Sodium Citrate

[George K]

https://en.wikipedia.org/wiki/Trisodium_citrate

Na3C6H5O7

"It is found in gelatin mix, ice cream, yogurt, jams, sweets, milk powder, processed cheeses, carbonated beverages, and wine, amongst others.

Sodium citrate can be used as an emulsifying stabilizer when making cheese. It allows the cheese to melt without becoming greasy by stopping the fats from separating."

Sodium Citrate is the secret ingredient to make any cheese into smooth, creamy nacho cheese sauce

Coincidentally, Sodium Citrate's chemical formula is Na₃C₆H₅O₇

[Renauda]

According to the Wiki entry it is also used to descale boilers and car radiators.

Versatile,eh? The magic of chemistry.