LITMUS
- CAS NO.：1393-92-6
- Empirical Formula: n.a.
- Molecular Weight: 0
- MDL number: MFCD00131528
- EINECS: 215-739-6
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-07-16 09:55:33
What is LITMUS?
Chemical properties
blue powder
What are the applications of Application
Litmus is a pH indicator, also known as Lacmus, which is red at pH 4.5 and blue at pH 8.3
Definition
A natural pigment that changes color when in contact with acids and alkalis; above a pH of 8.3 it is blue and below a pH of 4.5 it is red. Thus it gives a rough indication of the acidity or basicity of a solution; because of its rather broad range of color change it is not used for precise work. Litmus is used both in solution and as litmus paper.
Definition
litmus: A water-soluble dye extractedfrom certain lichens. It turnsred under acid conditions and blueunder alkaline conditions, the colourchange occurring over the pH range4.5-8.3 (at 25°C). It is not suitable fortitrations because of the wide rangeover which the colour changes, but is used as a rough indicator of acidityor alkalinity, both in solution and aslitmus paper (absorbent paper soakedin litmus solution).
Properties of LITMUS
| Melting point: | 100 °C |
| form | Powder or Granules |
| color | Dark blue to bluish-black |
| Specific Gravity | 0.984 |
| PH Range | 4.5(red)-8.3(blue) |
| Odor | Odorless |
| Water Solubility | Soluble in water |
| Merck | 14,5547 |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
Safety information for LITMUS
Computed Descriptors for LITMUS
LITMUS manufacturer
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