What special requirements apply to warehouses used by wholesalers of Chinese herbal medicines to prevent dampness, mould and infestation?

Because of their natural plant or animal origins, Chinese herbal medicines are more sensitive than chemical medicines to humidity and pests in storage and therefore require more specific and stringent protection against damp, mould and infestation. First, **humidity control** is paramount. The warehouse must be equipped with powerful dehumidifiers and humidity must be monitored continuously to ensure that relative humidity is kept at a low level (typically, 45%-65% is recommended, depending on the type of Chinese herbal medicine). Second, **temperature control** is also important. High temperatures and humidity provide ideal conditions for mould and pests, so good ventilation and air-conditioning systems are also needed. Third, **regular inspections**. A frequent stock inspection plan must be established and implemented, with the Chinese herbal medicines turned and checked regularly, particularly those prone to infestation or mould, for mould, insect damage, discolouration or unusual odours. Fourth, **physical segregation**. Different batches of Chinese herbal medicines, those likely to transfer odours (such as mint and sandalwood), and those prone to infestation (such as angelica and goji berries) should be stored separately. All Chinese herbal medicines must be stored off the floor and away from walls to allow ventilation.