No. You will need to continue using your usual detergent. Vanish products have been formulated for use alongside your detergent not to replace it.
Always follow the washing instructions on your garments. Vanish Napisan Oxi Action Inwash Liquid Gel is safe to use in the wash for machine washable silk and wool.
It is safe to use Vanish on your clothes without fading colours. If however you have any doubts about using Vanish on any of your garments always test a small area first.
Vanish Napisan & Vanish Preen are suitable to use at all temperatures, even a cold wash.
The Vanish Oxi Action Crystal White range is designed to help prevent this and has whitening agents to keep your whites crystal white!