it is a high pH, but you only need 1/2-1oz per gallon. Does a fantastic job! Even on resty carpets.
O2 works great for when you don't need that extra punch.
EXCELLENT high Ph oxidizing prespray.
Although many will say it has no odor, I think it resembles the typical "Fresh-n-Clean" type fragrance found in laundry detergents and deodorants.