Chlorophenol Red Water pH 6

SKU: 33813-CR8

$2.95USD or lower Each

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[5]   4 Reviews    | Write a Review

Chlorophenol red detection paper is pH sensitive & in this image shows good contrast when the pH is 6. See other images below to compare results at different pH levels.

Cobalt Chloride Leak Detection Paper is not pH sensitive & Universal pH Water Leak Detection Paper will show both the presence of water and indicate pH at the same time.

See our blog Find Water Leaks Fast.


This chlorophenol red water contact indicator paper can be used as a high contrast water leak locator in boats, roofs, cars or appliances.

Related information or images
  • Sheet dimension is 200x250mm or 8x10"; custom sizes available
  • Will not react with water below pH5.5 (only weak acids or alkali)
  • Reaction is irreversible

Reviews (4)

I bought these for the purpose of locating hard to observe, intermittent water leaks. By strategically placing small sections of the paper in various places, I was able to monitor on a schedule rather than guessing when the leaks might happen. Now the leaks are fixed and I can monitor periodically for signs of new problems.

— Sal
— Indigo:

Great news & thanks for letting us know. For those who want to know a little bit more, check out: Find Water Leaks Fast: Cars, Boats, Roofs, Plumbing


Fast shipping and working well to identify water leaks.

— Lisa
— Indigo:

Glad it worked. This may help others better understand the different leak detection sheets, check out: Find Water Leaks Fast: Cars, Boats, Roofs, Plumbing


This water detection paper worked well in identifying moisture intrusion during testing and was easily observable due to its high color contrast.

— Richard
Used this to detect where a leak was. Worked great!
— Doug
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