How to read a vanilla certificate of analysis
Last reviewed
I have been sent a lab report. How do I know it means anything?
Check five things before the figures themselves: that the lot reference matches your offer, that the analysis is recent, that the laboratory is named and accredited, that vanillin is reported on a stated basis, and that the method is specified. A report missing any of these describes some vanilla somewhere, not necessarily yours.
Check the frame before the figures
Most buyers open a certificate of analysis and go straight to the vanillin number. That is the wrong order. A high figure on a report that does not relate to your lot tells you nothing at all, and a modest figure on a properly issued report tells you everything you need.
So the sequence is: establish that the report is about the vanilla you are being offered, then read what it says.
Then the figures
Once the frame holds, two numbers carry most of the commercial weight.Moisture tells you how much dry matter you are buying per kilogram — the basis on which two offers become comparable.Vanillin tells you how the lot will behave in extraction. Neither is interpretable without the other.
How to convert both into a single comparable price →
A note on expectations: industry specifications commonly state a minimum of around 1.5 % vanillin for gourmet grade and 1.2 % for extraction grade. A report claiming figures far above the market for the same grade is not impossible — exceptional lots exist — but it is a reason to look harder at the method and the laboratory, not a reason to celebrate.
What should stop you
- No lot reference, or a reference that does not appear on the invoice and packing list.
- A scan with no letterhead, no signature and no laboratory address. Reports circulate widely between traders; a PDF proves that a document exists, not that your counterparty holds the goods.
- A vanillin figure with no basis and no method.
- Reluctance to provide the original or to let you contact the laboratory. A legitimate exporter has no reason to object.
- A report that arrives only after you insist. Not proof of anything wrong, but it tells you how the relationship will go once there is a problem.
The wider set of verification checks →
The checklist
Run this against any report, from any supplier. It takes about five minutes and it is the cheapest quality control available to you.
The lot reference matches the offer
The single most important line, and the one most often absent. Without a lot reference that matches what you are being quoted, the report describes some vanilla somewhere.
The analysis date is recent and relates to this harvest
Moisture in particular shifts with storage and transport. A report from a previous campaign is history, not specification.
The laboratory is named, and accredited
Look for the name, the address and an accreditation reference (ISO/IEC 17025 or a national equivalent). "Internal laboratory" is a declaration by the seller, not an independent measurement.
Vanillin is reported on a stated basis
Dry basis or as-is. The same lot can read 2.0 % or 1.4 % depending on which is used. A figure with no stated basis cannot be compared with anything.
The method is specified
HPLC is the expected method for vanillin. If no method is given, you cannot know whether the figure is comparable to another supplier’s.
Moisture is present alongside vanillin
One without the other is half a specification. You need both to compare offers on a dry-matter basis.
Microbiological results cover what your process requires
Total plate count, yeasts and moulds, Salmonella, E. coli. What matters depends on whether your process includes a kill step — ask your own QA team what to require.
Pesticide residues, if you sell into the EU or US
Both have maximum residue levels. Ask whether the screen covers the substances relevant to your market, not just a generic panel.
Asking for a report you can actually use
Most suppliers will send whatever they have on file. You get a usable document by specifying what you want, in the request for quotation rather than after the order:
Please provide a certificate of analysis for the lot offered, issued by an accredited third-party laboratory, stating vanillin content by HPLC on a dry basis, moisture content with the method used, the lot reference and the analysis date.
Two things follow. You get a comparable document — and you learn something from how the request is received. A supplier who provides it without friction is a supplier who tests their lots. One who negotiates the request is telling you they do not.
For what it is worth: we send the report with the quotation rather than waiting to be asked. It is not generosity, it is the fastest way to have a technical conversation instead of a commercial one.
Questions we get asked
What is a certificate of analysis for vanilla?
A laboratory report stating the measured characteristics of a specific lot: vanillin content, moisture, and usually microbiological and pesticide residue results. It is issued against a lot reference, not against a supplier.
Who should issue it?
An independent, accredited laboratory. A report on the exporter’s own letterhead is not worthless, but it is a declaration rather than an analysis, and should be treated as such.
How recent should the analysis be?
It should correspond to the current lot. Vanillin does not change quickly, but moisture does, and a report from a previous harvest tells you about a batch you are not buying.