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Cobalticyanide paper (Rinnmann's test for Zn) can be used as a chemical indicator for zinc. 4 g of K 3 Co(CN) 6 and 1 g of KClO 3 is dissolved on 100 ml of water. Paper is dipped in the solution and dried at 100 °C. One drop of the sample is dropped onto the dry paper and heated.
The trihydrate salt is obtained as a reddish-brown precipitate by adding two equivalents of potassium cyanide to a cobalt salt solution: [3]. CoCl 2 (H 2 O) 6 + 2 KCN → Co(CN) 2 + 2 KCl + 6 H 2 O
Zinc is an essential mineral in people as well as other animals. [4] The medical use of zinc sulfate began as early as the 1600s. [5] It is on the World Health Organization's List of Essential Medicines. [6] Zinc sulfate is available as a generic medication. [7] and over the counter. [1] [3]
The ZINC database (recursive acronym: ZINC is not commercial) is a curated collection of commercially available chemical compounds prepared especially for virtual screening. ZINC is used by investigators (generally people with training as biologists or chemists ) in pharmaceutical companies , biotechnology companies , and research universities .
Zinc gluconate 50 mg tablets (GNC brand) Zinc supplements (frequently zinc acetate or zinc gluconate lozenges) are a group of dietary supplements that are commonly used in an attempt to treat the common cold. [1] Evidence suggests that zinc does not prevent colds but may reduce their duration, with minimal or no impact on symptom severity.
For commercial applications, some effort is made to avoid halide impurities by using acetate salts of zinc: [5] [6] Zn(CH 3 COO) 2 + HCN → Zn(CN) 2 + 2 CH 3 COOH. Zinc cyanide is also produced as a byproduct of certain gold extraction methods. Procedures to isolate gold from aqueous gold cyanide sometimes call for the addition of zinc: