Very Wrong practice with labour violating ohsas rule

Sir, One of the top rated company of india in its segment is vioalting rule regarding health of labour. Complete Scenario I am also an employee of this company as its latest unit is using hazardous waste as a fuel and to smooth operation of this hazardous waste company outsourced contract labour and the condition of those labour are very merciful i myself feel the way their contractor treating these labour is very inhuman they were continuously working in that area and i bet normal person cannot withstand 10 minutes standing their the smell will make u headache. But they were forced to do so. I talked to them and they say pet aur parivaar ke liye krna pdta hai .....i talked to manager of that section to make arrangements for them to atleast take some rest in gap but he refused and the whole management is just cheering with the savings of crore they make, but noone was thinking about those labour. I wanted to complain against this in labour ministry public grievance but they ask each every info about me that i cant share, may risk my job if management comes to know that complain was done by me. So what you suggest ? Or is there any way to anonymously file complain against this kind of act.