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Blue Litmus Paper
Blue Litmus Paper (Product Code: SLE/CH/79) is a vial of easy-to-use indicator strips that turn red when dipped into an acidic solution. Students in their first acids-and-bases unit use it to confirm that vinegar, lemon juice or a dilute mineral acid really is acidic, and laboratory staff keep it on hand as a fast pH indicator paper for spotting acid spills and residues. Each vial holds 100 strips, supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala.
Specifications
| Parameter | Detail |
|---|---|
| Type | Blue litmus test strips |
| Indication | Turns red in acidic solutions |
| Quantity | 100 strips per vial |
| Ease of use | Dip-and-read, no preparation |
| Intended for | Introductory chemistry lessons on acids and bases |
Typical Use
A common starter practical gives each group a tray of household and laboratory liquids and asks them to find the acids. A strip that turns red identifies an acid; a strip that stays blue tells students the sample is neutral or basic, and a second test with red litmus separates those two. Moistened blue litmus also responds to acidic gases, so it is used during gas tests in qualitative analysis, for example over a test tube releasing hydrogen chloride.
Place a strip on a white tile and add the sample with a clean dropper or glass rod rather than dipping the whole strip into a stock bottle, which avoids contaminating reagents. Store vials capped and well away from acid bottles, as acidic fumes in a busy lab can redden strips before they are used. For a class set, a single vial can be shared between several groups by cutting strips into shorter pieces.
Supplier
Blue Litmus Paper is supplied by Jain Scientific Equipments Private Limited under its trading name ScienceLab. The company is based in Ambala, Haryana, India, and equips school and college laboratories; more is on our company profile.
Related Chemistry Lab Equipment
Pair these with blue litmus when setting up an acid identification practical:
- Red Litmus Paper — completes the test by identifying bases
- Paper, Universal — for estimating how acidic a sample is
- Blue Litmus Solution — the liquid indicator form for test-tube work
- Dropper Bottle, Clear — dispenses samples a drop at a time
- Test Tube Racks — keeps labelled sample tubes upright during testing
Explore more indicators and glassware in Chemistry Lab Equipment.
Frequently Asked Questions
What colour change shows an acid?
The strip turns from blue to red when the sample is acidic.
What if the strip does not change colour?
The sample is neutral or basic. Test it with red litmus paper, which turns blue for bases.
How many strips does a vial contain?
100 strips per vial.
Is blue litmus paper enough to measure pH?
No, it only tells you whether a sample is acidic. Universal indicator paper gives an approximate pH value.
Why have some strips turned red in the vial?
They have been exposed to acidic fumes or moisture. Keep the vial closed and stored away from acids.
What should an institutional enquiry include?
The number of vials, whether you also need red litmus or universal paper, and your delivery location in India or overseas. Send it via our contact page.
Request a Quote
For Blue Litmus Paper pricing, get in touch or add the vials to your enquiry cart and submit them with the rest of your order.
Last updated: 24 September 2026
