Litmus
| Also Known As | Litmus indicator, litmus paper, litmus solution, azolitmin (main active component) |
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What is Litmus?
A natural acid-base indicator derived from lichens that turns red in acidic conditions and blue in basic conditions. Litmus paper (red and blue) is widely used for quick pH testing. While imprecise compared to pH meters, it remains a useful qualitative tool.
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A natural acid-base indicator derived from lichens that turns red in acidic conditions and blue in basic conditions. Litmus paper (red and blue) is widely used for quick pH testing. While imprecise compared to pH meters, it remains a useful qualitative tool.
Litmus is used in: educational demonstrations of acid-base chemistry, qualitative testing of solutions (acid, base, or neutral), testing of gases (moistened litmus paper turns red with HCl, blue with NH₃), and as a historical reagent in qualitative analysis.
Litmus solution is essentially non-toxic (from natural lichen source). The solutions used to prepare litmus paper may contain dilute acid or base. No specific hazard beyond standard laboratory chemical handling.