Batch numbers and lab reports, for people who resell.

What a batch number is, and what it is not

A batch number is the code a manufacturer gives to one production run, so that every vial filled from that run can be identified as belonging to it. Lot number means the same thing. It is usually a short string of letters and digits printed on the vial label, sometimes with a compound prefix so it reads at a glance.

What it does is narrow and important. Two vials with the same batch number came out of the same run, under the same conditions, at the same time. Two vials of the same compound with different batch numbers did not, and nothing said about one of them automatically applies to the other.

What it is not is a quality mark. A batch number on its own proves nothing about what is in the vial. It is an address. A lab report, a complaint, a storage problem or a recall all attach to that address, and without it there is nowhere for any of them to attach. That is why a vial with no batch number is a problem even if the contents are perfectly fine: there is no way to show it.

Why the number has to stay matched from supplier to customer

The batch number is only useful if it survives every hand the vial passes through, because a single break in the chain makes everything after it unprovable.

Think about the questions that actually come up in this market. A customer in Cebu asks whether there is a report for the vial they bought from you. A customer in Quezon City says a vial looked wrong when it arrived. Your supplier tells you a run had a labelling issue and asks which customers received it. Every one of those questions is answered by a batch number and only by a batch number. If you can say which batch each customer received, they are five-minute questions. If you cannot, they are arguments.

The common ways the chain breaks are mundane. A reseller repacks vials into their own bags without noting the batch. Stock from two deliveries gets mixed on one fridge shelf. A label is covered by a sticker. A customer is sent a photo of a report for a different batch because it was the one on file. None of these is dishonest, and every one of them destroys the link between the report and the vial.

The rule that prevents all of it is simple: never remove, cover or replace the supplier's batch number, and never sell a vial without writing down which batch it was. If you add your own label, put it somewhere that leaves the original batch number readable.

How a reseller records batches per sale

Record the batch at the moment of sale, in one place, with enough detail that you could find every customer who received a given batch in under a minute. A shared spreadsheet is enough. So is a notebook, if it is the only notebook. What matters is that it is one record, not a mix of chat threads and memory.

A record that does the job has these columns:

• Date received and supplier order reference

  When the stock arrived and which supplier order it came in on. This is what lets you go back to your supplier with a specific question instead of a general one.

• Compound, vial size and batch number

  Copied from the vial label exactly as printed, including any prefix. Do not abbreviate it; a batch number with a character missing is a different batch number.

• Quantity per batch on hand

  If you hold two batches of the same compound, count them separately. Sell the older batch first so a batch does not sit for months while a newer one moves.

• Each sale: date, customer, quantity, batch

  One line per sale, with the batch each vial came from. If an order contains vials from two batches, write both.

• How it was sent

  Rider, J&T parcel or pickup, with the tracking reference where there is one. Delivery problems are the most common complaint and this is the record that settles them.

• Notes

  Anything unusual: a parcel that sat at a condo front desk overnight, a delivery during a brownout, a customer who asked for a report. Small notes become important evidence later.

Keep the record for as long as the stock could still be in someone's fridge, and longer if you can. It costs nothing and it is the difference between a supplier relationship that can resolve problems and one that cannot.

What a lab report can and cannot establish

A lab report establishes only what its tests measured, for the sample it was run on. Different questions need different tests, and a report that answers one of them says nothing about the others. This is the single most misunderstood point in the Philippine peptide market, and it is worth knowing well enough to explain to a customer in two sentences.

The main tests a peptide report may cover:

• Identity

  Whether the substance in the vial is the compound on the label. Usually established by mass spectrometry, which measures molecular mass, sometimes alongside a chromatography comparison. Identity says nothing about how much is there or how clean it is.

• Purity

  How much of what is in the vial is the target compound rather than related impurities. Usually reported from HPLC, a chromatography method, as a share of the measured material. Purity assumes identity; a very clean sample of the wrong compound is still the wrong compound.

• Amount or content

  How many milligrams of the compound are actually in the vial, compared with the figure on the label. A vial can be the right compound and clean but underfilled, and only an amount test shows that.

• Bacterial endotoxin

  The level of endotoxin, a fragment of the outer wall of certain bacteria, usually measured by the LAL test and reported in endotoxin units. An endotoxin-only report does not establish identity or purity, and it does not establish amount either.

• Other panels

  Sterility, heavy metals and residual solvents are separate tests again. A report that does not list them has not covered them.

