sunscreens are a minefield. Do not judge by organic/non organic
I think you'll find that even 'organic' ones contain chemical active ingredients which absorb the sun's rays. This absorption breaks down the chemicals and there is much debate as to whether these ingredients or their metabolites (what they get turned into when exposed to sun) can cause harm as they are absorbed into the skin
I always go for a purely mineral sunscreen and look out for either zinc oxide or titanium dioxide. These mineral sunscreen are photostable (won't break down), will not be absorbed by the body and reflect the sun's rays
They are the safest whether you buy them as organic products or not
I get Lavera (they happen to be organic)