Description

p-Xylenolphthalein is a synthetic organic compound belonging to the phthalein dye family, primarily recognized as a pH indicator. Its core value lies in its distinct color change within a specific pH range, making it a critical reagent for precise endpoint determination in analytical chemistry. This compound is essential for industries and laboratories requiring accurate acid-base titrations and pH monitoring. Professionals in chemical manufacturing, quality control laboratories, and research institutions rely on its consistent performance for reliable analytical results.

Application

• pH Indicator in Titrations: Used as a visual endpoint indicator for acid-base titrations in both aqueous and non-aqueous systems.
• Analytical Chemistry Reagent: Employed in laboratory settings for the quantitative analysis of acids, bases, and salts.
• Educational Demonstrations: Serves as a teaching tool in academic laboratories to demonstrate pH concepts and titration techniques.
• Quality Control Testing: Applied in industrial QC processes to determine the concentration or purity of chemical products.
• Research & Development: Utilized in chemical synthesis and material science research where pH monitoring is crucial.
• Buffer Solution Calibration: Acts as a component in the preparation and verification of standard buffer solutions.

Basic Information

Product Name	p-Xylenolphthalein
CAS No.	50984-88-8
Molecular Formula	C24H22O4
Molecular Weight	374.43 g/mol
Synonyms	4',5'-Bis(dimethylamino)fluorescein; 3',6'-Bis(dimethylamino)fluoran; p-Xylenol Phthalein; Fluoran, 3',6'-bis(dimethylamino)-; 3,6-Bis(dimethylamino)-9H-xanthen-9-one; NSC 6175; Fluoran Green
EINECS	Contact for details

Quality Control

Our p-Xylenolphthalein is produced under strict quality management protocols to ensure batch-to-batch consistency and high purity suitable for analytical applications. Each lot undergoes comprehensive testing, including identification, assay, and impurity profile analysis. Certificates of Analysis (COA) detailing all test results are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials and sources of heat.

Specification

Item	Specification
Appearance	Green crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
pH Transition Range	8.0 - 9.6 (Colorless to Green)
Solubility	Soluble in ethanol, acetone; slightly soluble in water

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