Ammonium Sulfate Supplier for Bulk Fertilizer and Industrial Buyers
SUHA International Trading is an ammonium sulfate supplier and exporter shipping agriculture-grade and industrial-grade (NH₄)₂SO₄ from Mersin, Türkiye and Jebel Ali, UAE. We supply granular and crystal material at about 21% nitrogen and 24% sulfur, in 25 kg or 50 kg bags or 1 MT jumbo bags, from one full 20ft container upward.
Every shipment comes with a batch certificate of analysis, a safety data sheet and a certificate of origin, quoted FOB, CFR or CIF to your port.
Maintained by the export desk of SUHA International Trading L.L.C. · Dubai, UAE & Ankara, Türkiye · Last reviewed .
- Product
- Ammonium sulfate (NH₄)₂SO₄
- Also spelled
- Ammonium sulphate
- CAS number
- 7783-20-2
- HS code
- 3102.21
- Nutrients
- ≈ 21% N · ≈ 24% S
- Forms
- Granular · Crystal
- Packing
- 25 kg · 50 kg · 1 MT FIBC
- MOQ
- 1 × 20ft FCL
- Loading ports
- Mersin · Jebel Ali
- Incoterms
- FOB · CFR · CIF
- Transport class
- Not dangerous goods
- Payment
- T/T · L/C at sight
What Is Ammonium Sulfate?
Ammonium sulfate is an inorganic salt with the formula (NH₄)₂SO₄. It is a white to off-white, odourless solid that dissolves easily in water. Most of the world's supply is used as a nitrogen and sulfur fertilizer: pure ammonium sulfate contains 21.2% nitrogen in ammonium form and 24.3% sulfur in sulfate form, both directly available to plants.
It is produced in three main ways: as a co-product of caprolactam, the raw material for nylon 6; as a by-product of scrubbing ammonia from coke-oven and other industrial gases; and by reacting ammonia directly with sulfuric acid. The production route affects colour, crystal size and trace impurities, which is why a good ammonium sulfate supplier names the grade and the origin on every offer.
Key properties
| Property | Value | Why it matters to you |
|---|---|---|
| Formula · molar mass | (NH₄)₂SO₄ · 132.14 g/mol | Basis for nutrient and dosing calculations |
| Nitrogen · sulfur (pure salt) | 21.2% N · 24.3% S | Commercial grades are guaranteed slightly below these figures |
| Density (solid) | 1.77 g/cm³ | Container and warehouse planning |
| Solubility in water | ≈ 75 g per 100 mL at 20 °C | Dissolves fully for fertigation, spray tanks and process use |
| pH of solution | ≈ 5.5 (0.1 M) | Mildly acidic in solution; acidifies soil over time |
| Critical relative humidity | ≈ 79% at 30 °C | Less moisture-sensitive than urea or ammonium nitrate, but still cakes if stored damp |
| Thermal behaviour | Decomposes above ≈ 250 °C | Releases ammonia and sulfur oxides; keep away from heat sources |
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Agriculture Grade and Industrial Grade Ammonium Sulfate
Two offers that both say "ammonium sulfate 21%" can be quite different materials. Agriculture grade is bought on nutrient content and particle size; industrial grade is bought on purity. Pick the form that matches your use.
Granular ammonium sulfate — agriculture grade
Sized granules that spread evenly and sit well with urea, DAP and potash in bulk blends without separating in the spreader.
Best for
Fertilizer blenders, distributors and mechanised farms
Typical particle size
Most granules within about 2–5 mm
Nutrients
≈ 20.5–21% N · ≈ 24% S
Ask the supplier for
- Size distribution
- Granule hardness
- Moisture
Crystal ammonium sulfate — agriculture grade
Finer crystalline material that dissolves quickly. Usually the lower-cost form, suited to direct application, fertigation and compound fertilizer production.
Best for
NPK plants, fertigation, direct soil application
Form
White to off-white crystals
Nutrients
≈ 20.5–21% N · ≈ 24% S
Ask the supplier for
- Moisture
- Free acid
- Anti-caking treatment
Industrial grade ammonium sulfate
Crystal material bought on purity, because it becomes part of a chemical process rather than a soil input. Batch-to-batch consistency matters more than particle size.
