Strontium chloride

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Crystal structure
Crystal structure of strontium chloride
__ Sr 2+      __ Cl -
General
Surname Strontium chloride
other names

STRONTIUM CHLORIDE ( INCI )

Ratio formula SrCl 2
Brief description

colorless to white, odorless powder

External identifiers / databases
CAS number
  • 10476-85-4 (anhydrous)
  • 10025-70-4 (hexahydrate)
EC number 233-971-6
ECHA InfoCard 100.030.870
PubChem 5362485
ChemSpider 55440
DrugBank DB13987
Wikidata Q411859
Drug information
ATC code

V10 BX01

properties
Molar mass
  • 158.52 g mol −1 (anhydrous)
  • 266.62 g mol −1 (hexahydrate)
Physical state

firmly

density

1.95 g cm −3 (hexahydrate)

Melting point
  • 873 ° C (anhydrous)
  • 61 ° C (hexahydrate)
boiling point

1250 ° C

solubility
  • very easily soluble in water: 1062 g l −1 (0 ° C)
  • readily soluble in DMSO (100 g l −1 at 25 ° C) as a dihydrate
safety instructions
Please note the exemption from the labeling requirement for drugs, medical devices, cosmetics, food and animal feed
GHS labeling of hazardous substances
05 - Corrosive 07 - Warning

danger

H and P phrases H: 315-318-335
P: 261-280-305 + 351 + 338
Toxicological data

2250 mg kg −1 ( LD 50 ,  rat ,  oral )

As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Strontium chloride is a salt of strontium . It has the formula SrCl 2 and belongs to the group of chlorides .

properties

Strontium chloride forms colorless crystals. These are hygroscopic and form a hexahydrate , the crystals of which are colorless and translucent. Strontium chloride weathers in dry air and gives off its water of crystallization above 60 ° C, so that it melts anhydrous at 873 ° C. The solution of strontium chloride in water has a pungent and bitter taste.

Manufacturing

Strontium chloride is obtained from the minerals cölestin or strontianite using hydrochloric acid (HCl). The strontium carbonate obtained from cölestin via intermediate steps or contained as the main component in strontianite reacts with the hydrochloric acid to form strontium chloride and carbonic acid , which in turn breaks down into carbon dioxide and water :

use

Strontium chloride is mainly used in pyrotechnics to color fireworks red. It is also used as an additive in the glass industry and in metallurgy .

As strontium chloride hexahydrate (SrCl 2 • 6H 2 O) , it is used in laboratory technology for the detection of other strontium compounds and in atomic absorption spectroscopy and in medicine. In some dental care products (e.g. Sensodyne Classic) it is intended to prevent periodontitis and reduce the sensitivity of the tooth necks to pain. In homeopathy it is used for similar purposes in a highly diluted form as Strontium chloratum . As a weakly radioactive isotope compound 89-strontium chloride , it is also used in cancer therapy for the treatment of pain in bone cancer when hormone therapy no longer works in advanced metastases ( radionuclide therapy ).

Strontium chloride hexahydrate is also used in seawater aquariums to provide a sufficient supply of strontium as a skeletal component of some coral species. The strontium chloride is extracted from the water , especially by hard corals, and must therefore be topped up. However, it should be noted that strontium is highly toxic to some marine life (such as crabs).

Individual evidence

  1. ↑ entry to STRONTIUM CHLORIDE in CosIng database of the European Commission, accessed May 4, 2020th
  2. ↑ a b c d e f g h i Entry for CAS no. 10476-85-4 in the GESTIS substance database of the IFA , accessed on April 6, 2016 (JavaScript required)
  3. ↑ Strontium chloride data sheet from AlfaAesar, accessed on April 01, 2020 ( PDF )(JavaScript required) .
  4. ↑ a b Strontium chloride data sheet from AlfaAesar, accessed on March 14, 2010 ( PDF )(JavaScript required) .
  5. ↑ Dimethyl Sulfoxide (DMSO) Solubility Data. Gaylord Chemical Company, LLC; Bulletin 102, June 2014, p. 14. (PDF)
  6. ↑ Robert Jay Goldstein: Marine Reef Aquarium Handbook . Barron's Educational Series, 2007, ISBN 0-7641-3674-7 , pp. 24 ( limited preview in Google Book search).
  7. ^ Sven Gehrmann: The fauna of the North Sea: Lower animals. Mollusks, moss animals, cnidarians ... BoD - Books on Demand, 2010, ISBN 3-9812553-2-1 , p. 125 ( limited preview in Google Book Search).
  8. ↑ Aquarist Magazine and Blog: Aquarium Chemistry: Strontium and the Reef Aquarium - Advanced Aquarist | Aquarist Magazine and Blog , accessed May 12, 2014

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