Marchi's chemical activity is concentrated in the factory of Marano Veneziano where two plants for the production of potassium sulphate and of hydrochloridric acid were created: a plant for the production of sulphur acid from elementary sulphur, obtained through a modern contact catalytic process and a plant for the production of high purity sulphuric acid: the "reagent grade". Together with these plants there are also four lines producing,a coalescent for water treatment and clarification, called FLOMAR, one line for the production of granulate intermediate and one authomatic line for the packing of electrolyte for lead-acid storage batteries.
The factory covers an area of 140,000 mq out of which 70,000 are destined to production.