Answer: whitener

AnswerCrossword Clue
WHITENERBleach
WHITENERDentist's recommendation
WHITENERTide component
WHITENERToothpaste ingredient
WHITENERBleach, for one
whitenerperson or thing that whitens
whitenera bleach
whitenerpreparation for making something white, as a bleach, dye, or polish
whitenerperson who applies whitener, as in a manufacturing process