noun
laundry soap; detergent
Refers specifically to soap or detergent used for washing clothes, as opposed to body soap or dish soap.
洗濯石鹸が切れたので買いに行かなくては。
We're out of laundry soap, so I have to go buy some.
この洗濯石鹸
This laundry detergent is made with environmentally friendly ingredients.