Jeddah and Dammam warehouses regularly sit above 45 C for weeks, and a humate bag that gains moisture in that environment will cake into a solid block before the season starts. This grade is dried to a maximum 15% moisture and packed in a heat-sealed PE liner, and in our own storage trials the bag content stays free flowing after six months at 40 C and 60% relative humidity.
The moisture figure is not the only variable. Granule hardness matters too. A soft granule pressed under 1.2 tonnes of pallet load will deform and knit together at the contact points, and that is what turns a pallet into a single lump. We hold crushing strength above 8 N per granule and stack no more than four pallets high in the container, which keeps the bottom bags intact on arrival.
For buyers who store material for more than six months, we recommend a first-in first-out rotation and opening the liner only when the bag is ready to be used. A part-used bag should be folded over and clipped rather than left open under a fan, because moving humid air is worse than still air for moisture pickup.
Key Features
- 15% maximum moisture: dried and tested per lot, so the granule has headroom before it reaches the caking threshold in hot storage.
- Heat-sealed PE liner: a closed liner, not a folded one, is what keeps monsoon or coastal humidity out of the bag.
- High crushing strength: above 8 N per granule, so pallet stacking does not fuse the bags into blocks.
- Six-month storage trial: free-flowing after six months at 40 C and 60% relative humidity in our own warehouse test.
- Stacking guidance: four pallets maximum in a container, with a loading pattern drawing that we supply to the stuffing crew.
- Clear lot dates: production date and lot number printed on each bag for first-in first-out control in your warehouse.
Technical Specifications
| Parameter | Specification |
|---|
| Product name | Sodium Humate Granules, hot climate storage grade |
| CAS number | 68131-04-4 |
| HS code | 38249999 |
| Total humic acid (dry basis) | ≥60% |
| Total organic matter (dry basis) | ≥80% |
| Water solubility | ≥98% |
| pH (1% solution) | 9-11 |
| Moisture | ≤15%, typically 11-13% |
| Granule size | 1.5-2.5 mm |
| Crushing strength | ≥8 N per granule |
| Standard | HG/T 3278-2018 Type II |
Applications and Dosage Guidance
Storage conditions do not change the field rate, but they do change how the material behaves on opening. In a hot dry climate the granule is usually ready to spread straight from the bag; in a coastal warehouse the bag should be brought into shade for a few hours before opening so condensation does not form on the liner. Apply 1,500-3,000 kg per hectare on acidic upland soil, 750-2,250 kg per hectare with gypsum on saline-alkali land, and 200-400 kg per hectare banded at planting for cereals.
Where material is decanted into farm stores, keep the liner closed between uses and store bags off a concrete floor on pallets, since floor moisture wicks through the bag base. On pivot-irrigated land, dissolve the granule in a shaded tank rather than in direct sun, and use the solution within a day to avoid algae growth in warm water.
Packaging, Documentation and Quality Assurance
Packing is 25 kg PP woven bags with a heat-sealed PE inner liner, 40 bags per 1 tonne pallet, stretch wrapped with a top cover sheet for container transit. We load a maximum of four pallets high and supply a stuffing diagram so the loading crew follows the same pattern. Jumbo bags of 1,000 kg are available with a moisture barrier liner.
Every shipment carries COA with the actual moisture value for the lot, MSDS and a storage recommendation sheet for hot climates. Retained samples are held for twelve months. If a bag arrives caked, we will examine the retained sample and the container temperature record before discussing the cause, because in our experience most caking traces back to a liner left open at the port rather than to the material itself.
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