STABILITY
DIFFICIL-S® was independently tested by University Hospital Birmingham NHS Trust Foundation Research Laboratories and found to still be producing at or above its target chlorine dioxide output for a 1:400 dilution of 300ppm after 30 months storage at 35° in the original sachets.
If DIFFICIL-S® is prepared at a 1:400 dilution in cold tap water and stored in a sealed container over a 10 day period, it maintains its chlorine dioxide content in solution and the efficacy is unchanged.
Stability of DIFFICIL-S® Sachets in Storage

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