Ferric subsulfate solution

Ferric subsulfate solution is a styptic or haemostatic agent used after superficial skin biopsies. Ferric subsulfate solution is also known as Basic Ferric Sulfate Solution or Monsel's Solution. It has a recognised formula published in United States Pharmacopeia 29.

Active ingredients

Ferric subsulfate solution is prepared from ferrous sulfate, sulfuric acid and nitric acid.

It contains, in each 100 mL, basic ferric sulfate equivalent to not less than 20g and not more than 22g of iron.


Ferric subsulfate solution should be stored in airtight containers at a temperature above 22 degrees Celsius. Crystallisation may occur at temperatures below 22 degrees. Warming the solution may redissolve the crystals. The solution should be protected from light.


AstrinGyn by CooperSurgical is a thickened and specially modified gel formulation.

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