This element was named after a cleaning compound which was found to contain large quantities of it

Answer :

Plutonium (named when Pluto, having been discovered directly when neptunium)

and Mercury (associated with the earth Mercury)

As to the cleansing compound, I'm simply guessing:

Hydrogen, as in oxide

OR

Phosphorus, utilized in detergents.

OR

Nitrogen, found in ammonia.

OR

Chlorine may be a powerful oxidizer and is employed in bleaching and disinfectants and Borax

Explanation:

If we just think about Borax then we can say about it:

Softens laborious Water: H2O prevents detergent from operating like it's imagined to. This keeps your garments from kicking off as clean as they must, and is usually the cause for grey, dingy trying covering. Since mineral contains Na, it helps to melt the wash water, thus your garments begin trying nice