Hypochlorite salts can also serve as chlorinating agents. The principal example is tert-butyl hypochlorite, which is a useful chlorinating agent. However, properly cooking chicken, pasteurizing milk, and chlorinating drinking water kill the bacteria. Conventional one-pot chlorinating agents, e.g. thionyl chloride, phosphorus trichloride, are ineffective. As a reagent for organic chemistry, it is used as an oxidant and chlorinating agent. A typical chlorinating agent is phosphoryl chloride. The imidoyl chloride is the active chlorinating agent. It is a strong oxidiser and chlorinating agent. Triphenylphosphine dichloride, PhPCl, is a chlorinating agent widely used in organic chemistry. PCl finds use as a chlorinating reagent. Chloromethane is employed as a methylating and chlorinating agent, e.g. the production of methylcellulose. Dichlorine monoxide is an effective chlorinating agent. By chlorinating this by-product, persistent and potent insecticides were easily and cheaply produced. These included an ozone plant, rapid pressure filters, a chlorinating plant and an ammoniating plant.