Quick Answer: Red Litmus Indicator Paper is a strip-format indicator for spotting bases: the paper turns from red to blue in an alkaline solution. It gives a qualitative result only, not a pH value.
Last updated: October 2026
Key Features
Turns from red to blue when wetted with an alkaline solution
Strip format for dipping or spotting with a drop of sample
Quick qualitative acid-base test with no instrument needed
Not intended for quantitative pH measurement
Technical Specifications
Specification
Value
Type
Laboratory indicator paper
Colour change
Red to blue in alkaline solution
Test type
Qualitative
Storage
Cool, dry place away from moisture and direct sunlight
About This Product
Red litmus is the usual first check for whether an unknown solution is basic. A strip is dipped briefly in the sample, or touched with a drop from a clean dropper or glass rod, and read straight away; no change means the sample is not alkaline under the test conditions. It is used in school and college chemistry practicals and as a preliminary test before measuring pH properly. The Red Litmus Indicator Paper can be supplied on export terms to Antigua and Barbuda, Sierra Leone, Montenegro, United States and Jordan.
Frequently Asked Questions
Can Red Litmus Indicator Paper give an exact pH value?
No. It only shows whether a solution is alkaline, by turning from red to blue. Use it as a preliminary qualitative test.
How should the paper be stored?
Keep the pack closed in a cool, dry place, away from moisture and direct sunlight.
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