Description

Phenolphthalein Disulfate Potassium Salt is a specialized organic salt derivative of phenolphthalein, primarily valued as a key intermediate and reagent in advanced chemical synthesis and analytical applications. Its disulfate structure makes it a crucial precursor for developing pH-sensitive indicators, diagnostic agents, and functional dyes. This high-purity compound is essential for manufacturers and R&D laboratories in the pharmaceutical, analytical chemistry, and specialty chemical sectors seeking reliable, consistent performance in sensitive formulations.

Application

• Pharmaceutical Intermediate: Synthesis of prodrugs, diagnostic agents, and specialized active pharmaceutical ingredients (APIs).
• Analytical Chemistry Reagent: Used in the preparation of high-sensitivity pH indicators and colorimetric detection kits for laboratory analysis.
• Biochemical Research: Employed in enzyme assays and as a substrate or probe in developing detection methodologies for biological systems.
• Dye & Pigment Precursor: Serves as a key building block in the synthesis of specialized triarylmethane dyes and functional colorants.
• Chemical Synthesis: Acts as a versatile intermediate for introducing the phenolphthalein moiety into more complex molecular architectures.
• Quality Control & Standard: Utilized as a reference standard in pharmaceutical quality control and method validation protocols.

Basic Information

Product Name	Phenolphthalein Disulfate Potassium Salt
CAS No.	52322-16-4
Molecular Formula	C20H12K2O10S2
Molecular Weight	562.62 g/mol
Synonyms	Phenolphthalein Dipotassium Disulfate; Phenolphthalein Potassium Disulfate; 3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone Disulfate Dipotassium Salt; PSP (Phenolphthalein Sulfate Potassium); Dipotassium Phenolphthalein Disulfate; 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxyphenyl)-, disulfate, dipotassium salt
EINECS	Contact for details

Quality Control

Our Phenolphthalein Disulfate Potassium Salt is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity suitable for research and industrial use. Each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles. We support compliance with relevant guidelines and can provide material for qualification under cGMP or other regulatory frameworks as required.

Storage

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

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%

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