: Serves as a precursor or intermediate in the synthesis of specialized dyes and pigments.

Basic Information

Product Name	Indigotetrasulfonic Acid
CAS No.	6371-42-2
Molecular Formula	C16H8N2O11S4
Molecular Weight	548.44 g/mol
Synonyms	Indigo Carmine; Acid Blue 74; FD&C Blue No. 2; Food Blue 1; Soluble Indigo Blue; 5,5'-Indigotindisulfonic Acid Disodium Salt; Indigotine; C.I. 73015
EINECS	228-921-5

Quality Control

Our Indigotetrasulfonic Acid is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity, spectroscopy for identification, and tests for residual solvents and heavy metals to ensure it meets high-purity standards suitable for diagnostic and research applications. A detailed Certificate of Analysis (COA) is provided with every shipment.

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). This material is hygroscopic (moisture-sensitive); ensure the container is sealed tightly after each use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to purple-blue powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Completely soluble

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