At Sulvaris, we develop proprietary technologies that transform industrial co-products into agronomically and environmentally friendly fertilizer products.


Micronized Sulphur Technology®

A Revolutionary Sulphur Solution

The transformative power of Sulvaris®’ Micronized Sulphur Technology (MST®) unlocks the nutritional value of elemental sulphur within the growing season, without the risk of the sulphate form of sulphur moving below the root zone of the crop, making it unavailable and a potential polutant.

Addressing A Global Problem

The Critical Need for More Sulphur in Advanced Agriculture

Sulphur is essential for life on earth. As one of the fundamental “macronutrients,” including nitrogen (N), phosphorus (P) and potassium (K), sulphur has a key role in crop development and growth.

A growing problem: Sulphur levels have been declining for years, severely limiting crop production in many parts of the world.

Why does advanced agriculture need more sulphur?

Global grain and oilseed production is struggling to keep up with consumption, which has risen at an annualized rate of 2.2 percent over the past decade.

More growers are switching to sources with little or no sulphur– like urea of MAP. Because of this, less plant nutrient sulphur (PNS) is being applied through macronutrient sources.

Global industry has cut SO2, “greenhouse gas” emissions to reduce acid rain. While this is environmentally positive overall, it has also reduced regionally concentrated supplies of PNS.

Today’s high-performance seed hybrids require significantly more PNS, and they need it throughout the season to maximize yield potentials.

Micronized Sulphur Technology®

What is MST®?

Micronized Sulphur Technology (MST®) is a proprietary patented technology that micronizes sulphur to less than 7-microns, which is the smallest particle size economically produced on a commercial scale in the industry to date.

Smaller particle size distribution leads to an exponential increase in the surface area, which is essential for microbial oxidation to convert otherwise insoluble sulphur into a soluble nutrient form available for plant uptake.

Elemental sulphur oxidation rates are temperature-dependent, so the MST® component will transform to sulphate as soils warm through the summer months.

In locations of high precipitation, the MST® component will not leach from soils in high rainfall events until it is transformed to sulphate by soil microorganisms. This increases the sulphur available in the root zone.

Quick and prolonged sulphur oxidation for season long availability.

Traditional Elemental Sulphur Products

Range: 500 µm

Competing Elemental Sulphur Products

Range: 100 µm

Micronized Sulphur Technology (MST®)

Range 50 µm

MST® fertilizers are safe to produce and distribute

The production process results in homogenous product contains MST® particles uniformly dispersed throughout each granule.

Minimal to no enrichment has been experienced in production and handling facilities, substantially reducing the safety risk associated with sulphur dust.

Production of MST®

Simple, Safe, Single-Step micronization process

The process uses a liquid as the medium for micronization, forming a safe environment

No chemical reactions

Low temperature, low-pressure process

No exotic metallurgy required

Average particle size < 7 microns

Sulphur concentration in dry products of up to 20%

Proven technology, operating plant at Nutrien’s White Springs Florida plant

Quick and easy start-up and shutdown

Easy “bolt-on” integration into existing fertilizer production facilities

Virtually non-intrusive and no downtime production loss during construction

Low capital and operating costs, with a small footprint

The 3D Model of a Modular MST® facility shown reflects a typical design and size of the MST® process with capacity of 50 KMT of sulphur per year.

The configuration shown is a representative size. The actual size may vary depending on local conditions and product selection. Configuration shown is 15.5m by 7m.

MST® Technology can be added to all primary nutrient fertilizers

Patented economical process for producing high-value micronized Sulphur from low- value elemental Sulphur

Average particle size < 7 microns (average can be controlled)

Can be integrated into existing NPK fertilizer (Nitrogen, Phosphorus, and Potassium Fertilizer) products/operations

Other commercial opportunities in fungicides, feed, rubber & latex, paints & inks


Carbon Ammonium Phosphate

A revolutionary carbon-based, ammonium phosphate product

  • Sulvaris seeks to improve N and P use efficiency with a structural carbon enhanced efficiency carrier by pursuing the development of a new proprietary product, CCT-AP
  • Global use efficiency of P fertilizers is currently only ~10-15% in the year of application, far lower than that of N and K(1)
  • P deficiencies can be found in nearly 67% (14.1B acres) of global land designated for crop production(2)
  • CCT-AP product development targets:
    • a source of enhanced efficiency nitrogen and phosphate,
    • an agronomic source of soil organic carbon,
    • a low-CAPEX, accretive investment as a bolt-on unit for existing commercial-scale phosphoric acid/MAP/DAP production facilities


Carbon Ammonium Sulphate

A revolutionary carbon-based, ammonium sulphate product

  • CCT-AS is a carbon-based granular fertilizer developed by Sulvaris
    • Carbon content 5 – 15%
  • Potential source of enhanced efficiency nitrogen; shown to increase yields
  • Delivers nutrients in carbon matrix form – contributing to Soil Organic Carbon
  • Feedstock includes biomass, ammonia, and sulphuric acid
  • In addition to being a unique, high-value source of crop nutrients, CCT-AS provides an outlet for wood waste or other carbon-based waste streams
  • CCT transforms inexpensive waste feedstock into high analysis fertilizer
    • Potential reduction of soil N2O emissions
    • Potential reduction of soil CH4 emissions
    • Generates CO2 credits

