Litmus paper red:
Changes colour from red to blue when conditions change from acidic to alkaline.
Recommended application:
General test for acidic or alkaline reaction: It serves in neutralisation reactions to check whether the change from acid to alkaline or vice versa has taken place. Litmus paper is the bestknown indicator paper.
Presentation
Reel of 5m length and 7mm width
Color reaction: red ->blue
PH range: 5.0 - 8.0