Best for
Water treatment, fire retardants, tanneries, textile mills, chemical plants
Form
White crystal
Key values
Assay, free acid, iron, heavy metals, insolubles
Ask the supplier for
- Measured impurity figures
- Batch traceability
- Sample before contract
Ammonium Sulphate Specification
As an ammonium sulphate supplier working with several producing plants, we publish typical ranges here. Values vary with the plant, so the figures that bind us are the ones written on your offer and on the batch certificate of analysis. The full technical data sheet and SDS are sent with the quotation, before you order.
| Parameter | Agriculture grade | Industrial grade |
|---|---|---|
| Nitrogen (N) | ≥ 20.5–21.0% | ≥ 21.0% |
| Sulfur (S) | ≥ 24.0% | ≥ 24.0% |
| Moisture | ≤ 1.0% | ≤ 0.5% |
| Free acid (as H₂SO₄) | Low — stated on COA | Very low — stated on COA |
| Iron, heavy metals, insolubles | Not usually specified | Stated as measured values on COA |
| Particle size | Granular ≈ 2–5 mm · crystal finer | Crystal |
| Appearance | White, off-white or beige | White crystal |
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Bulk Ammonium Sulfate Supplier — Packing, MOQ and Loading
The minimum order is one full 20ft container (1 × 20ft FCL). Net weight per container depends on the packing and the shipping line's payload limit, so it is confirmed on the offer. As an ammonium sulfate wholesale supplier we also quote repeat container programmes for distributors and blenders, and break-bulk cargo for large tonnages.
| Packing | Typical load per 20ft FCL | Best suited to |
|---|---|---|
| 25 kg woven PP bags, PE liner | ≈ 25–27 MT | Retail distribution and manual handling |
| 50 kg woven PP bags, PE liner | ≈ 25–27 MT | Distributors and farms |
| 1,000 kg FIBC jumbo bags | ≈ 20–25 MT | Blenders, NPK plants and industrial users with forklifts |
| Break-bulk vessel | On enquiry | Large tenders and port-side bagging |
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Who we supply
Ammonium Sulfate Exporter — Ports, Incoterms and Documents
We load export cargo at Mersin, Türkiye and Jebel Ali, UAE, so each offer can use the origin with the better freight and availability for your destination. Ammonium sulfate is not regulated as dangerous goods for sea, road or air transport, so it moves as general cargo in standard dry containers.
Coverage
- All 81 provinces of Türkiye
- All 7 emirates of the UAE
- Africa, Asia, Europe, the Americas and Oceania
Incoterms
- FOB Mersin or Jebel Ali
- CFR / CIF your discharge port
- Freight and transit quoted per destination
Documents
- Certificate of analysis (batch)
- Safety data sheet
- Invoice, packing list, bill of lading
- Certificate of origin
- Import-specific papers and third-party inspection on request
From enquiry to delivery
Send the enquiry
By contact form, WhatsApp or email: grade, form, quantity, packing, destination port and Incoterm.
Receive a formal offer
Price in USD per metric ton, origin, Incoterm, validity, payment terms and loading window, with the TDS and COA format attached.
Confirm order and terms
T/T, usually 30% advance and the balance against a copy of the bill of lading, or an irrevocable L/C at sight.
Optional inspection
Independent pre-shipment inspection before loading, at the buyer's cost. Recommended for first orders and L/C deals.
Loading and tracking
Container and B/L references are shared for tracking, and the document set is sent electronically after departure.
How to Choose an Ammonium Sulfate Supplier
Most problems with imported ammonium sulfate come from vague offers, not from the chemistry. Before you sign, check that the supplier can answer all six points in writing.
- Grade and form named on the offerAgriculture or industrial, granular or crystal, with minimum N and S.
- Origin statedThe producing country and route, so you know what impurity profile to expect.
- Batch COA, not a templateMeasured values with a lot number that matches the bags.
- Packing and net weight per containerSo your landed cost per ton is calculated on real tonnage.
- Clear Incoterm and validityFOB or CFR/CIF, with the date the price expires.
- Sample or inspection optionA sample from the same source, or the right to inspect before loading.
Ammonium sulfate manufacturer or supplier?
SUHA International Trading is a supplier and exporter, not a producing plant. We buy directly from ammonium sulfate manufacturers and state the origin on every offer and certificate of origin. You get manufacturer-direct material, with one partner checking quality, preparing documents and booking freight from two origins.
Ammonium Sulfate Price: How It Is Quoted and Compared
Ammonium sulfate is quoted in US dollars per metric ton for a named grade, packing and Incoterm. Prices follow the global nitrogen and sulfur markets and the planting seasons of the main importing regions, so every offer carries a validity date. Granular usually costs more than crystal, and 25 kg bags cost more per ton than jumbo bags.
