Calcium chloride is an inorganic compound, a salt with the chemical formula CaCl2. It is a white crystalline solid at room temperature, and it is highly soluble in water. It can be created by neutralising hydrochloric acid with calcium hydroxide. Calcium chloride is commonly encountered as a hydrated solid with generic formula CaCl2·nH2O, where n = 0, 1, 2, 4, and 6. These compounds are mainly used for de-icing and dust control. Because the anhydrous salt is hydroscopic and deliquescent, it is used as a desiccant. Uses
De-icing and freezing-point depression
By depressing the freezing point of water, calcium chloride is used to prevent ice formation and is used to de-ice. This application consumes the greatest amount of calcium chloride. Calcium chloride is relatively harmless to plants and soil. As a deicing agent, it is much more effective at lower temperatures than sodium chloride. When distributed for this use, it usually takes the form of small, white spheres a few millimeters in diameter, called prills. Solutions of calcium chloride can prevent freezing at temperatures as low as −52 °C (−62 °F), making it ideal for filling agricultural implement tires as a liquid ballast, aiding traction in cold climates.It is also used in domestic and industrial chemical air dehumidifiers. Road surfacing
The second largest application of calcium chloride exploits its hygroscopic nature and the tackiness of its hydrates; calcium chloride is highly hygroscopic and its hydration is an exothermic process. A concentrated solution keeps a liquid layer on the surface of dirt roads, which suppresses the formation of dust.
However, DMD is named after the French neurologist Guillaume-Benjamin-Amand Duchenne (1806–1875), who in the 1861 edition of his book Paraplegie hypertrophique de lenfance de cause cerebrale, described and detailed the case of a boy who had this condition. A year later, he presented photos of his patient in his Album de photographies pathologiques. In 1868, he gave an account of 13 other affected children. Duchenne was the first to do a biopsy to obtain tissue from a living patient for microscopic examination. Notable cases
Alfredo ("Dino", "Alfredino") Ferrari (born January 1932 in Modena), the son of Enzo Ferrari, designed the 1.5 L DOHC V6 engine for the model F2 at the end of 1955. But Dino never saw the engine produced:  he died on 30 June 1956 in Modena at the age of 24, before his namesakes Dino and Fiat Dino were made.Rapper Darius Weems had the disease and used his notoriety to raise awareness and funds for treatment. He died at the age of 27 (his brother also had the disease, until his death at the age of 19). The film Darius Goes West documents Weemss journey of growth and acceptance of having the disease.Jonathan Evisons novel, The Revised Fundamentals of Caregiving, published in 2012, depicted a young man affected by the disease. In 2016, Netflix released The Fundamentals of Caring, a film based on the novel.