Description

Iodophenol Blue CAS NO 4430-24-4 is a synthetic organic dye belonging to the class of triphenylmethane derivatives, widely recognized as a sensitive pH indicator. Its primary value lies in its distinct and reversible color change, making it an indispensable tool for precise endpoint detection in analytical chemistry and quality control processes. This compound is essential for industries and laboratories requiring reliable visual or photometric titration methods, particularly in biochemical research and pharmaceutical analysis.

Application

• pH Indicator in Titrations: Used as a visual and photometric indicator for acid-base titrations, especially in non-aqueous or mixed solvent systems.
• Biochemical Research: Employed in enzymatic assays and protein studies where specific pH ranges must be monitored.
• Pharmaceutical Analysis: Utilized in the quality control testing of active pharmaceutical ingredients (APIs) and excipients.
• Diagnostic Reagents: A key component in the formulation of certain clinical diagnostic kits and test strips.
• Chemical Education & Standardization: Serves as a reference standard in analytical chemistry laboratories for method development and calibration.
• Dye Intermediate: Acts as a precursor or intermediate in the synthesis of more complex dyes and pigments.

Basic Information

Product Name	Iodophenol Blue
CAS No.	4430-24-4
Molecular Formula	C19H14I3NO3
Molecular Weight	689.04 g/mol
Synonyms	4,4'-(4-Imino-2,5-cyclohexadien-1-ylidene)bis(2,6-diiodophenol); Iodophenol Blue Indicator; NSC 403697; C.I. 87850; Aurintricarboxylic acid triiodo derivative; p-Rosaniline triiodo derivative; Triphenylmethane dye triiodo derivative
EINECS	224-632-9

Quality Control

Our Iodophenol Blue is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including identity confirmation by IR spectroscopy and purity assessment by HPLC, to ensure it meets the high standards required for analytical and research applications. A Certificate of Analysis (COA) detailing all test results 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark green to blue-black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
pH Transition Range	3.0 - 4.6 (Colorless to Blue)
Residue on Ignition	≤ 0.1%

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