No. Trisodium phosphate is Na3PO4, but tripotassium phosphate is K3PO4. Potassium (K+) is not the same thing as sodium (Na+), even though both are attached to a phosphate (PO43-) in this example.
Trisodium phosphate (TSP), available at most hardware stores in white powder form, is a cleaning agent, stain remover and degreaser, commonly used to prepare surfaces for painting. It can also be...
Accord is a combination of sodium and potassium phosphate (per the package I have in front of me). Its useful as a binder in emulsified meat products to help them retain water.
It is a strong base and should be used very carefully. It is the same phosphate used in detergents. Not environmentally friendly, but not in the same category as crude oil.