18480-07-4 Usage
Description
Strontium hydroxide is a chemical compound with the formula Sr(OH)2, consisting of a strontium cation (Sr2+) and two hydroxide anions (OH-). It occurs as an anhydrate with prismatic, colorless, and deliquescent crystals. Strontium hydroxide is slightly soluble in water, but its octahydrate form is much more soluble and is the one commonly supplied for various applications. When heated, the octahydrate loses its water molecules, forming the monohydrate and eventually the oxide. It is a colorless, deliquescent substance with a density of 3.625 g/cm3, melting at 375°C in a hydrogen atmosphere and converting to oxide at 710°C. The octahydrate consists of colorless, tetragonal, deliquescent crystals with a density of 1.90 g/cm3. Its aqueous solution is highly alkaline, and it is soluble in acids and ammonium chloride solution but insoluble in acetone.
Uses
1. Sugar Extraction Industry:
Strontium hydroxide is used as a clarifying agent for the extraction of sugar from beet sugar molasses. It helps in the purification process by removing impurities and facilitating the crystallization of sugar.
2. Soap and Detergent Industry:
Strontium hydroxide is used in the production of lubricant soaps and greases, providing a smooth texture and improved lubricating properties.
3. Plastics Industry:
Strontium hydroxide serves as a stabilizer in the manufacturing of plastics, enhancing their durability and resistance to degradation.
4. Glass and Adhesives Industry:
It is also used as a stabilizer in the production of glass and adhesives, improving their overall quality and performance.
5. Lubricants Industry:
Strontium hydroxide is used in the formulation of lubricants that can withstand extreme temperatures, either high or low, providing better performance in various industrial applications.
6. Carbon Dioxide Absorption:
Strontium hydroxide has the ability to absorb carbon dioxide from the air, forming strontium carbonate. This property makes it useful in applications where carbon dioxide removal or absorption is required.
Toxicity
Dry compound or aqueous solution is corrosive. Contact with skin or eyes can cause irritation.
Preparation
Preparation Strontium hydroxide is prepared by treating strontium oxide with water: SrO + H2O → Sr(OH)2 Alternatively, Sr(OH)2 is made by heating strontium carbonate or strontium sulfide with steam at temperatures around 500 to 600°C: SrCO3 + H2O → Sr(OH)2 + CO2 SrS + 2H2O → Sr(OH)2 + H2S.
Flammability and Explosibility
Notclassified
Check Digit Verification of cas no
The CAS Registry Mumber 18480-07-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,4,8 and 0 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 18480-07:
(7*1)+(6*8)+(5*4)+(4*8)+(3*0)+(2*0)+(1*7)=114
114 % 10 = 4
So 18480-07-4 is a valid CAS Registry Number.
InChI:InChI=1/H2O.Sr/h1H2;/q;+2
18480-07-4Relevant articles and documents
Kinetic investigation of the reaction Sr(1S) + O2 + He in the temperature range from 303 to 968 K
Vinckier,Helaers
, p. 8333 - 8338 (1998)
A kinetic study of the third-order recombination reaction Sr(1S) + O2 + He k1(He)→ SrO2 + He has been carried out in a fast-flow reactor in the temperature and pressure range of respectively 303-968 K and 6-12 Torr. Strontium atoms were generated by thermal evaporation of strontium metal pellets and then monitored by atomic absorption spectroscopy (AAS). The Arrhenius plot shows a departure from linearity above 500 K. The modified Arrhenius expression taking into account a temperature dependence of the preexponential factor for the entire temperature range results in the expression k1Sr(He) = [(1.9 ± 0.3) × 10-23]T-1.7 exp-[(-12.1 ± 0.8 kJ mol-1)/RT] cm6 molecule-2 s-1. The best representation of the temperature dependence is given by the polynomial fit log k1Sr(He) = -60.83 + 22.44(log T) - 3.89(log T)2. A lower limit to the bond energy of the SrO2(3A2) reaction product is estimated by means of the method based on the expression of the equilibrium constant and the theory of statistical mechanics. A value of D0 > 244 kJ mol-1 was obtained, which is in the range of the values derived from ab initio calculations.
