Strontium hydroxide

Strontium hydroxide
Identifiers
CAS Number	18480-07-4 ; 1311-10-0 (octahydrate) ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:35105 ;
ChemSpider	79094 ;
ECHA InfoCard	100.038.501
EC Number	242-367-1;
Gmelin Reference	847042
PubChem CID	87672;
UNII	EPK818UET5 ; T2B33T08R4 (octahydrate) ;
CompTox Dashboard (EPA)	DTXSID60893975 ;
	InChI InChI=1S/2H2O.Sr/h21H2;/q;;+2/p-2 Key: UUCCCPNEFXQJEL-UHFFFAOYSA-L ; InChI=1/2H2O.Sr/h21H2;/q;;+2/p-2 Key: UUCCCPNEFXQJEL-NUQVWONBAP;
	SMILES [Sr+2].[OH-].[OH-];
Properties
Chemical formula	Sr(OH)2
Molar mass	121.63 g/mol (anhydrous); 139.65 g/mol (monohydrate); 265.76 g/mol (octahydrate)
Appearance	prismatic colourless crystals ; deliquescent
Density	3.625 g/cm3 (anhydrous) ; 1.90 g/cm3 (octahydrate)
Melting point	535 °C (995 °F; 808 K) (anhydrous, 375K for octahydrate)
Boiling point	710 °C (1,310 °F; 983 K) decomposes (anhydrous)
Solubility in water	0.41 g/100 mL (0 °C) ; 1.77 g/100 mL (40 °C) ; 21.83 g/100 mL (100 °C)
Solubility	insoluble in acetone ; soluble in acid, NH4Cl
Basicity (pKb)	0.3 (first OH–), 0.83 (second OH–)
Magnetic susceptibility (χ)	−40.0·10−6 cm3/mol
Structure
Crystal structure	tetragonal (octahydrate)
Hazards
NFPA 704 (fire diamond)	1 0 1
Flash point	Non-flammable
Related compounds
Other anions	Strontium oxide; Strontium peroxide
Other cations	Beryllium hydroxide; Magnesium hydroxide; Calcium hydroxide; Barium hydroxide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Strontium hydroxide, Sr(OH)₂, is a caustic alkali composed of one strontium ion and two hydroxide ions. It is synthesized by combining a strontium salt with a strong base. Sr(OH)₂ exists in anhydrous, monohydrate, or octahydrate form.

^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
^ "Sortierte Liste: pKb-Werte, nach Ordnungszahl sortiert. - Das Periodensystem online" (in German).

[1] Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8

[2] "Sortierte Liste: pKb-Werte, nach Ordnungszahl sortiert. - Das Periodensystem online" (in German).

[1]

[2]

Identifiers

CAS Number	18480-07-4^Y 1311-10-0 (octahydrate)^Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:35105^Y
ChemSpider	79094^Y
ECHA InfoCard	100.038.501
EC Number	242-367-1
Gmelin Reference	847042
PubChem CID	87672
UNII	EPK818UET5^Y T2B33T08R4 (octahydrate)^Y
CompTox Dashboard (EPA)	DTXSID60893975
InChI InChI=1S/2H2O.Sr/h21H2;/q;;+2/p-2^Y Key: UUCCCPNEFXQJEL-UHFFFAOYSA-L^Y InChI=1/2H2O.Sr/h21H2;/q;;+2/p-2 Key: UUCCCPNEFXQJEL-NUQVWONBAP
SMILES [Sr+2].[OH-].[OH-]
Properties
Chemical formula	Sr(OH)₂
Molar mass	121.63 g/mol (anhydrous) 139.65 g/mol (monohydrate) 265.76 g/mol (octahydrate)
Appearance	prismatic colourless crystals deliquescent
Density	3.625 g/cm³ (anhydrous) 1.90 g/cm³ (octahydrate)
Melting point	535 °C (995 °F; 808 K) (anhydrous, 375K for octahydrate)
Boiling point	710 °C (1,310 °F; 983 K) decomposes (anhydrous)
Solubility in water	0.41 g/100 mL (0 °C) 1.77 g/100 mL (40 °C) 21.83 g/100 mL (100 °C) ^[1]
Solubility	insoluble in acetone soluble in acid, NH₄Cl
Basicity (pK_b)	0.3 (first OH^–), 0.83 (second OH^–)^[2]
Magnetic susceptibility (χ)	−40.0·10⁻⁶ cm³/mol
Structure
Crystal structure	tetragonal (octahydrate)
Hazards
NFPA 704 (fire diamond)	1 0 1
Flash point	Non-flammable
Related compounds
Other anions	Strontium oxide Strontium peroxide
Other cations	Beryllium hydroxide Magnesium hydroxide Calcium hydroxide Barium hydroxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is ^YN ?) Infobox references