Why the form is used
Removing water can reduce some degradation processes. The result still depends on the material, formulation, residual moisture, container and handling.
Appearance is not an assay
The dry material is sometimes called a cake. Its appearance alone does not establish identity, content, purity or suitability. Raise unexpected changes with the supplier.
Follow specific conditions
Use the product's supported storage and laboratory-handling information. Do not extrapolate one compound's stability or shipping conditions to another. Products are not for human or clinical use.