Ammonia Leak Detection Strips

SKU: 33810-Phe

$2.95USD or lower Each

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Phenolphthalein test papers are inexpensive ammonia gas leak indicators. Ammonia changes phenolphthalein paper from white to pink at pH 11.6. Only $2.95 for 100 strips.

Find ammonia gas leaks by wetting one end of the test paper with water and then holding it near the suspected leak. If the color change is immediate, get a protective mask with an air supply.

If you need a supersensitive detector for gloveboxes, click on ammonia leak detector cloth. Or, if you need a semiquantitative measurement for use in bioreactors or waste management, click on 0-100ppm ammonia test strips.

 

Details

How Does Phenolphthalein Indicator Work?

Phenolphthalein is itself a weak acid and colorless when dissolved in distilled water. When a basic (alkaline) compound such as ammonia is added, the increase in pH alters its chemical structure and changes the color of the solution to pink/fuchsia. This is a simple test for ammonia gas using litmus paper.

monia has uses as a refrigerant & for leak detection techniques but it is also used in water treatment. Some municipalities use it to react with chlorine to produce choramines. These have a lower overall disinfection strength but last much longer.

What is the pH level of ammonia?

Phenolphthalein strips can detect ammonia in air since its pH of 11.6 turns phenolphthalein a pink/fuchsia color. The test strip has to be wetted first so the ammonia gas can dissolve onto the wet strip. This test for ammonia gas using litmus paper is strictly qualitative, i.e. yes or no.

Related information or images
Specifications
  • The number of strips per pack or vial is approximate.
  • Shelf life is at least 2 years if kept properly sealed after opening; 5 years is typical.
  • Available in larger sheets, 8x10" (200x250mm), by special order.

Test Strip Documentation

Stability Statement Certificate of Analysis
Reviews (2)
2020-06-03
Product was received quickly after order. Works just as advertised. An easy method to look for small ammonia leaks.
— Deep River Curling Club
2018-09-13
Fast service! Ordered and shipped on same day. Shipped on Thursday, received in rural NL on Monday. Product as described.
— DN
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