Red Litmus Paper
Product Code : SCL-CL-11607
Red Litmus Paper (SKU SCL-CL-11607) is an indicator paper for detecting bases: an alkaline solution turns it blue, while acids leave it red. It suits first acid-base lessons in school science and quick bench tests in college chemistry. From Ambala, India, Science Lab Supplies can send the paper in class or bulk quantities to schools, colleges, polytechnics, tender contractors and distributors.
Specifications
Red litmus paper's reactions with bases and acids are tabulated below. In short, the paper turns blue when dipped in a base and shows no change in an acid, staying red; paired with blue litmus paper, it lets students sort a solution into acidic, basic or neutral within seconds.
| Specification | Value |
|---|---|
| SKU | SCL-CL-11607 |
| Type | Indicator test paper (red litmus) |
| With bases | Turns blue |
| With acids | Stays red (no change) |
| Shelf life | Depends on storage; batch expiry given on request |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for Red Litmus Paper
Red litmus is the standard first test for alkalis such as lime water, soap solution or ammonia. It appears in NCERT Class 7 and Class 10 acid-base activities and in Class 11–12 salt analysis, where moist paper held at the mouth of a test tube detects an alkaline gas.
- NCERT Class 7 science: finding the bases among household solutions.
- NCERT Class 10 science: testing sodium hydroxide solution, and the ash left after burning Magnesium (Bar) in air once it is dissolved in water.
- Class 12 salt analysis: confirming ammonia gas with moist red litmus while the warm tube is held in a Test Tube Clamp.
- General chemistry labs: checking that alkaline waste or rinse water has been neutralised.
Standard Scope of Supply
Red Litmus Paper is supplied as indicator test paper as described above, with the pack form and number of strips per pack given on the quotation. Shelf life depends on the chemical, its grade and storage conditions; ask us for the expiry date of the batch you are quoted.
Packing, MOQ and Lead Time
Ask for a quotation for a single pack or for enough paper to stock every practical room in a school. The quotation shows packing, delivery time and price for that quantity, and blue litmus or other chemistry lab equipment in India can be added to it.
Holding an Importer-Exporter Code, Science Lab Supplies as a registered exporter can ship to buyers in Rwanda, South Africa, Qatar, Sri Lanka, Vietnam and Malaysia. Prices for a pack or a bulk lot come back through the contact page or the enquiry cart, and the lab tender page sets out how tender quotations are handled.
Frequently Asked Questions
What does red litmus paper detect?
It detects bases. The paper turns blue in an alkaline solution, while in an acid it stays red, so it is the quickest way to confirm that a liquid is basic.
Why does red litmus stay red in some solutions?
Acids cause no change, and neutral substances such as pure water do not change it either. Test with blue litmus as well to tell an acid from a neutral liquid.
Who supplies Red Litmus Paper?
Red litmus paper is quoted from Ambala, India, by Science Lab Supplies, either alone or as part of a wider order of indicators, glassware and acid-base apparatus for a school or college laboratory.
Can red litmus paper be used to test gases?
Yes. Moisten a strip and hold it at the mouth of the test tube; an alkaline gas such as ammonia turns it blue. Carry out such tests under teacher supervision.
Related Acid-Base Testing Supplies
These items round out acid-base testing with red litmus: the blue paper for acids, universal indicator and a litmus solution, an assortment of test papers, a salt hydrolysis kit, a wall chart on acidic and basic solutions and a dropper bottle for test liquids. They can be quoted on one document.
- Blue Litmus Paper — the acid test: acids turn it red, bases leave it unchanged.
- Universal Ph Indicator — paper material giving pH values from 0 to 14.
- Red Litmus Solution — solution form of the red-to-blue indicator for basic samples.
- Test Paper Books — assortment with litmus, cobalt chloride, lead acetate and starch-iodide papers.
- Hydrolysis of Salts Kit — tests salt solutions for relative pH, with worksheets and teacher's guide.
- The Acid-Basic Environment of The Solution — 70 x 100 cm chart, wall mounted and laminated.
- Glass Bottle, with Dropper 60ml — 60 ml chemical-resistant glass bottle with a colourless dropper.
Browse the full Chemistry Lab range, the Lab Chemicals range for indicator solutions, or all school lab equipment.
Last updated: 9 October 2026