19% N, 22% S, 15% C (19-0-0-22S-15C)

SGN: 290-320 (2.9-3.2mm)

Uniformity index > 60

Crushing strength > 4.5 kg (10lb)

HIGH RTA and LOW dust

Flexible process allows for alteration of nutrient analysis and carbon content, as well as the addition of micronutrients


A Broad Acre Potash and Sulphur Fertilizer

  • 0-0-49-15S product available with up to 15% sulphur
  • Being a mixture of Potash and elemental sulphur (MST®), Potash MST® offers a multitude of benefits for growers, from improved handling characteristics to strong agronomic performance.
  • With an analysis of 0-0-49-15s, Potash MST® meets the majority of sulphur application requirements without the need for additional sulphur.
  • Once applied to the soil, Potash MST® has excellent dispersal of the MST® component.
  • Differentiate your potash portfolio with a value-added product.

Potash MST® ​granules produced at IFDC

A brand-new potash fertilizer containing micronized sulphur

Traditional Elemental Sulphur Products

 (75-2000 micron size avg 960)

Specialty Products with Elemental Sulphur

(50-200 micron size avg 150)

Sulvaris MST® Particle Size

(1-12 micron size avg 7)

Phosphate MST®

A broad acre phosphate fertilizer containing micronized elemental Sulphur

  • MAP MST® nutrient formulation is 9-43-0-16S (15% MST®)
  • In research trials in North America Phosphate MST® has equal to or greater yield responses than ammonium sulphate.
  • MST® provides three essential plant nutrients (NPS) together within each granule of phosphate MST® for uniform distribution across the field.
  • Phosphate MST® has enhanced blending characteristics over AS and exhibits less caking due to the hydrophobic nature of elemental sulphur.
  • Non-combustible product (confirmed by 3rd party testing lab).
  • Granule hardness, storage and handling properties identical to MAP.

Phos MST® has all three nutrients evenly dispersed through every granule

Traditional Elemental Sulphur Products

 (75-2000 micron size avg 960)

Specialty Products with Elemental Sulphur

(50-200 micron size avg 150)

Sulvaris MST® Particle Size

(1-12 micron size avg 7)


A broad acre fertilizer containing micronized elemental Sulphur and Urea

  • Product available with up to 15% Sulphur 
  • Urea MST® (39-0-0-15S)
  • The sulphur component in Urea MST®  can be adjusted from 5 to 15% depending on marketing requirements.
  • The MST® Unit is a “bolt-on” side skid that easily integrates into existing drum granulation Urea production facilities. Integration into Prilling process is under development.
  • Virtually non-intrusive process, requires no modifications to existing plant and equipment. 
  • Virtually no production loss due to downtime during construction phase.
  • Sulphur is hydrophobic and repels moisture. MST® in the Urea granule improves storage properties, blending and application uniformity. 

A brand-new Urea fertilizer containing micronized sulphur

Traditional Elemental Sulphur Products

 (75-2000 micron size avg 960)

Specialty Products with Elemental Sulphur

(50-200 micron size avg 150)

Sulvaris MST® Particle Size

(1-12 micron size avg 7)

Liquid MST®

A broad acre liquid fertilizer containing micronized elemental Sulphur

  • Product available with up to 5% Nitrogen in the form of UAN
  • Liquid MST® (0-0-0-50S)
  • Liquid MST® (5-0-0-38S)
  • Product including UAN has a lower freeze point of -11 degC
  • Freeze / thaw cycles have no change in the product quality
  • Suitable for use with common liquid fertilizer equipment
  • A comprehensive product handling guide has been developed for Liquid MST® including the following:
  • Practical and effective equipment cleaning protocol
  • Recommended storage, handling and application best practices

Traditional Elemental Sulphur Products

 (75-2000 micron size avg 960)

Specialty Products with Elemental Sulphur

(50-200 micron size avg 150)

Sulvaris MST® Particle Size

(1-12 micron size avg 7)


On average, Liquid MST® has provided greater yield responses than ammonium thiosulfate across all site-years studied.

The sulphur in MST® is immobile in the soil until it is oxidized to sulphate.  Liquid MST® has less leaching than ATS and can be readily integrated into fall and early spring applications.

Liquid MST® does not have a high salt or nitrogen component that can damage germinating seeds, or foliage.

This is a high analysis sulphur product, meaning a lower volume of product is required to achieve sulphur requirements.

Liquid MST® is suitable for side dress applications.

Liquid MST® has a lower carbon footprint than tradition sulphur products such as ATS or AS.

Liquid MST® allows all of the crop’s sulphur requirements to be provided from one source, creating an opportunity to choose an environmentally responsible N source.