Frey Scientific Litmus Test Paper - Pack of 12 Vials - 100 Strips per Vial - Blue
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- The strip has a fast response time, and will change color in just seconds
- The blue Litmus paper will turn red if the solution is an acid, and will remain unchanged if not
- The pH test strips and papers are based on acid basic indicators, which change their colors in a particular pH range
- 100 strips per vial