Why organics products reaction is classified dangerous in which case they are really dangerous?

the organic product are acid ph between 1 to 3, the volatil product are dangerous .

All the chemical are hazardus to environment, make sure how we use it and it should be quenched properly. It should not harm to nature.

AS A STUDY IT IS NOT HARMFUL BUT IN LAB IT IS EFFECT THE ENVIRONMENT 

produce an organic products which effect the enviroment and corrosive to the human central nervous system 

becauce the organic reactions produce an organic products which effect the enviroment and corrosive to the human central nervous system and respiretory system

Beaucause we use a dangerous products like strong acids or bases also a very corrosive products that affects the respiratory system, so it's really dangerous