Products having a pH of 5 or above would usually fall into this category. Normally, pharmaceutical products having a cream base, as well as some ointments, require these protective coating Example would include some topicals, steroidal creams, and haemorrhoidal products.
Many pharmaceutical products are compatible with high purity aluminium. Products with a petroleum base often do not require an internal barrier coating, and will be stable and maintain efficacy in an unlined aluminium tube. |