Can I use trisodium phosphate for killing weeds?

Now that I have got myself a bag of TSP aka trisodium phosphate. The big question is how do I put it to use? Should I put it on weed like we do for salt or shall it have a totally opposite effect making them grow even bigger and faster as plants like phosphorus due to it being a plant nutrient? What’s the best use of TSP if it can’t be used to get rid of weeds?