Chlorophenol Red 8x10" Paper

SKU: 33813-CR8

$2.95USD or lower Each

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[5]   3 Reviews    | Write a Review

Chlorophenol red detection paper dramaticallly indicates the presence of water with a bright red color; only $2.95 for one; quantity discounts. Not recommended for water that is below pH 5.5

Chlorophenol red sheets available in large format 24x20" (600x500mm). Mininum is a pack of 100 sheets. Other custom sizes also available, MOQ applies.

Cobalt Chloride Leak Detection Paper reacts at relative humidities above 55% so can detect water vapor as well as liquid water. Universal pH Water Leak Detection Paper also provides a permanent record and can indicate pH at the same time.

You can also see our blog about leak detection.

Click on the Details tab below for more information on this type of moisture test sheet & a view of use with spot plate leak detection.


The water indicator paper sheets shown in the image are 8x10" (200x250mm). The native color of the sheets is yellow & the wetted sections turn red when exposed to liquid water. They are insensitive even to high humidity levels unlike the cobalt chloride papers.

Note: Chlorophenol red does NOT change color if the water is below pH 5.5. If you require a permanent record of water leakage at pH levels below this, we recommend the universal pH water indicator paper.

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

Test Strip Documentation

Stability Statement Certificate of Analysis
Reviews (3)
Fast shipping and working well to identify water leaks.
— Lisa
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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