10476-85-4 Usage
Description
Strontium chloride is the inorganic salt consisting of strontium and chloride. In organic synthesis, it can be used as the resource for the manufacturing of other kinds of strontium compound. Compared with the sulfide, it has the advantage of not reacting with oxygen and carbon dioxide, which facilitates industrial handling.
Strontium chloride hexahydrate is used in toothpastes for sensitive teeth.It can also be used to reduce the tooth sensitivity through covering the microscopic tubules in the dentin with nerve endings which has been exposed to gum recession. It can be further used as a red coloring agent in pyrotechnics. Recent study has also shown that a novel topical formulation containing strontium chloride can effectively reduce the intensity and duration of cowhage-induced itch. In biological research, it has been successfully used to induce activation of mouse oocytes in nuclear transfer and other experiments, which is important in understanding the mechanisms of fertilization and early embryonic development.
Strontium chloride is not classified as a dangerous material in transport regulations.
Chemical Properties
Different sources of media describe the Chemical Properties of 10476-85-4 differently. You can refer to the following data:
1. White crystalline powder
2. Strontium chloride, SrCl2 is a salt of strontium and chlorine. It is ionic and water-soluble. It is less toxic than barium chloride [CAS: 10361-37-2] BaCl2, though more toxic than calcium chloride CaCl2. It emits a bright red color when heated in a flame. Strontium chloride can be prepared from strontium hydroxide or strontium carbonate reacting with hydrochloric acid. It can also be prepared by the union of the elements, strontium and chlorine.
Physical properties
Strontium chloride has the formula SrCl2 and the
molecular weight of 247.43 g/cm3. It is a typical salt, forming neutral aqueous solutions.
Strontium chloride can be prepared by treating strontium hydroxide or strontium carbonate with hydrochloric acid:
Sr(OH)2＋ 2HCl→SrCl2＋ 2H2O
SrCO3＋ 2HCl→SrCl2＋ CO2＋H2O
Crystallization from a cold aqueous solution gives
the hexahydrate, SrCl2·6H2O. Dehydration of this
salt occurs in stages, commencing above 61°C and
ending at 320°C, where full dehydration occurs. The dihydrate, SrCl2·2H2O, is a metastable form before
the anhydrate begins to form at 200°C. The hydrates
formed in solution have one, two or six waters of
crystallization.
SrCl2·6H2O is a hexagonal system consisting of colorless
long-needle crystals. It loses four crystal waters of hydration at 61.4°C to form plate crystals of SrCl2·2H2O which become the monohydrate at 100°C and anhydrate at 200°C.
Another common hydrate, SrCl2·2H2O, is composed
of white, crystalline needles which have a sharp, bitter taste. It can be prepared by fusing SrCO3 with CaCl2 at high temperature and then extracting the melt with water. The solution is then concentrated and then crystallized to form SrCl2·6H2O, which is then dehydrated at 68°C to form the dihydrate.Anhydrous strontium chloride is a colorless crystal or a white powder with a molecular weight of 158.53 g/mol and a density of 3.05 g/cm3. Its melting point is 875°C and its boiling point is 1250°C. It is easily soluble
in water but slightly soluble in anhydrous alcohol and acetone. It is not soluble in liquid ammonia.
Uses
Different sources of media describe the Uses of 10476-85-4 differently. You can refer to the following data:
1. Strontium chloride is the precursor to other
compounds of strontium, such as yellow SrCrO4, which
is used as a corrosion inhibitor for aluminum. Strontium
chloride is the compound usually used as a red coloring
agent in fireworks. It imparts a much more intense red
color to the flames than other alternatives. It is employed
in small quantities in glass making and metallurgy. The
radioactive isotope, strontium-89, used for the treatment
of bone cancer. It is usually administered in the form of
strontium chloride. Seawater aquaria require small amounts of strontium chloride, which is consumed in
the production of the exoskeletons of certain planktons.
SrCl2 is useful in reducing tooth sensitivity by forming a barrier over microscopic tubules in the dentin-containing nerve endings that have become exposed by gum recession.
2. Radioactive agent.
3. Strontium chloride are white needles made by fusing calcium
chloride with sodium carbonate. It is soluble in water and
alcohol. Strontium chloride was a popular halide for making
collodion-chloride printing-out emulsions.
Definition
strontium chloride: A white compound, SrCl2. The anhydrous salt (cubic; r.d. 3.05; m.p. 872°C; b.p. 1250°C) can be prepared by passing chlorine over heated strontium. It is deliquescent and readily forms the hexahydrate, SrCl2·6H2O (r.d. 2.67).This can be made by neutralizing hydrochloric acid with strontium carbonate, oxide, or hydroxide. Strontium chloride is used for military flares.
Preparation
Strontium chloride is obtained by dissolving strontium carbonate in concentrated hydrochloric acid. The hexahydrate, SrCl2 · 6H2O [10025-70-4], is formed on crystallizing below 61℃. On dehydration, the hexahydrate dissolves in its water of crystallization at 61℃. After passing through the di- and monohydrate stages, strontium chloride becomes fully dehydrated at 320℃.
Brand name
Stronscan-85 (Abbott).
References
Papoiu, A. D., et al. "A novel topical formulation containing strontium chloride significantly reduces the intensity and duration of cowhage-induced itch." Acta dermato-venereologica 93.5(2013):520-6.
Minkoff, S, and S. Axelrod. "Efficacy of strontium chloride in dental hypersensitivity. " Journal of Periodontology 58.7(1987):470.
