10% hydrogen peroxide concentration test strips can be used to assess 35% food grade peroxide (after dilution), only $26.95 for 100 strips.
The lowest level this strip can test for is 1% which is equivalent to 10,000ppm. The upper limit, 10%, is the same as 100,000ppm. At that concentration, the strip turns black immediately. The 0-400ppm hydrogen peroxide test strip is much more useful for hot tubs, pools and spas.
Use our hydrogen peroxide sanitizer dilution calculator to get the right strength.
Click on the Tabs below for more information.
These 1-10% test strips are used with concentrated hydrogen peroxide, aka "food grade". They change to only one color, black with concentration indicated by the speed of the color change. This timed response differs from the other peroxide strips which use color charts. These have a "lag time" before any color change is observed and a completion time where the final color change is observed. See table below.
Note: The bracked numbers in the two columns for 1, 2, 3% are for contact lens solutions & are different due to additives based on CIBA Geigy AOSEPT. These will vary with other similar products.
|Concentration||Lag Time||Reaction Completion|
|7% (70,000ppm)||2 seconds||3|
|5% (50,000ppm)||5 seconds||10|
|3% (30,000ppm)||10 seconds (20)||15 seconds (30)|
|2% (20,000ppm)||15 seconds (~40)||30 seconds (~60)|
|1% (10,000ppm)||30 seconds (~75)||60 seconds (~120)|