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Define
Definitions for
"ORTHOTOLIDINE"
Keywords:
dpd
,
colorimetric
,
chlorine
,
reagent
,
spa
A chemical reagent used to test the total chlorine level in pool and spa water. It does not measure free available chlorine. See DPD.
backyardescape.com
Orthotolidine is a colorimetric indicator of chlorine residual.
wqa.org