➤ Contained in nucleic acids, ATP, bone and dental tissue, enzymes, maintains acid-base balance, participates in the functioning of muscle fibers and preservation of hereditary material, maintains K, Na levels.

➤ Included in the structures of brain tissue (Hensing, 1715), in bones (J. Hahn, 1769 and K. Scheele, 1791), neurons.

➤ Causes nephritis, cardiovascular diseases, hyperphosphatemia,

demineralization of bone tissue, osteoporosis, anemia, leukopenia, and increases the likelihood of a heart attack.

➤ Hypophosphatemia manifests itself in the following symptoms: osalgia, osteoporosis, rickets, increased apathy and exhaustion, amnesia, disability, limb tremors, intermittent breathing, tooth gap, and slow epidermal regeneration.

➤ C₃H₇CaO₆P (Calcium glycerophosphate) - 0.2-0.5 g: general tonic; treatment of rickets.

➤ ​Ca₂(OH)PO₄ - in case of bone and dental pathology.

➤ ATP - 1% solution 1-2 r/d, enhances heart muscle contraction.

➤ ​H₃PO₄ and its salts are part of filling mixtures; silicophosphate, barium phosphate and zinc phosphate cements used in dentistry.

➤ Calcium phosphates are used for the treatment and prevention of calcium and phosphorus deficiency in the body, in muscular dystrophy, prolonged cardiopathy, for diagnostic examination and treatment of metastases.

➤ Common in the form of phosphorus additives.

➤ Used in crystal therapy and homeopathy.

➤ Inhalation of high concentrations of Phosphorus and its oxides affects the nervous, cardiovascular and bone systems and the musculoskeletal system.

➤ White phosphorus is extremely toxic - it causes burns on the skin, dissolves well in membrane lipids, and penetrates deeply into the body.

➤ It disrupts mineral metabolism and causes bone hypophosphatemia.

➤ Antidote: -

➤ In the twelfth century, Arab chemists obtained phosphorus from urine.

➤ The human body contains 1.5 kg of phosphorus.

➤ Allotropic modifications: white or yellow phosphorus (G. Brand 1669), red (Schroeter 1847), black phosphorus (P. Bridgman 1934).

➤ PH₃ is a poisonous gas with a garlic odor.

➤ Phosphonitrile chlorides - "carbohydrate-free" rubber.