Sulphur Bentonite 90%

90% S pastilles that disperse on contact with moisture

Sulphur bentonite is a fertilizer product rather than a chemical feedstock, and the 10% bentonite clay in it is the entire point. Elemental sulphur on its own is agronomically slow: a hard 2–4 mm pastille sitting in soil has very little surface area, so the bacteria that oxidise sulphur to plant-available sulphate work on it for months. Blend in swelling bentonite and the pastille absorbs soil moisture, expands and disintegrates into fine particles within days — multiplying the surface area by orders of magnitude and pulling the oxidation window down from a season to weeks. That is why the standard analysis is 90% S with 10% bentonite: enough clay to guarantee dispersion, not so much that you are freighting inert filler. Pastilles are typically 2–4 mm, moisture ≤ 1%, with hardness and a dispersion or disintegration test being the two acceptance criteria that actually separate a good product from a cosmetically similar one.

Buy sulphur bentonite instead of prilled or powdered elemental sulphur when the product is going into the ground as a nutrient and the crop needs the sulphur this season. Its granular size and hardness match urea, DAP, MAP and MOP closely enough to blend and spread without segregation, so it drops straight into a bulk-blend NPK line and through a standard spreader — which powder cannot do at all, and which plain prilled sulphur does mechanically but not agronomically, since a plain prill just sits there. Against a sulphate fertilizer such as ammonium sulphate or gypsum, you are trading immediate availability for concentration and economy: at 90% S it carries roughly four times the sulphur of ammonium sulphate per tonne, so you move and spread far less material for the same nutrient, and the bentonite recovers most of the speed you gave up. Oilseeds, brassicas, alfalfa, maize and any high-pH soil needing acidification are the natural fits. CBIL supplies sulphur bentonite pastilles against COA and SGS verification of sulphur content, bentonite content, moisture, particle size, hardness and dispersion, in 25 kg and 50 kg bags, 1 MT jumbo bags and bulk, on FOB, CFR and CIF terms.