Okay kiddo, let me explain phosphinate in a way that you can understand.
First, let's talk about phosphorus. Do you remember learning about the periodic table? Phosphorus is an element with the symbol P, and it can be found in things like bones, DNA, and even some types of explosives!
Now, when we add -inate to the end of the word phosphorus, it means we're talking about a compound made by combining phosphorus with other elements. In the case of phosphinate, it means that we're talking about a compound where phosphorus is combined with oxygen and something else, like hydrogen or a metal.
Phosphinates are used in many different ways, including as flame retardants, and in some types of herbicides and pesticides. They can also be used in medicine to treat certain medical conditions.
So in short, phosphinate is a type of compound made by adding oxygen and another element to phosphorus. It has many uses in different industries, and can even be used to help people feel better!