Compare cost per kilogram of nitrogen, not price per ton
A metric ton of ammonium sulfate at 21% N holds 210 kg of nitrogen, so cost per kg N = price per MT ÷ 210
Urea holds about 460 kg N per ton, so it is normally cheaper per unit of nitrogen. Ammonium sulfate also delivers about 240 kg of sulfur per ton, which is the reason to buy it for sulfur-hungry crops and alkaline soils.
Cost-per-nitrogen calculator
Enter the prices from the offers you hold. Nothing is stored or sent.
What Is Ammonium Sulfate Used For?
Agriculture
Ammonium sulfate supplies nitrogen and sulfur in one product. Sulfur deficiency in crops has become more common as industrial sulfur emissions have fallen, and the acidifying effect of ammonium sulfate is useful on alkaline soils.
Cereals and rice
Wheat, barley, maize and paddy rice. The ammonium form suits flooded rice soils, where nitrate is easily lost.
Oilseeds and brassicas
Canola, mustard and cabbage-family crops need a lot of sulfur, which is the main reason to choose ammonium sulfate.
Vegetables, fruit and turf
Onion, garlic, potato, citrus, grapes and lawns, applied directly, in blends or through fertigation.
Blends and compounds
Granular grade is a standard part of NPK bulk blends; crystal grade feeds compound fertilizer plants.
Ammonium sulfate vs urea
| Factor | Ammonium sulfate | Urea |
|---|---|---|
| Nitrogen | ≈ 21% N | ≈ 46% N |
| Sulfur | ≈ 24% S | None |
| Nitrogen form | Ammonium | Amide, converts to ammonium in soil |
| Lime needed to offset acidity | ≈ 5.4 kg CaCO₃ per kg N | ≈ 1.8 kg CaCO₃ per kg N |
| Ammonia loss when left on the surface | Low on most soils; higher on high-pH calcareous soils | Higher, unless incorporated or treated |
| Best fit | Sulfur-deficient and alkaline soils, blends | Lowest cost per unit of nitrogen |
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Industry
Drinking-water treatment
The ammonia source for chloramination, which gives a longer-lasting disinfectant residual in the pipe network. The flocculant in water treatment is aluminium sulfate, a different product.
Herbicide adjuvant
Added to spray tanks to tie up calcium, magnesium and iron in hard water, which otherwise reduce the performance of herbicides such as glyphosate.
Fire retardants
Used in fire-retardant formulations for wood, paper and textiles, and in some wildland fire retardants.
Leather and textiles
Deliming of hides in tanneries, and pH control in acid dyeing of wool and nylon.
Fermentation and laboratories
A nitrogen nutrient for yeast and fermentation, and the standard salt for protein precipitation in biochemistry.
Chemical production
A raw material for other ammonium compounds and a processing aid in several chemical plants.
Storage and Safe Handling
Ammonium sulfate is a low-hazard product and is not classified as dangerous goods for transport. Dust can still irritate eyes, skin and airways, so follow the SDS supplied with every order and your own site rules.
Storage
Dry, covered, ventilated warehouse, on pallets and off the floor. Keep bags closed: the salt takes up moisture in humid air and can cake.
Keep apart from
Lime, caustic soda and other strong alkalis, which release ammonia gas, and strong oxidizers, chlorates and nitrites.
Protection
Safety glasses, gloves and a dust mask when handling open product. Rinse skin or eye contact with plenty of water.
Environment
Keep spills out of drains and waterways, where excess nitrogen feeds algae. Sweep up dry spills and reuse or dispose of them under local rules.
Looking for a reliable ammonium sulfate supplier?
Send grade, form, quantity, packing, destination port and Incoterm. You get a formal FOB or CIF offer with the technical data sheet and the certificate-of-analysis format attached.
Speak to the export desk
Enquiries are answered within one working day. For tender deadlines, WhatsApp is the fastest channel.
WA WhatsApp — fastest response+971 50 720 9246 @ Email — formal RFQ and documentsinfo@causticsodaco.comEight lines for a same-day quote
- Grade: agriculture or industrial
- Form: granular or crystal
- Specification: minimum N and S, or the impurity limits you need
- Quantity: containers per shipment and per year
- Packing: 25 kg, 50 kg or 1 MT FIBC, neutral or branded
- Destination: port and country
- Incoterm: FOB, CFR or CIF
- Documents: inspection or import-registration needs
Ammonium Sulfate FAQ
What is ammonium sulfate used for?
Mainly as a fertilizer that supplies both nitrogen and sulfur, especially for sulfur-hungry crops such as canola, onions and brassicas, for rice, and on alkaline soils. It is also used to condition hard water in herbicide spray tanks, as the ammonia source for chloramination of drinking water, in fire retardants, in leather deliming and textile dyeing, as a fermentation nutrient and for protein precipitation in laboratories.