Joyce, James A. "Ornamental colored flame candle." US, US2481019. 1949.
Ma, S. F., et al. "Parthenogenetic activation of mouse oocytes by strontium chloride: a search for the best conditions. " Theriogenology 64.5(2005):1142-57.
Check Digit Verification of cas no
The CAS Registry Mumber 10476-85-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,0,4,7 and 6 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 10476-85:
(7*1)+(6*0)+(5*4)+(4*7)+(3*6)+(2*8)+(1*5)=94
94 % 10 = 4
So 10476-85-4 is a valid CAS Registry Number.
InChI:InChI=1/2ClH.Sr/h2*1H;/q;;+2/p-2
10476-85-4Relevant articles and documents
Theoretical and Experimental Study of the Crystal Structures, Lattice Vibrations, and Band Structures of Monazite-Type PbCrO4, PbSeO4, SrCrO4, and SrSeO4
Errandonea, Daniel,Muoz, Alfonso,Rodrguez-Hernndez, Placida,Proctor, John E.,Sapia, Fernando,Bettinelli, Marco
, p. 7524 - 7535 (2015)
The crystal structures, lattice vibrations, and electronic band structures of PbCrO4, PbSeO4, SrCrO4, and SrSeO4 were studied by ab initio calculations, Raman spectroscopy, X-ray diffraction, and optical-absorpt
Novel alkali earth borohydride Sr(BH4)2 and borohydride-chloride Sr(BH4)Cl
Ravnsbaek,Nickels,Cerny,Olesen,David,Edwards,Filinchuk,Jensen
, p. 10877 - 10885 (2013)
Two novel alkali earth borohydrides, Sr(BH4)2 and Sr(BH4)Cl, have been synthesized and investigated by in-situ synchrotron radiation powder X-ray diffraction (SR-PXD) and Raman spectroscopy. Strontium borohydride, Sr(BH4)2, was synthesized via a metathesis reaction between LiBH4 and SrCl2 by two complementary methods, i.e., solvent-mediated and mechanochemical synthesis, while Sr(BH4)Cl was obtained from mechanochemical synthesis, i.e., ball milling. Sr(BH4)2 crystallizes in the orthorhombic crystal system, a = 6.97833(9) A, b = 8.39651(11) A, and c = 7.55931(10) A (V = 442.927(10) A3) at RT with space group symmetry Pbcn. The compound crystallizes in α-PbO2 structure type and is built from half-occupied brucite-like layers of slightly distorted [Sr(BH4)6] octahedra stacked in the a-axis direction. Strontium borohydride chloride, Sr(BH4)Cl, is a stoichiometric, ordered compound, which also crystallizes in the orthorhombic crystal system, a = 10.8873(8) A, b = 4.6035(3) A, and c = 7.4398(6) A (V = 372.91(3) A3) at RT, with space group symmetry Pnma and structure type Sr(OH)2. Sr(BH4)Cl dissociates into Sr(BH4)2 and SrCl2 at ～170 C, while Sr(BH4)2 is found to decompose in multiple steps between 270 and 465 C with formation of several decomposition products, e.g., SrB 6. Furthermore, partly characterized new compounds are also reported here, e.g., a solvate of Sr(BH4)2 and two Li-Sr-BH 4 compounds.
Enthalpies of formation of strontium dichloride and of the strontium ion (Sr2+) in water and in 1 mol * dm-3 HCl, and an assessment of enthalpies of formation of alkaline-earth dichlorides
Morss, Lester R.,Williams, Clayton W.
, p. 279 - 286 (1983)
Measurements of the enthalpy of solution of SrCl2 in water and in 1 mol * dm-3 HCl solution lead to ΔHf0 (SrCl2, c, 298.15 K) = -(832.7 +/- 0.9) kJ * mol-1, and to ΔHf0 (Sr2+, aq, 298.15 K)
Strontium-copper selenite-chlorides: Synthesis and structural investigation
Berdonosov, Peter S.,Olenev, Andrei V.,Dolgikh, Valery A.
, p. 2368 - 2373 (2009)
Two new complex selenite-chlorides of strontium and copper Sr2Cu(SeO3)2Cl2 (I) and SrCu2(SeO3)2Cl2 (II) were obtained and characterized by X-ray diffraction technique,
Ion-Ion-Solvent Interactions in Solution. XI Spectroscopic Studies of Group 2 Perchlorates in Acetone
James, David W.,Cutler, Paul G.
, p. 149 - 158 (1986)
Solutions of Mg(ClO4)2 and Sr(ClO4)2 in acetone have been studied at various concentrations up to saturation by using infrared absorption, Raman scattering and multinuclear n.m.r. (1H, 13C, 17O, 25Mg, 35Cl).Solvation numbers of c. 4.5 (Mg2+) and c. 5.5 (Sr2+) were determined from component band analysis of the c. 800 cm-1 acetone band in the Raman spectra.The solvent shell about the Mg2+ had a high level of steric crowding.There was a small amount of solvent-shared ion-pair formation at all concentrations in solutions of Mg(ClO4)2 which showed little concentration dependence.In solutions of Sr(ClO4)2 there was evidence for the formation of both solvent-shared associated-ion species and ion-contact species.The solvent-shared species appeared to have two alternative configurations in one of which the anion was both polarized and highly hindered.There was a salt-promoted reaction in which the perchlorate was reduced to chloride and the solution darkened.This reaction prevented the use of Raman spectra to quantify the association equilibria.
