Just two other things from what I have read that could be mentioned.
If you have a larger amount, one quart, keep it in one of those dark collapsible photo chemical bottles.
As it is used, with the cap off, you push the bottle down to reduce air content, then screw the cap on.
In a sealed bottle, especially in the van where it gets hot, the peroxide will build up gas and force it's way out through the cap, sometimes even bursting a seal and leaking.
It does lose potency with heat, air, age and sunlight.
Sounds a bit like me I guess. shiteatinggrin
Fifty years ago, it used to be great for my hair, now, I ain't so sure. thathurts
Ooroo,
:roll: