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Lyophilized material is stable at minus 20 degrees Celsius and much less so once it warms. What happens in transit, and what to do in the first hour after a box arrives.

Identity, purity, endotoxin and heavy metals each come from a different method. We walk one real certificate line by line and show which section answers which question.

A 99% figure on a certificate is peak area at one wavelength on one column, not a statement about everything in the vial. Here is what the number covers and what it does not.