Is ammonium sulfate the same as ammonium sulphate?
Yes. Ammonium sulfate is the American spelling and ammonium sulphate the British spelling of the same compound, (NH4)2SO4, CAS 7783-20-2. The product, the HS code and the specification are the same whichever spelling an offer or contract uses.
How much nitrogen and sulfur does ammonium sulfate contain?
Pure ammonium sulfate contains 21.2% nitrogen and 24.3% sulfur by weight. Commercial fertilizer grades are normally guaranteed at about 20.5 to 21% nitrogen and 24% sulfur. All of the nitrogen is in ammonium form and all of the sulfur is sulfate, which plants can take up directly.
Is ammonium sulfate better than urea?
It depends on what the crop needs. Urea contains about 46% nitrogen, so it is usually cheaper per kilogram of nitrogen. Ammonium sulfate contains about 21% nitrogen plus 24% sulfur, loses less nitrogen as ammonia when left on the surface of most soils, and suits sulfur-deficient and alkaline soils. Many growers use both, often blended together.
Does ammonium sulfate lower soil pH?
Yes. Ammonium sulfate is the most acidifying of the common nitrogen fertilizers. Offsetting the acidity takes about 5.4 kg of calcium carbonate per kilogram of nitrogen applied, compared with about 1.8 kg for urea. This makes it useful on alkaline soils, while acidic soils need regular pH checks and liming.
Is ammonium sulfate good for lawns and grass?
Yes. It greens turf quickly because the nitrogen is already in ammonium form, and its sulfur and mild acidifying effect suit lawns on alkaline soils. To avoid leaf burn, spread it on dry grass at the recommended rate and water it in, and avoid applying it in very hot weather.
Can ammonium sulfate be mixed with other fertilizers?
Yes. Granular ammonium sulfate is commonly blended with urea, DAP, MAP and potash when the particle sizes match. It should not be mixed with lime or other strongly alkaline materials, because that releases ammonia gas and wastes nitrogen.
Why is ammonium sulfate added to herbicide spray tanks?
In hard water, calcium, magnesium and iron ions bind to some herbicides, glyphosate in particular, and reduce how well they work. Ammonium sulfate added to the tank ties up those ions so more of the herbicide stays active. For this use a fine or soluble grade is preferred so it dissolves completely.
Is ammonium sulfate hazardous?
Ammonium sulfate is a low-hazard substance. It is not regulated as dangerous goods for sea, road or air transport and ships as general cargo. Dust can irritate the eyes, skin and airways, so normal protection such as glasses, gloves and a dust mask is advised, and it must be kept away from strong alkalis, which release ammonia.
Is ammonium sulfate organic?
No. Ammonium sulfate is a synthetic mineral fertilizer and is listed as prohibited for certified organic crop production. Growers who are not certified organic can use it freely; certified organic growers should check with their certifier before using any nitrogen source.
What is the difference between granular and crystal ammonium sulfate?
Granular ammonium sulfate is sized, typically about 2 to 5 mm, so it spreads evenly and blends with other granular fertilizers without separating. Crystal ammonium sulfate is finer and dissolves faster, which suits direct application, fertigation, compound fertilizer production and most industrial uses. Granular usually costs more because of the extra granulation step.
What is the HS code for ammonium sulfate?
Ammonium sulfate is classified under HS code 3102.21 in the Harmonized System. Many countries add further digits to this code, so importers should confirm the full national tariff line with their customs broker before filing.
What is the minimum order and packing for bulk ammonium sulfate?
The minimum order is one full 20ft container. Packing options are 25 kg and 50 kg woven polypropylene bags with a polyethylene liner, or 1,000 kg jumbo bags. The net weight per container depends on the packing and the shipping line, and it is confirmed on each offer. Large tonnages can be quoted as break-bulk cargo.
What is the price of ammonium sulfate per ton?
Ammonium sulfate is quoted in US dollars per metric ton for a named grade, packing and Incoterm, so there is no single price. It follows the global nitrogen and sulfur markets and seasonal demand, and every offer carries a validity date. To compare offers fairly, divide the price per ton by 210 to get the cost per kilogram of nitrogen at 21% N, then compare landed cost to your own port.
How do I choose a reliable ammonium sulfate supplier?
Ask for an offer that names the grade and form, minimum nitrogen and sulfur, origin, packing, net weight per container, Incoterm and validity date. A reliable ammonium sulfate supplier sends a batch certificate of analysis with a lot number that matches the bags, provides the SDS and certificate of origin, and allows a sample or independent inspection before loading.
