This description of Toyota "pink" from Toyota:
"Genuine Toyota Super Long-Life Antifreeze/Coolant
Genuine Toyota Super Long-Life Antifreeze/Coolant is the same high quality, factory-fill product found in new Toyotas. You'll know it by its distinctive pink color. It provides maximum protection and durability without the use of harmful silicates. And because it's compatible with non-metallic materials, it helps extend the life of water-pump seals. Don't trust your engine to anything less than the best: Genuine Toyota Super Long-Life Antifreeze/Coolant."
The current wisdom is that this is an OAT/phosphate hybrid corrosion protection chemistry which is also true of Honda and Nissan antifreeze/coolants. Quite a few Toyota owners have also posted excellent results with Zerex G-05 in their cars' cooling systems. G-05 uses reduced silicate content in lieu phosphates for its hybrid formula. G-05 is factory-fill in all Mercedes-Benz (for over two decades - automotive and commercial), Mopar, and Ford passenger cars and light truck. Contrary to Toyota's assertion of the "harmful" effects of silicates, silicates work well and remain stable in solution as long as they're not used in the previously obscene concentrations of the traditional "green-snot-o'-death" antifreeze formulas common over a decade ago.