Sodium Hexametaphosphate

What is Calgon GH?

Sodium hexametaphosphate(SHMP chemical) of commerce is typically a mixture of polymeric metaphosphates, of which the hexamer is one. It is more correctly termed sodium polymetaphosphate, which is prepared by melting monosodium orthophosphate and cooling it rapidly then. SHMP can hydrolyze into sodium trimetaphosphate and sodium orthophosphate in aqueous solution, especially under acidic conditions.


Industrial grade

Food grade

Total phosphate, as P2O5 % ≥



Inactive phosphate, as P2O5 % ≤



Iron, as Fe % ≤



Ph value (1% solution) % ≤



Water insoluble % ≤



Heavy metals, as Pb % ≤



Arsenic, as As % ≤



Fluoride as F % ≤



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Sodium hexametaphosphate is an excellent soft water agent. It must be added in the configuration of color developer in order to reduce the hardness of water, prevent the formation of calcareous texture, ensure clear and bright color. Meanwhile, it have no effect on the oxidation and reduction of the developer

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Detergents & Water Treatment

It can prevent the iron and manganese dissolved in the water from redening and blackening due to oxidation. And prevent the precipitation of calcium and magnesium ions to form scale and reduce the heat transfer efficiency at the same time.
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Food Industry

It can improve water holding capacity, increase caking and prevent fat oxidation when used in meat products, fish sausage, ham, etc… Used for bean paste and soy sauce to prevent discoloration, increase viscosity, shorten the vinegar period and adjust the taste.
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Adding some additives to sodium hexametaphosphate to repair the steel-making converter at a certain temperature and pressure can greatly extend the life of the converter. The integration of SHMP and divalent metal ions in solution can form a positively charged polyelectrolyte, which forms a dense, continuous films when it is adsorbed on the metal surface. The film can completely cover the corrosion micro-battery, reduce or prevent the corrosion current from passing to play a role of corrosion protection.
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Fiber Industry

It can suppress the formation of metal soap in the refining process, make the colloid in the raw cotton easy to remove and improve the refining efficiency. In the bleaching process, it can prevent the decomposition of hydrogen peroxide, reduce the loss of bleach and improve the bleaching efficiency. In the dyeing, it can prevent the color of the dyed substance from changing, maintain the original color of the dye, prevent the occurrence of dyeing stains, poor feel, white cloth yellowing and fiber strength reduction.
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Paper-Making Industry

The mixture of SHMP chemical and sulfonated benzaldehyde can be used as a dispersant for steel paper coatings to disperse lead carbonate pigments.

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Shanghai, China.

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