Biopharm Phenolphthalein pH Indicator 1% w/v Solution, 250 mL (8.4 fl oz) Plus Filled 50 mL Dropper Bottle

Excellent sales service, the reagent meets all requirements. Thank you

I used this for a classroom activity to help show STD and how they can transmit from one person to one person. It worked great and was easy to use.

I recieved the chemical on time as expected. And more importantly it works perfectly. Maybe I shouldn't be too pessimistic, however the first bottle I purchased 2 years ago didn't work as expected. This bottles color is bright magenta when reacting. The bottles seam to seal well. My old bottle worked well for about a year, then evaporated to almost nothing in 2 months. Time will tell. I will update this in a year.

Yes, phenolphthalein is an odd choice, but I needed some for a science experiment. This arrived promptly and worked as expected. Happy with my purchase!

Worked well since the shipment from usual supplier would not have come in time

I have a YouTube channel called DIYscienceguy where I combine craft projects to teach science lessons. I have a craft using this solution to change the color of different liquids depending on their pH. This solution caused a fast reaction that WOW’s kids. Very effective.

As advertised

I purchased this for a school science demo. It worked exactly as it should.