No way to test the percentage of chlorine in jugs but has only a faint smell of chlorine and is a very very pale yellow. Normally the smell of chlorine is strong when you open the jug and is very yellow in color.
Put 6 jugs in my pool due to it being very green because my pump was broke for a week, Pump repaired and I have put 6 jugs in so far and has been running for 3 hours and it has not even started to turn color.
I believe they are selling deluted chlorine.