What moisture and water activity should freeze-dried jackfruit have, and what should the COA show?
Export-grade freeze-dried jackfruit should be released at moisture ≤5.0% and water activity (aw) ≤0.30. At FruitBuys partner facilities it typically comes off the dryer at 2.5–4.0% moisture and aw 0.18–0.25, a built-in margin against softening in transit. Put both numbers on the lot COA. Supplier checks are in the bulk buying guide.
The lot COA that travels with your container should confirm those two numbers, plus four microbiological limits:
- total plate count ≤10⁴ CFU/g
- yeasts and moulds ≤10² CFU/g
- E. coli <10 CFU/g
- Salmonella not detected in 25 g
Put those six limits into the purchase agreement as written. Avoid “supplier standard” or “to be agreed later”. Those phrases are where acceptance disputes and port holds begin.
Why does freeze-dried jackfruit need tighter moisture control than most fruit?
Because Vietnamese jackfruit is very sweet. Thai jackfruit from Tien Giang, Dong Nai and the Central Highlands reaches 18–24° Brix when ripe. Once the water is taken below 5%, its natural fructose and glucose become strongly hygroscopic: they pull moisture straight out of the air.
On the factory floor, freeze-dried jackfruit left open in humid air starts to feel sticky within about 30 minutes and softens soon after.
The two release numbers do different jobs:
- Moisture is the water you pay for. Product at 5% moisture is 95% fruit solids; at 8% it is 92%. Above 5% the porous structure starts to lose its crunch.
- Water activity is how freely that water can move. It decides two things. Below 0.60 microorganisms cannot grow. Below 0.30 the sugars stay glassy and the pieces stay crisp. Above about 0.35 the sugars soften, pieces stick together and the structure collapses.
Commercial rule: if a supplier says the product is stable but will not put both moisture and water activity on the lot certificate, the risk of softening has moved to your warehouse.
Which release specification should go into the contract?
Lock these limits directly into your purchase agreement.
| Parameter | FruitBuys release limit | International commercial range | Testing frequency | What it controls |
|---|---|---|---|---|
| Moisture | ≤5.0% (typical 2.5–4.0%) | ≤5.0% | Every production lot | Crispness; not paying for water |
| Water activity | ≤0.30 (typical 0.18–0.25) | ≤0.30 | Every production lot | Sugar caking, collapse, microbial margin |
| Total plate count | ≤10⁴ CFU/g | up to 5 × 10⁴ CFU/g | Every production lot | Hygiene of bulb separation and trimming |
| Yeasts and moulds | ≤10² CFU/g | up to 500 CFU/g | Every production lot | Drying room air and packing hygiene |
| E. coli | <10 CFU/g | <10 CFU/g | Every production lot | Process water and worker hygiene |
| Salmonella spp. | Not detected / 25 g | Not detected / 25 g | Every production lot | Ready-to-eat safety, non-negotiable |
| Lead, arsenic | Below destination maximum levels | Market-specific | Periodic third-party audit | Soil and raw fruit baseline |
| Aflatoxin (total, B1) | Below destination maximum levels | Market-specific | Periodic third-party audit | Raw fruit freshness and storage |
| Listeria monocytogenes | Not detected / 25 g | Retailer-specific | Extended (US retail) | Retail supply chain mandates |
How to use the table: take the FruitBuys column as your baseline.
- If your retailer’s specification is tighter, the tighter figure goes into the contract.
- If it is looser, keep ours. You lose nothing, and you gain margin against softening in transit.
- Add the extended tests your channel needs, such as cadmium or a pesticide multi-residue screen for some EU buyers, and agree who pays before the order. For full containers FruitBuys arranges them at an accredited laboratory of your choice, such as Eurofins or SGS in Vietnam, before the container is sealed; on trial orders they run at net laboratory cost, credited back in full against your first full container.
Some destinations also check substances that are not in any published list, based on recent border alerts. They are covered by market in freeze-dried jackfruit HS code and import documents.
How do you read a supplier’s laboratory report without getting trapped?
Separate two documents that suppliers often present as one.
1. The independent baseline audit (process capability). This is periodic testing by an accredited third-party laboratory (ISO/IEC 17025). It covers heavy metals, mycotoxins and core pathogens. It proves the production network operates within international food safety limits.
Our most recent baseline report for FruitBuys freeze-dried jackfruit shows:
- water activity 0.209
- E. coli <10 CFU/g
- Salmonella not detected in 25 g
- total aflatoxin and aflatoxin B1 not detected
- lead and arsenic not detected
2. The lot release COA (shipment clearance). This document travels with your container. It confirms the batch-specific numbers: moisture, water activity, total plate count, yeasts and moulds, E. coli and Salmonella.
