Straight bleach is around 8% hypochlorite so 2.5% is about a third of that. Yes, very strong and caustic too. pH 11-12! It will smell strongly of bleach and can oxidize metals given enough time with poor ventilation.
In the US, sanitary water is known as “gray water.”
Here in Brazil this product has 2.5% active chlorine and my family use it every day in bathroom cleaning for a few minutes the bottle is open so I thought this is volatile evaporates it spreads through the house and goes down depositing on metals, appliances electronics and DVD discs causing them to corrode?