unpopular opinion: most of what gets said here about Janoshik is guesswork
Thinking out loud about this: unpopular opinion: most of what gets said here about Janoshik is guesswork. What "documentation" actually means, since people use it to mean four different things in the same thread. A certificate of analysis is one document about one lot. A batch record is the manufacturing trail behind…
Lead time and minimum quantity are the two facts people forget to ask for and then argue about later. Both are answerable in one email before you commit.
Minimum order and lead time — did they quote both up front?
what does the certificate actually carry — that is the whole question
Which lane, and what was the quoted lead time at checkout?
Did you ask for the batch-specific certificate, or the generic one?
a claim with no batch number is a marketing document
Which service did the testing, and did you pay for it yourself?
registration number, then everything else
the lot on the vial has to match the lot on the certificate, every time
Yes. Spread across lots is the number that tells you about the process. A single high result tells you about a vial.
a directory entry is a record, not a recommendation
lead time quoted at checkout is the number to hold them to