There is no single global SO2 limit for desiccated coconut. The EU caps residual sulphur dioxide in dried coconut at 50 mg/kg. The Codex ceiling for the dried-fruit category sits at 1,000 mg/kg. The US sets no numerical limit at all for this product and regulates through labelling instead. That 20-fold spread between the EU and Codex numbers is where containers get rejected: a cargo that is perfectly legal by the exporter’s reading can be double the limit in the destination market.
The desk treats SO2 as a destination question, not a product question. Same coconut, same plant, three different compliance files. Here is what belongs in each one, as of August 2026.
Why is SO2 in desiccated coconut at all?
Sulphur dioxide is a preservative and whitening agent. Processors soak coconut kernel in a sodium metabisulphite solution before drying; the residual SO2 keeps the product white and extends shelf life against browning, per CBI’s market-entry guidance for desiccated coconut. Untreated DC drifts cream-to-yellow over its shelf life. That is a cosmetic defect, not a safety one, but retail buyers pay for white.
The consequence: an origin plant’s default recipe often includes sulphite unless the contract says otherwise. If your spec is silent on SO2, you have effectively delegated the decision to the mill.
What is the EU limit?
50 mg/kg of SO2 in dried coconut, under the E220–E228 sulphite group of Regulation (EC) 1333/2008 on food additives. This is the strictest widely-enforced threshold among major DC import markets, and it is enforced with product withdrawal: in January 2020, a consignment of Indonesian desiccated coconut was removed from the Polish market after testing at more than double the limit.
Two things buyers should track on the EU file. First, sulphites are declarable allergens in the EU above 10 mg/kg, so residual SO2 touches labelling as well as the additive limit. Second, the limit itself is in play: EFSA withdrew the group ADI for sulphites in 2022 after finding the toxicity data insufficient, and a November 2025 EFSA exposure assessment ran the numbers on Commission-proposed alternative maximum levels. No change to the 50 mg/kg figure had been adopted as of August 2026, but the direction of travel is downward, not up. Contracts running into 2027 should anticipate tightening, not relaxation.
How does the US regulate sulfites in desiccated coconut?
Differently. The FDA sets no commodity-specific ppm limit for DC. Sulfiting agents remain GRAS preservatives for dried products; the control is disclosure. Under 21 CFR 101.100(a)(4), sulfites present at 10 ppm or more in the finished food must be declared on the label, with detection defined by the Optimized Monier-Williams method (AOAC 990.28) or LC-MS/MS.
The enforcement teeth are at the border: undeclared sulfites put a shipment under Import Alert 99-21, detention without physical examination. The famous 1986 GRAS revocation for sulfites applied to fruits and vegetables served raw, not to dried products; DC was never in its scope.
Practical reading for a US-bound buyer: sulphited DC is legal at levels that would fail an EU test many times over, provided the label declares it. The risk is not the number, it is the paperwork mismatch between the COA, the ingredient statement, and what is actually in the bag.
What applies in the GCC?
The Gulf states regulate DC through GSO 2299:2013, the technical regulation for grated desiccated coconut, with food additives governed by GSO 2500, the Gulf additive standard built on the Codex GSFA framework. The specific residual-SO2 number inside GSO 2299 sits behind the GSO paywall, and the desk will not quote a figure we have not read. What a GCC-bound spec should do is name both standards explicitly and require the supplier to certify conformity to them, with residual SO2 reported by method on the COA. Where GSO 2500 tracks the GSFA, the practical ceiling will be far closer to the Codex number than the EU one, but treat that as framework logic, not a verified limit.
What does Codex actually say?
Two documents, frequently confused. CXS 177-1991, the Codex standard for desiccated coconut, sets no SO2 limit of its own; its additive section defers to the General Standard for Food Additives. The GSFA entry for dried fruit (category 04.1.2.2, which covers desiccated coconut) permits sulphites at 1,000 mg/kg as residual SO2, adopted in 2006. A circulating claim that “the Codex limit for desiccated coconut is 50 mg/kg” is wrong — that is the EU number wearing a Codex label.
| Market | Instrument | Residual SO2 rule for DC |
|---|---|---|
| EU | Reg. (EC) 1333/2008, E220–E228 | 50 mg/kg max; allergen declaration >10 mg/kg |
| US | 21 CFR 101.100(a)(4); Import Alert 99-21 | No ppm limit; label declaration at ≥10 ppm; detention for undeclared sulfites |
| GCC | GSO 2299:2013 + GSO 2500 (GSFA-based) | Conformity to both standards; exact figure paywalled, spec must name them |
| Codex | CXS 177-1991 → GSFA cat. 04.1.2.2 | 1,000 mg/kg (residual), Note 44 |
What this means for buyers
- Spec to the destination, not the origin. One multi-market program means writing the strictest number, 50 mg/kg, into the master spec, or running separate SKUs per market.
- Make the COA carry the method. Require residual SO2 by Optimized Monier-Williams (AOAC 990.28) on every lot; a bare “SO2: complies” line is not evidence. Our note on reading a desiccated coconut COA covers the other numbers that belong next to it.
- US-bound: audit the label chain. The number rarely fails; the undeclared-sulfite paperwork does, and Import Alert 99-21 detention costs weeks.
- Sulphite-free is a spec choice, not a default. The additive-free segment is growing and organic DC must be preservative-free, but unsulphited product trades whiter-shelf-life risk for cleaner declarations. Decide it in the contract, price the difference.
FAQ
Is there one global SO2 limit for desiccated coconut? No. The EU caps it at 50 mg/kg, Codex’s GSFA allows 1,000 mg/kg for the dried-fruit category, the US has no numerical limit and requires labelling at 10 ppm or more, and the GCC regulates via GSO standards. Specs must name the destination market’s rule.
Does Codex CXS 177 set an SO2 limit for desiccated coconut? No. CXS 177-1991 contains no SO2 figure; it defers to the GSFA, where dried fruit (category 04.1.2.2) permits 1,000 mg/kg residual SO2. Claims of a “Codex 50 mg/kg limit” confuse the EU rule with Codex.
What triggers US sulfite labelling? A detectable amount, defined as 10 ppm or more in the finished food under 21 CFR 101.100(a)(4), measured by Optimized Monier-Williams or LC-MS/MS. Undeclared sulfites above that level expose shipments to detention under Import Alert 99-21.
Will the EU 50 mg/kg limit change? Under review. EFSA withdrew the sulphite group ADI in 2022 and assessed lower Commission-proposed levels in November 2025. Nothing had been adopted as of August 2026, but buyers should expect tightening rather than relaxation.
How should SO2 appear on a COA? As a number with a method: residual SO2 in mg/kg by AOAC 990.28 (Optimized Monier-Williams) or an equivalent validated method, per lot, not per year.
One spec, three regulatory files, zero surprises at the border is a solvable problem. If you would rather hand it to a desk that writes destination-correct specs daily, send us an RFQ.