PHENOLPHTHALEIN- ▸ pH indication: acid-base indicator for the pH 8.2 to 9.8 range
- ▸ Titration: endpoint indicator for acid-base titrations
- ▸ Analytical reagent: laboratory reagent for analytical chemistry
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Phenolphthalein (CAS 77-09-8) is a phthalein compound supplied as a white-to-pale powder. It is used as an acid-base (pH) indicator over the approximate range 8.2 to 9.8 and as a laboratory and analytical reagent, turning colorless to pink across that transition.
Frequently Asked Questions
What is phenolphthalein USP ACS powder used for?
Phenolphthalein (CAS 77-09-8) is a phthalein compound supplied as a white-to-pale powder. It is used as an acid-base (pH) indicator over the approximate range 8.2 to 9.8 and as an endpoint indicator in acid-base titrations and other analytical chemistry work.
What color change does phenolphthalein show?
Phenolphthalein is colorless under acidic conditions and turns pink across its transition range of approximately pH 8.2 to 9.8. This makes it a common endpoint indicator for acid-base titrations.
What is the chemical formula of phenolphthalein?
Phenolphthalein has the molecular formula C20H14O4, CAS 77-09-8, and is supplied here as USP/ACS-grade white-to-pale powder. The USP ACS designation indicates it meets those compendial/reagent grade conventions for analytical use.
How is phenolphthalein powder shipped?
Phenolphthalein carries HS code 2932.20 and is referenced under UN 1993 for transport classification purposes. Contact RawSource for available packaging and the SDS to confirm compliant shipping of the powder to your destination.
What is the cost of bulk phenolphthalein USP ACS powder?
Pricing depends on grade, purity, and quantity. Request a bulk quote with your required volume rather than relying on a list price, and we will return current pricing along with the CoA and SDS.