Among the substances of which he investigated the composition were ammonia, sulphuretted hydrogen and prussic acid, and his experiments on chlorine, which he regarded, not as an element, but as oxygenated muriatic (oxymuriatic) acid, led him to propose it as a bleaching agent in 1785.
In extreme cases, a non-toxic bleaching agent can be employed to restore the whiteness of rug fringes.
Your gums are coated with a protective gel and teeth with a bleaching agent.
Teeth bleaching is the process of using a chemical bleaching agent to whiten teeth.
The bleaching agent is placed in a tray which is fitted over the teeth.
