Arthritis means joint inflammation.. It causes pain and swelling in the body's joints, such as the knees or hips. There are many types of arthritis, but osteoarthritis is the most common. Also known as degenerative joint disease or age-related arthritis, osteoarthritis is more likely to develop as people get older.
Hydrogen cyanide (HCN), sometimes called prussic acid, is a chemical compound with the chemical formula HCN. It is a colorless, extremely poisonous and inflammable liquid that boils slightly above room temperature, at 25.6 Â°C (78.1 Â°F).
Richard. If memory serves me correctly (and at my age, if often doesn't) Potassium Ferricyanide (I don't know the difference between ferricyanide and cyanide) was used in tintype photography as well as in some print toners. of course tintype photography was late 19th to very early 20th Century. think the most used was potassium ferricyanide, a salt of potassium (duh!) and a complex of cyanide and ferric ions ([Fe(CN)6]-3). Ferricyanide in itself is not that dangerous if handled properly, but can liberate cyanide gas (HCN) under certain conditions. The latter is highly toxic.