[ChildOfThe60s]

Oops, I always transpose the initials

It is Sodium Tripolyphosphate STPP

The polyphosphates are not damaging to the environment - it is the mono. Even though the enviro weenies got it taken out of the retail laundry soap and dishwasher soap, it is still in commercial products. Because they need their stuff clean and without STPP things don’t get as clean.

Amazon: (I use one 5lb about every 3 months)
https://www.amazon.com/dp/B091579GHX?smid=A2SMBD9PX0P7DB&ref_=chk_typ_imgToDp

Soap goods:
https://www.soapgoods.com/sodium-tripolyphosphate-light-density-stpp-p-1267.html

I use 2-3 tablespoons in each load of laundry and 1/2 teaspoon with my dish powder. Really noticeable with the dishes.

[blackdog]

I was so excited and thrilled to find Fels Naptha Soap on Amazon. Unfortunately I discovered it ain’t Fels Naptha Soap. It’s more like Fels Ainta Soap. Prop 65 in California ruined the product and brand. Napthalene is banned in California, so must the rest of America suffer.

[blackdog]

I also discovered Prop 65 killed off Cashmere Bouquet Bath Soap, Cremora Coffee Creamer, the MGB, Triumph Cars, tin plating, Agree Shampoo, and any useful manufacting process.

California is where good products go to die. Then because California is America's largest market, the product is abandoned.