Alagnaf Olive Oil
Olive oil acidity: how to read the percentage and label
Start with category, origin, dates and lot identification. Free acidity is measured in a laboratory and expressed as an oleic-acid percentage. It is not a sour taste you can assign a number to, and it cannot establish quality by itself.
PublishedA label-reading map
Check the front, back and any date printed on the cap or bottle. Information may appear in several places. This table helps you interpret what you find and ask about gaps; it does not claim that every field is printed on Alagnaf packaging.
| Field | How to read it | Common mistake |
|---|---|---|
| Product category | The full name: extra virgin, virgin or another category | Using natural as a substitute for the grade |
| Origin | The stated origin of the oil | Treating the packer's address as oil origin |
| Business identity and contact | Who can answer questions about this product? | Assuming the brand name identifies a farm |
| Net volume | Millilitres or litres; 1 litre equals 1000 ml | Comparing prices for unequal volumes |
| Dates | Identify harvest, bottling or a date about use | Reading bottling date as harvest date |
| Lot or batch | Copy the exact reference when enquiring | Confusing a product barcode with a batch |
| Storage instructions | Location and any instructions after opening | Replacing them with a general internet rule |
| Acidity, if stated | Check the unit and context; ask about the report | Treating one figure as a full quality certificate |
Read the words around origin and dates
Packed in does not by itself establish where olives grew or oil was extracted. A Libyan company name likewise does not establish the origin of every product it sells. Ask about the oil's own origin when that matters to your purchase and clarify whether a named business grows, mills or packs it.
Harvest date concerns the fruit, bottling date concerns filling the container, and a date about use has its own meaning according to the label. Do not infer an absent harvest date from bottling. This guide does not calculate a replacement shelf life.
What olive-oil free acidity actually measures
IOC method COI/T.20/Doc. No 34/Rev. 1 (2017) determines free fatty acids chemically and expresses the result as an oleic-acid percentage. This is not the percentage of all fatty acids in the oil or a household pH reading.
For illustration only, a laboratory result of “free acidity 0.40%, expressed as oleic acid” describes that measured property in a sample. It does not mean you added 0.40% acid to a meal, and it is not an Alagnaf result. Keep the test name, unit and sample identification alongside the number.
How is olive-oil acidity measured?
The acidity used for olive-oil classification is a laboratory determination of free fatty acids, not a pH reading or a household test. A useful result needs an identified sample, test method and unit so the number can be interpreted correctly.
For a commercial lot, tie the laboratory report to the sample reference, batch and sampling date. A home pH meter or test strip does not measure the same property meant by free-acidity standards.
Why can olive-oil free acidity rise?
Free fatty acids form when triglycerides break down. Higher values can be associated with damaged fruit, delays before processing or poor handling before extraction, but the number alone cannot identify the cause in a particular batch.
That is why free acidity is one part of a wider quality assessment rather than a stand-alone diagnosis. When a result is unexpectedly high, review the sample, lot, other analytical results and production history instead of inferring the cause from taste.
Can you reduce olive-oil acidity at home?
Do not treat free acidity as a sour taste that can be diluted with water or another household ingredient. It is a chemical property of the sample measured in a laboratory, and mixing an oil at home does not turn a non-compliant oil into extra virgin oil.
If the question comes from a high laboratory number, review the report, lot and oil source. If the concern is a bitter or pungent taste, that is a different sensory question and is not the free-acidity percentage.
Bitterness and pungency cannot measure free acidity
Someone may call a pungent oil acidic, but a throat sensation or bitter taste is not a free-acidity measurement. Sensory evaluation and chemical analysis are separate processes. You cannot taste an oil and establish that its free acidity is 0.3% or 0.8%.
Taste still has a practical role: you can notice an unfamiliar aroma or flavour and contact the supplier with the batch details. Colour, a refrigeration experiment and intensity of taste cannot replace a report when technical evidence is needed.
Olive-oil acidity grades: what does the 0.8% extra virgin limit mean?
IOC trade standard COI/T.15/NC No. 3/Rev. 22, June 2026, gives an extra virgin limit of 0.80 g per 100 g as oleic acid. Section 2.1.1.1 defines the category with other requirements, supplemented by the quality criteria in section 4. A number below the limit cannot establish the category alone.
When comparing commercial proposals, do not reduce the decision to the smaller acidity number. Ask whether the report corresponds to the offered lot, which other tests it includes and when the sample was taken. These questions assess evidence; they do not imply that every supplier holds a particular certificate.
Compare two labels without filling in missing facts
Imagine a bottle marked extra virgin with a clear volume, bottling date and lot, but no harvest date. You can identify its declared category, volume, bottling and batch; you cannot invent a harvest year.
Now imagine a second bottle displaying a large acidity figure without an available report or clear batch reference. Record what it says and ask for clarification. Prominent printing does not strengthen the underlying evidence. These are hypothetical reading examples, not reviews of real competing products.
What to include in an enquiry
Send the product name, size, exact date wording, lot reference if present and a clear label photograph through a suitable contact channel. Explain whether you are asking about origin, storage or an analysis figure so the reply can address the right issue.
Alagnaf Olive Oil belongs to ALAGNAF ALHADITHA CO. This guide does not publish an Alagnaf acidity result or an unavailable certificate of analysis. Use the product page for published information and contact the brand about your bottle.