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ProSid™ MI 700 | Propionic Acid

ProSid™ MI 700

Next generation of Propionic Acid

Perstop Winning Formulas

Preservation with ProSid™ MI 700 is effective for all types of whole and processed grains. The product will quickly and effectively kill all forms of mould & yeast and maintains the nutritional value at a higher level.

In addition to high preservative properties, ProSid™ MI 700 has a high energy value, contains glycerol esters of propionic acid that benefits you in the following ways:

  • Long lasting preservation throughout the storage period up to 12 months.
  • Maximum effect against all forms of mould, yeast and mycotoxin.
  • Safer to handle than Propionic Acid. Does not burn like straight Propionic Acid.
  • Is non-corrosive to machinery.
  • No ADR restrictions for transport.
  • Considerably less evaporation of the product in the air.

*Compared to pure propionic acid

Product supplied in accordance with the following:


So what is ProSid™ MI 700?

It is a 95% (66%+26%+2%+1%) active content with no added water (water content is a result of the of the esterification reaction process).

Product Composition

The diagram shows the composition of the active substances in
ProSid™ MI 700. The product is highly concentrated, making it very affordable.

Maximum Efficiency

With it's unique formulation, ProSid™ MI 700 is effective against mold and yeast growth for months longer than other products currently available.

Recover of ProSid™ MI 700 vs Propionic Acid. Pauly, 2012.

ProSid™ MI 700 is non corrosive to steel

What do our customers have to say?

"ProSid™ MI 700 is doing a great job for us and we are very very happy with it. We will not return to straight Propionic Acid" Billy Rae, Agricultural Contractor, using ProSid™ MI 700 for 4 years.

Warning - the post-CLP regulation changes

What is CLP?

The CLP regulation ("Classification, Labelling and Packaging") is a European Union regulation which aligns the European Union system of classification, labelling and packaging chemical substances and mixtures to the Globally Harmonised System (GHS). The CLP regulation adopts the United Nations' GHS on the classification and labelling of chemicals across all European Union countries, including the UK.

The mould inhibition landscape is experiencing some radical changes. Many end-user of propionic acid based mould inhibitors or preservatives will no longer be allowed to use the product that they have been working with in the past. On 1 June 2015 we will enter the last phase of CLP implementation. This reclassification of all preparations means that a high percentage of the mould inhibitors that are available on the market today will become classified as ADR Dangerous Goods with regard to transportation and corrosive with regard to handling of the products. Of course suppliers of acid-based preservatives haven't been sitting still since the new legislation was announced. Let's have a look at today's mold inhibitor landscape to shed some light on the situation and the alternatives that are available.

A common way to buffer propionic acid based mould inhibitors in the past was to use ammonia for buffering. Corrosion tests have shown that many ammonia buffered products will become ADR after the reclassification due to its corrosive effect on steel. Perstorp have developed a unique method to create a mould inhibitor that will still be considered non-Dangerous Goods and non-corrosive after 1 June 2015:

The glycerol ester method: mould inhibition at its finest - ProSid™ MI 700

Propionic acid is at the core of virtually every established mould inhibitor for grains in the market. Esterifying propionic acid with glycerol creates a molecule that is non-corrosive and that removes the pungent smell of propionic acid with great reliability. Glycerol esters of propionic acid have less evaporation compared to pure propionic acid. This ensures a long-lasting effect of the product in your grains during storage.

Prosid™ MI 700 is Perstorp's patented 'one of a kind' preservative for grain and feed that uses esterified propionic acid. This product has some of the best features available on the market and a density that is nearly the same as that of propionic acid, meaning that you can expect to dose the same litres without changing the settings on your dosage equipment.


Please click the links below to download the brochure and user guide.

Back to Grain Preservation


NB: In order for the silage additive to work, you must always follow the recommended dosage rates and ensure the dosing equipment is calibrated correctly prior to use. The use of silage additives cannot be expected to overcome adverse weather conditions, poor feeding-out procedures, incorrect dosing rates, poor compaction, poor or inadequate sealing and soil or slurry contamination and is therefore not warranted against these poor practises and conditions. If unsure of applications rates or methods, please seek advice.