➤ It plays an important role in osteogenesis.

➤ It is considered an analog of calcium (Ca and Sr have the same adsorption sites).

➤ It is characterized by the ability to be deposited in bone tissue and tooth crown enamel.

➤ The average content of Sr in the human body is about 0.002%.

➤ The daily allowance is 1 to 5 mcg/kg. Accumulation of excess leads to:

➤ Urey's disease or strontium rickets;

➤ Pulmonary fibrosis;

➤ bone problems;

➤ Increased risk of metastasis;

➤ Heart rhythm disorders;

➤ Diseases of the urinary system.

➤ Leads to the development of osteoporosis.

➤ Destruction of hard tooth tissues (enamel, dentin) is observed.

➤ Impaired functioning of the cardiovascular system.

➤ C₁₂H₆N₂O₈SSr (Strontium ranelate) - 1.2 g/day - delays the destruction of cartilage in the knee joint

➤ ⁹⁰Sr - in radiotherapy.

➤ Wide range of applications ⁹⁰Sr is widely used in radiotherapy to treat diseases of the visual organ (tumors) by application, as well as superficial epidermal lesions (capillary angiomas, hyperkeratoses, Bowen's disease, erosions, leukoplakia).

➤ Treatment of osteomas.

➤ To normalize the body's energy balance, a Bianchi acupuncture bracelet is used, which contains strontium compounds.

➤ Leads to myelotoxicity, resulting in the development of chronic radiation sickness.

➤ In case of bone damage (replaces Ca), radiogenic osteosarcoma occurs;

➤ Causes the development of leukemia.

➤ Destroys the structure of nucleic acids (DNA) - impact on genotype and heredity.

➤ It enters the body through inhalation of radioactive dust, as well as through drinking water and food.

➤ There is no specific antidote.

➤ Sr compounds burn with a carmine-red flame.

➤ Sugar was extracted from molasses using Sr dichasarate (C H₂₂O₄ * 2SrO).

➤ ⁹⁰Sr emits β-rays (electrons).

➤ ⁹⁰Sr is an isotopic indicator that has been used to determine where it is localised and how it participates in metabolism. The skeleton of radiolarians (marine organisms) consists only of SrSO₄ .

➤ 1 kg of SrO is consumed for each colour TV set.