When you review any manufacturer’s report, check three things:
- Recognised methods. Look for ISO 18787 for water activity, ISO 6579-1 for Salmonella and ISO 16649-2 for E. coli. Accredited laboratories routinely subcontract specialised physical tests such as water activity to accredited partners; that is normal. Unaccredited in-house test slips presented as a COA are not.
- Stability, not only safety. A report with zero pathogens means little if moisture and water activity are missing. A product can be microbiologically clean and still be physically ruined within three weeks if it was released above aw 0.35.
- The right document for the right decision. Use the baseline audit to qualify the supplier. Use the lot COA to accept the shipment. A baseline report on its own does not release your container.
How does COA verification work on orders below one full container?
Trial orders and LCL shipments are a normal step before a container contract. They are handled differently from full-container lots, not left without checks.
- Full container: a dedicated third-party lot COA covering all six release parameters travels with the shipment.
- Trial and LCL orders (pallet scale to 1–2 tonnes):
- Factory in-house release QC, at no cost. Every batch is released against calibrated moisture and water activity meter readings and a sensory check of colour, crunch and seal integrity. You receive the release log for your batch.
- Baseline audit dossier. Smaller orders are backed by FruitBuys’ periodic third-party reports for heavy metals, aflatoxin and core pathogens.
- Dedicated batch testing, if your QA requires it. We arrange independent third-party testing on your LCL batch before dispatch. It runs at net laboratory cost and is credited back in full against your first full container.
What this means for you: a trial order can be accepted on the in-house release log plus the baseline dossier. Commission a third-party batch test only where your own QA protocol requires it.
Is freeze-dried jackfruit ready-to-eat without a further kill step?
Yes, it is sold and eaten as a ready-to-eat product. Its safety comes from hygiene and release testing, not from the drying step itself.
Freeze-drying removes water at low temperature. It stops microorganisms from growing, but it is not a cooking step. Control therefore sits in three places:
- clean bulb separation and trimming before freezing;
- hygiene in the drying and packing rooms;
- the microbiological release limits above, tested on every full-container lot COA.
For channels where the product is eaten straight from the pack in the US, add Listeria to the release tests and ask for the supplier’s hazard analysis.
Does freeze-dried jackfruit contain added sugar?
FruitBuys freeze-dried jackfruit is 100% jackfruit with no sugar added. The sweetness comes from the fruit’s 18–24° Brix, concentrated as the water is removed.
On a retail label, “no added sugar” is allowed. Total sugars must still be declared, and the figure will be high.
Some dried jackfruit on the market is syrup-infused before drying, which changes both the label and the HS code. Ask for a signed ingredient declaration and check it against the nutrition panel.
When is this specification not enough?
- High-humidity markets and open-bag use. A product released at aw 0.25 still goes sticky within half an hour in humid air. From that point, packaging and storage decide shelf life; see how bulk freeze-dried jackfruit is packed and loaded.
- Moist recipes. In yogurt, fillings or chilled desserts, the fruit softens regardless of how dry it left the factory.
- Retailer-specific panels. Some retailers add tests beyond this list. Bring their specification to the first conversation so those tests are priced in.
To keep bulk lots matched to the sample you approve, read how freeze-dried jackfruit is produced and controlled from sample to bulk. For supplier selection and forms, start with our freeze-dried jackfruit buyer guide.
Lock the specification before the sample
Send us your channel, destination and retailer requirements. We will return:
- the release specification for your contract;
- the lot COA set and any extended tests your market needs;
- our latest baseline audit report.
Email [email protected] · WhatsApp Export +84 919 739 589
FAQ
What moisture should freeze-dried jackfruit have?
5.0% or lower. FruitBuys production typically runs at 2.5–4.0%.
What water activity is right for freeze-dried jackfruit?
0.30 or lower, typically 0.18–0.25. Above about 0.35 the pieces start to stick and collapse.
What are the microbiological limits for freeze-dried jackfruit?
Total plate count ≤10⁴ CFU/g, yeasts and moulds ≤10² CFU/g, E. coli <10 CFU/g and Salmonella not detected in 25 g.
Does every container come with a COA?
Yes. Every full-container lot ships with a third-party COA covering moisture, water activity, total plate count, yeasts and moulds, E. coli and Salmonella.
What do I get on a trial or LCL order?
A free in-house release QC log for your batch, plus our periodic third-party baseline reports. Independent batch testing runs at net laboratory cost and is credited back in full against your first full container.
Why does freeze-dried jackfruit get sticky?
Its natural sugars pull moisture from the air. Opened in humid conditions, it turns sticky within about 30 minutes. Keep bags sealed and re-seal immediately.
About the author. Udo Nguyen is CEO of FruitBuys Vietnam. He coordinates freeze-dried fruit sourcing, qualified partner facilities and export documentation for importers, food manufacturers and private-label brands.
