Calcium tartrate is white crystalline powder, easily soluble in diluted hydrochloride acid and slightly soluble in acetic acid. It is stemmed from the extraction and processing of potassium bitartrate contained in grape marc and in lees of wine. Pulverulent product, dried for a good preservation, it counts more than 50 % of tartaric acid. Calcium citrate is known to be an effective retarder, but the relatively much lower solubility of calcium tartrate precludes its use in the form of an aqueous solution. However, calcium tartrate dissolves in dilute alkalis, with possibly the formation of the complex ion [Ca(C4H4O6)2]=. Such solutions are effective retarders. Apart from this Shreenath Chemicals also manufacture Active Pharma Ingredients, Pharmaceutical Raw Materials, Bulk Drug, Nutritional Supplements, Drug Intermediates, Fine Chemicals, Choline Salts, Ferric Ammonium Citrate, and Calcium Citrate.