Pinkwashing is a term coined by Breast cancer Action that refers to companies selling pink products to boost profits without donating money to a breast cancer charity or having limited transparency of where the funds are directed.
Sociology is the study of society, breast cancer is a disease not a social phenomenon. You could turn Pinkwashing into a sociology topic - Painwashing is when companies use breast cancer cause to sell products, often very little money goes to the cause but it significantly increases their profits, and often they will use cancer-causing ingredients in the products they're selling. Pinkwashing is interesting from a sociological perspective because people are more aware of pink than of breast cancer, companies use pink as a marketing tool and often take about breasts but not people behind the breasts. There's an element of herd mentality and brainwashing involved.