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Phenolphthalein
CAS Number: 77-09-8
Molecular Formula: C20H14O4
Molecular Weight: 318.32
Phenolphthalein
Phenolphthalein Analytical Reagent Grade Specifications
3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone
3,3-Bis(p-hydroxyphenyl)phthalide
C20H1404:Formula Weight 318.33
CAS Number 77-09-8
REQUIREMENTS
Clarity of alcohol solution: Passes test
Visual transition interval: From pH 8.0 (colorless) to pH 10 (red)
TESTS
Clarity of Alcohol Solution. Dissolve 1.0 g in 100 mL of ethyl alcohol. Not more than a faint trace of turbidity or insoluble matter should remain. Reserve the solution for the test for visual transition interval.
Visual Transition Interval. Dissolve 1.0 g of potassium chloride in 100 mL of water. Adjust the pH of the solution to 8.0 with 0.01 N acid or base. Add 0.15 mL of the 1% solution reserved from the test for clarity of alcohol solution. The solution should be colorless. Titrate the solution with 0.01 N sodium hydroxide until the pH is 8.2 (using the pH meter). The solution should have a pale pink color. Continue the titration until the pH is 8.6 (using the pH meter). The solution should have a definite pink color. Not more than 0.20 mL of 0.01 N sodium hydroxide should be consumed. Each additional 0.20 mL of 0.01 N sodium hydroxide should increase the amount of red color, until at pH 10 the solution should be very red.
We also supply Phenolphthalein BP Ph Eur JP IP EP Grade.
Please visit SDS Safety Data Sheet of Phenolphthalein Suppliers.
American Molecules, also known as ammol.org is a distributor, supplier and manufacturers' representative of all types of Pharmaceuticals, Functional Ingredients, Excipients and Specialty Chemicals in Texas USA. Our principals manufacture supply and export USP NF BP, Ph Eur, etc grades of chemicals pure and reagent grade, mineral fortifiers, FCC food grade. Tailor made particle size and customized specifications are offered. The principal's facility is having one or more of the certifications like FDA approval and GLP, cGMP, ISO9001, ISO14001, ISO/IEC 17025, ISO22000, FSSC 22000, ISO45001, FSSAI, Kosher, HALAL, COPP, WHO-GMP certified and Written Confirmation (WC) for export to Europe is available. The manufacturers suppliers and exporters observe WHO Good Manufacturing Practices and Good Laboratory Practices.
Suppliers and Manufacturers' Representative:
9910 Bent Oak Dr
Houston, TX 77040, USA
Call Toll Free: 1-855-55-AMMOL 1-855-552-6665
Email: info@ammol.org