**Indonesia Eucheuma cottonii at 35-37% moisture is the standard export grade for dried raw seaweed: dry enough to resist mold in a sealed container, still heavy enough to hold commercial weight. Premium cleaned lots run below 35%; some salted commodity lots sit at 37-39%. Moisture, not appearance, sets the FOB price.**
Indonesia is described by industry sources as the world’s largest producer of red seaweeds (Eucheuma cottonii, also called Kappaphycus alvarezii, local names cottonii/katoni), the primary source of kappa carrageenan. When a carrageenan processor or private-label health brand asks for “moisture 37” cottonii, they are asking for the workhorse export band that balances shelf stability against yield. Below is how that number moves price, mold risk, and what you actually get in the bag.
Why does moisture 37 matter so much for cottonii?
Dried cottonii is sold by weight, but water is not the product. Every extra point of moisture is water you pay for and water that can grow mold. Once sealed inside a warm 40HC container for 30-60 days at sea, a wet bale sweats. That is why buyers filter by moisture first: it is the single spec that predicts both landed cost per dry kilo and spoilage risk on arrival.
Cottonii is farmed by the longline method (plastic rope tied to lines anchored to seabed poles) across South Sulawesi (Bone, Maros, Jeneponto, Takalar, Luwu, East Luwu), West and East Nusa Tenggara, West Lombok, Maluku, and North Kalimantan, then processed and shipped mainly through Surabaya/East Java. In warm tropical water the crop can reach roughly ten times its mass in 45-50 days. Drying is where moisture is won or lost: sun-drying during monsoon or rainy months takes longer, so wet-season lots often carry higher moisture and softer yield. Risks like ice-ice disease and epiphytes further affect quality.
What moisture bands are actually traded?
Documented wholesale specs vary by trader. Below are real published dried-cottonii spec patterns, so you can see where “moisture 37” sits.
| Spec pattern | Moisture | Foreign matter / impurity | Drying |
|---|---|---|---|
| Standard export A | 35-37% max | 3% max | Sun-dried |
| Standard export B | 35-37% | 5% max | Sun-dried |
| Commodity band | 37-39% | 2% max | Sun-dried |
| Premium “Dried Raw Algae Grade A” | Below 35% | Below 2% | Grade A & B selection |
Treat any moisture, ash, foreign-matter, microbiological, heavy-metal, or carrageenan-yield figure as claimable only when it comes from a specific batch Certificate of Analysis (COA). We do not print a single fixed number and call it guaranteed; we quote the band, then confirm your lot on paper.
How does moisture change the price?
Here is the canonical FOB band we use consistently. Prices are FOB indicative per 2026, moving with harvest, moisture, and grade; final quote confirmed on your spec and MOQ.
| Grade | Moisture | Typical use | FOB USD/kg |
|---|---|---|---|
| Commodity / salted | 37-39% (higher moisture) | Bulk carrageenan feedstock | 4-7 |
| Standard export | 35-37% | Carrageenan, general processing | 6-9 |
| Higher-grade, low-moisture clean | Below 35% | High gel-strength, low impurity | 9-12 |
| Cleaned / washed food-grade bulk | Batch-specified | Food, nutraceutical, gel base | 25-55 |
Branded Western retail sea moss sells far higher than any of these; that is not our FOB quote. Note the trade-off: a 37-39% commodity lot looks cheap per kilo, but you are buying more water and accepting more foreign matter, so cost per dry, usable kilo can land close to a cleaner 35% lot. Buyers optimizing carrageenan yield usually target 35% or below.
What do you get in the container?
Packaging is bales wrapped in polypropylene cloth, in 50 kg or 100 kg bags. Container loading runs about 15 MT in a 20ft, 23 MT in a 40ft, and 25 MT in a 40HC (roughly 350 x 100 kg bales per 40HC). Shelf life is about 12 months when stored cool, dry, sealed, and away from direct sunlight. Typical export documents: COA, MSDS, Fumigation Certificate, Phytosanitary Certificate, and Certificate of Origin (COO), with Halal and HACCP/ISO 22000 supplied on request.
How ordering by moisture grade works
- Send your target spec. Tell us moisture ceiling (e.g. 35% or 37%), foreign-matter limit, carrageenan-yield need, MOQ, and destination port.
- We match the band. We identify farm lots and drying batches that fit, then share an indicative FOB by band, date-stamped for 2026.
- Sample and COA. You receive a sample and the batch COA (moisture, ash, foreign matter, microbiological, heavy metals, carrageenan yield) so the moisture figure is verified on your actual lot, not assumed.
- Confirm terms. Lock grade, MOQ (1 MT trial rising to 20-100 MT contracts, container ~20-25 MT), Incoterm (FOB/CIF/CNF), and payment (T/T, 100% LC at sight irrevocable, or 100% advance).
- Production and packing. Lots are consolidated and baled in 50/100 kg PP-wrapped bags, loaded per container capacity.
- Documents and shipment. Export papers issued; goods ship worldwide, delivery typically 30-60 days after payment is approved.
Ready to quote by moisture grade?
Tell us the exact moisture ceiling and MOQ you need, and our desk will match the lot and return a date-stamped FOB band with COA-backed specs.
Bali Premium Trip export desk — WhatsApp 6281128590000 · sales@balipremiumtrip.com. Response within 24 working hours. Honesty first: prices are indicative, not a contract; moisture and other specs are confirmed only per batch COA; we cannot guarantee customs clearance in your country; and sea moss is a food ingredient, not medicine. We quote what a batch actually tests, never a number we cannot document.
Frequently Asked Questions
Is 37% moisture too wet to export cottonii safely?
No. 35-37% is a recognised standard export band, and some traders ship 37-39% commodity lots. The key is that the bales are fully sun-dried, sealed in polypropylene, and loaded promptly. Wetter lots carry more mold risk over a 30-60 day voyage, so many buyers set a 35% ceiling for higher gel-strength processing.
Can you guarantee the exact 37% moisture figure before I buy?
We quote the band, then verify your specific lot by batch COA. We treat any moisture number as claimable only when it comes from a Certificate of Analysis on that shipment. Moisture also drifts with weather and drying time, especially during monsoon months, so the COA on your consolidated batch is the figure that governs, not a website average.
Does higher moisture cottonii cost less per kilogram?
Yes, on paper. Commodity 37-39% lots sit around USD 4-7/kg FOB versus 6-9 for standard 35-37% and 9-12 for cleaner sub-35% grades (indicative per 2026). But higher moisture means more water and often more foreign matter, so cost per dry, usable kilo and your carrageenan yield can narrow that gap considerably.
What moisture level best protects cottonii during shipping?
Lower moisture stores and travels better. Sub-35% premium lots with under 2% impurity carry the least mold and sweating risk in a sealed container, and dried cottonii keeps about 12 months when stored cool, dry, sealed, and out of sunlight. If you are shipping to a humid climate or holding stock, target 35% or below rather than the 37-39% commodity band.