There aren't really specific laws to prevent the use of carbide. The Food Adultration Act just prohibits its use within a 3 year imprisonment and a meager 1000 rupee fine if rules are flouted. There's limited availability of it in the Indian markets as it only goes into stuff like polymers, adhesives or detergents. Add to that weak regulations and you'll be clear about why masala is preferred over ethylene.
In today’s episode for 21st March 2023, we discuss calcium carbide as a commercial yet unethical fruit ripener and why fruit traders and vendors love it so much.