A method-specific result
A reported purity percentage is tied to a sample and analytical method. It should not be treated as a universal description of every possible impurity or quality attribute.
What it does not prove
Purity alone does not establish identity, exact net content, sterility, endotoxin status, stability, or suitability for human or veterinary use.
Read the entire report
Consider the chromatogram, method, sample identifier, date, laboratory, acceptance criteria, and any notes or deviations rather than focusing on one percentage.