Litmus Paper Blue
Product Code : JL-LE-11085
Litmus Paper Blue (SKU JL-LE-11085, Model No. JL989/028) is paper impregnated with litmus indicator, supplied by JaincoLab in a plastic vial of about 100 strips. Blue litmus paper is the quick test for an acid: it turns red or pink in an acidic solution below pH 4.5. Schools use it from the first lessons on acids and bases through to college practicals where a fast check of a solution or a gas is needed before a titration or preparation.
Specifications
The listing states how the blue paper responds across the pH range and how it is packed:
| Product | Litmus Paper Blue |
| SKU | JL-LE-11085 |
| Model No. | JL989/028 |
| Indicator | Litmus |
| Colour of paper | Blue |
| Below pH 4.5 | Turns red or pink |
| pH 4.5 to 8.3 | Purple |
| Above pH 8.3 | Stays blue |
| Packing | Plastic vial, about 100 paper strips per vial |
Uses of blue litmus paper
Typical tests in school and college laboratories:
- Identifying acids such as dilute hydrochloric acid, vinegar or lemon juice, which turn the strip red
- Testing acidic gases: a moist strip held at the mouth of a test tube turns red with carbon dioxide or hydrogen chloride
- Used alongside red litmus paper to sort solutions into acidic, neutral and alkaline
- Checking the product of a reaction, for example that a non-metal oxide dissolved in water is acidic
Scope of supply and ordering
Each vial holds about 100 strips; the number of vials, packing and dispatch time are confirmed on the quotation.
Frequently asked questions
At what pH does blue litmus paper turn red?
Below about pH 4.5. Between pH 4.5 and 8.3 it looks purple, and above 8.3 it stays blue.
How many strips are in a vial?
About 100 paper strips in each plastic vial.
Can blue litmus paper detect an alkali?
No. It stays blue in alkaline solutions; red litmus paper is used to detect alkalis.
Related products
Other indicators are listed in our laboratory equipment range.
Request a quote
To order blue litmus paper by the vial, send your quantity through the contact page. Tender and project enquiries can be sent through the tenders page.
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