What Is Strontium Chloride?
Strontium chloride is a kind of inorganic salt. It is the most common strontium salt. Its aqueous solution is weakly acidic (due to the weak hydrolysis of Sr2 +). Similar to other strontium compounds, strontium chloride is red under the flame, so it is used for manufacturing. Red sparkler. Its chemical properties are between barium chloride (more toxic) and calcium chloride. [1]
- Chinese name
- Strontium chloride
- Foreign name
- Strontium chloride
- Chemical formula
- SrCl2
- Molecular weight
- 158.53
- Chemical category
- Inorganic matter--salt--strontium salt
- Regulation type
- Unregulated
- CAS number
- 10476-85-4
- EINECS number
- 231-201-3
- Melting point
- 874 ° C (lit.)
- Boiling point
- 1250 ° C
- Density
- 3.052g / cm³
- Strontium chloride is a kind of inorganic salt. It is the most common strontium salt. Its aqueous solution is weakly acidic (due to the weak hydrolysis of Sr2 +). Similar to other strontium compounds, strontium chloride is red under the flame, so it is used for manufacturing. Red sparkler. Its chemical properties are between barium chloride (more toxic) and calcium chloride. [1]
Physical and Chemical Properties of Strontium Chloride
Strontium chloride physical properties
- Colorless cubic crystal.
- Solubility: easily soluble in water (soluble in 0.8 parts of water and 0.5 parts of boiling water), solubility (hexahydrate) 106.2g / 100ml water (25 ° C), slightly soluble in ethanol, acetone, insoluble in carbon tetrachloride ammonia. [2] Easy deliquescent in the air. Hydrates have 1, 2, 6 crystal water, lose 4 crystal water at 61.4 ° C, become monohydrate at 100 ° C, and become anhydrous at 200 ° C.
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Strontium chloride chemical properties
- Strontium chloride is an ionic compound that is completely ionized into Sr2 + and Cl- in water
- SrCl 2 ==== Sr 2+ + 2Cl-
- Chemical properties are similar to BaCl 2 but less toxic, for example:
- SrCl 2 + 2AgNO 3 ==== 2AgCl + Sr (NO 3 ) 2
- SrCl 2 + K 2 SO 4 ==== SrSO 4 + 2KCl
- LD50: 147.6mg / kg (mouse intravenous injection) [1]
Preparation method of strontium chloride
- Strontium chloride can be prepared by adding strontium hydroxide or strontium carbonate to hydrochloric acid:
- Sr (OH) 2 + 2 HCl SrCl 2 + 2 H 2 O
- The aqueous solution was cooled to obtain crystalline hexahydrate SrCl 2 · 6H 2 O. This salt usually dehydrates at about 61 ° C and completely dehydrates at 320 ° C. [1]
Main uses of strontium chloride
- It is a precursor to other strontium compounds, such as strontium chromate. It is used as a corrosion inhibitor for aluminum. Chromate ions are similar to sulfate ions, and their corresponding precipitation reactions are similar:
- SrCl 2 + Na 2 CrO 4 SrCrO 4 + 2 NaCl
- Strontium chloride is occasionally used as a red colorant for pyrotechnics. Small amounts of strontium chloride are also added in glass manufacturing and metallurgy. The radioisotope strontium-89 is used to treat bone cancer and is usually operated in the form of strontium chloride. Seawater aquariums require small amounts of strontium chloride to provide exo skeletons for certain plankton. It can also be used in the manufacture of pyrotechnics, fluxes for electrolytic sodium metal, and catalysts for organic synthesis.
Strontium chloride safety protection
- The toxicity of strontium chloride is less than that of barium chloride, which is a low-toxicity and slightly irritating. Avoid dust coming into contact with eyes and mouth, and avoid inhalation.
- In case of contact with eyes, rinse immediately with plenty of water for at least 15 minutes and seek medical attention. [2]