A specification sheet looks technical and is often treated as something to accept as given. It is worth reading properly, because it defines the product your laboratory will test against and the standard your regulator will judge it by.
Description
The first section states what the product is and what form it takes — a powder, a solution, a tablet, a capsule fill. For a supplier, this section also carries the presentation details that matter commercially: pack sizes and configurations. If a pack size you require is not listed, ask whether it is available or would need registration as a variation.
Identification tests
These confirm the material is what it claims to be. Colour reaction, melting point, retention time on chromatography and spectroscopic comparison are all common approaches. A specification typically lists several, because no single test is sufficient on its own.
Assay and related substance limits
Assay states the permitted range of active ingredient content. Related substances limits address individual impurities and, where relevant, a total impurities figure. For a beta-lactam such as a penicillin or cephalosporin, impurity control is particularly exacting, and the limits in the registered specification should be read carefully.
pH, moisture, physical appearance
Smaller but not trivial. pH affects stability for many parenteral products; water content relates to hygroscopicity and to the storage conditions the product needs. Physical appearance standards also serve as a simple first-line check on batch integrity.
Bacterial endotoxins and sterility
For parenteral products, these are defining requirements. The limits and the methods used to demonstrate them are part of the registered specification, and compliance is verified per batch through the Certificate of Analysis.
Storage conditions and shelf life
Often overlooked. Storage conditions specify temperature and, where relevant, protection from light. Shelf life is defined against those conditions. If your distribution route involves transit through a hot climate, it is worth confirming with the manufacturer what the available margin is.
What to ask when something is unclear
If a limit or method is not stated, ask rather than assume. A manufacturer supplying from an established registration will usually answer directly, and where something genuinely differs from a generic expectation, knowing early is far better than discovering it at customs.
This article is a general guide to reading specifications and is not regulatory, technical or legal advice for any specific product. Always work from the registered specification and confirm requirements with your authority.
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