So the honest way to read any report is to find the line that says which tests were requested and then read nothing into it beyond that list. If a report covers endotoxin only, the accurate summary is that this batch was measured for endotoxin and nothing else. A seller who describes that report as proof the product is genuine or pure is overstating it, whether they mean to or not.

How verification keys work

A verification key is a code a laboratory prints on a report so that anyone can open the laboratory's own copy of the result and compare it with the one they were shown. It is the strongest check available to a reseller, because it takes the seller out of the loop.

The general shape is the same across laboratories that offer it. The report carries a task or order number and a key, either as text or as a QR code. Entering them on the laboratory's own website, or opening a link built from them, brings up the result as the laboratory holds it. You then compare the two: compound name, batch, sample description, dates, the tests requested and every figure.

If they match, you know the document was not edited after it left the laboratory. If anything differs, the laboratory's version is the true one, and a report whose key does not resolve, or resolves to a different sample, should not be shown to anyone.

Two limits are worth understanding. First, a key confirms that the laboratory issued that report for that sample. It does not prove the sample came from the vials you are holding; the batch number is what connects the two, which is why matching batches matters. Second, not every laboratory offers a key. A report without one is not automatically false, but it is weaker, and you should say so rather than present it as if it could be checked.

Showing reports to your customers honestly

Show a customer the report for the batch they actually received, describe it in the same scope the report uses, and give them the means to check it themselves. Anything beyond that is your claim rather than the laboratory's, and it is your exposure.

• Match the batch first

  Before sending a report, check the batch on it against the batch in your sales record for that customer. If there is no report for their batch, say so plainly.

• Send the whole document

  Not a crop, not a screenshot of the figure, not a retyped summary. The whole report, with the key where there is one, so the customer can check it without you.

• Use the report's own scope

  If it covers endotoxin, say it covers endotoxin. Do not turn a report that covers one test into a general statement about the product.

• Do not extend it

  A report for one batch does not cover the next batch, a different vial size or a different compound. Say which batch it is for, every time.

• Point to the source

  Where your supplier publishes reports, link the customer to the published page rather than forwarding a file. A public page is easier to trust than an attachment.

None of this stops you selling. Customers in this market are getting better at reading reports, and a reseller who says exactly what a report covers is more believable than one who says more.

Red flags in a peptide lab report

Most problem reports fail on something a reseller can spot in a minute without any laboratory knowledge. Check for these before you rely on a report or pass it on:

• No batch number, or a batch that does not match the vial

  A report that names no batch cannot be tied to any stock. One that names a different batch is about different stock.

• A key that does not resolve

  Or one that opens a different compound, sample or date. Treat the document as unreliable.

• The same report for every batch

  One document shown across months of different runs is not a batch report, whatever it says on it.

• Scope that does not match the claim

  An endotoxin-only report used to support a purity claim, or an identity report used to claim a fill amount.

• Signs of editing

  Mismatched fonts, blurred figures, a cropped header with the laboratory name missing, or a figure that sits on a different alignment from the rest of the page.

• Results with no method

  A purity figure with no test method or no chromatogram behind it, or a suspiciously perfect figure presented without any detail.

• Dates that do not add up

  A report dated before the batch could have existed, or so old that the stock it describes would long since have sold through.

What Primara publishes, and where

Every vial Primara Labs ships carries a batch number. Message the number on WhatsApp and you are told which run it came from, which is how a reseller account keeps its own batch record matched to the source.

Lab reports are published per batch on the batch reports page as they are issued, see /coa for what has been issued so far. Each entry there states what its report covers and what it does not, carries the laboratory's own verification key as plain text where the laboratory issues one, and says that where the laboratory's copy and the published row differ, the laboratory is right.

Do not put testing language on your own page beyond what a published report covers. It becomes your claim rather than ours. What we do and do not claim is set out on the trust page, and the guarantee explains what happens if an independent laboratory disagrees with a label.

When a customer raises a problem with a vial

Ask for the batch number first, then a photo of the vial label and the parcel, then what happened. In that order, because the batch number decides everything that follows.

Look the batch up in your sales record, check when and how it was sent, and send the same details to your supplier in one message. A supplier can trace a batch number; it cannot trace a description. Problems that arrive with a batch number get resolved quickly, and problems that arrive without one tend to turn into disagreements about who is right.

The worst response is to absorb a problem quietly and move on. If something was wrong with a batch, other customers have it too, and your record is the only way to reach them.