Piroctone olamine is commonly known as OCT, a new type of anti-dandruff agent. It has good effect, much lower irritation than ZPT, and its price is several times higher than ZPT. Therefore, it can be seen in some anti-dandruff products with high positioning. L'Oreal's anti-dandruff products are relatively more common. Some. There are even many acne products that use OCT as a fungicide.