Strontium hydroxide Property

Melting point:

535°C

Density 

3.625

vapor pressure 

0Pa at 20℃

form 

colorless orthorhombic crystals

color 

colorless orthorhombic crystals, crystalline; hygroscopic

PH

11.27(1 mM solution);12.22(10 mM solution);13.09(100 mM solution)

Water Solubility 

g/100g solution in H2O: 0.90 (0°C), 2.16 ± 0.41 (25°C), 47.71 (100°C); solid phase, Sr(OH)2 · 8H2O [KRU93]

Merck 

13,8924

Stability:

Stable.

CAS DataBase Reference

18480-07-4(CAS DataBase Reference)

NIST Chemistry Reference

Strontium hydroxide(18480-07-4)

EPA Substance Registry System

Strontium hydroxide (Sr(OH)2) (18480-07-4)

Safety

Hazard Codes 

C

Risk Statements 

34

Safety Statements 

26-27-36/37/39-45

RIDADR 

UN 3262 8/PG 2

WGK Germany 

3

RTECS 

WK9100000

HazardClass 

8

PackingGroup 

III

HS Code 

28164000

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H314Causes severe skin burns and eye damage

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P363Wash contaminated clothing before reuse.

Strontium hydroxide Chemical Properties,Usage,Production

Uses

Strontium hydroxide is used in extracting sugar from beet sugar molasses and in making lubricant soaps and greases.

Toxicity

Dry compound or aqueous solution is corrosive. Contact with skin or eyes can cause irritation.

Description

Strontium Hydroxide occurs as an anhydrate whose prismatic, colorless crystals are deliquescent. A monohydrate and octahydrate are also known.Strontium hydroxide is slightly soluble in water but, surprisingly, the octahydrate is much more soluble. It is the latter that is supplied commercially for most applications.When the octahydrate is heated, seven waters of hydration are lost to form the monohydrate and finally the oxide.

Chemical Properties

colourless deliquescent crystals

Physical properties

White deliquescent crystal; density 3.625 g/cm³; melts at 375°C in hydrogen atmosphere; converts to oxide at 710°C; slightly soluble in water at 0°C, 0.41 g/100 mL, soluble in boiling water at 100°C, 21.83 g/100 mL; soluble in acids and ammonium chloride solution.
The octahydrate consists of colorless, tetragonal, deliquescent crystals; density 1.90 g/cm³; loses all its water molecules at 100°C; sparingly soluble in water at low temperatures, 0.90 g/100 mL at 0°C; soluble in boiling water, 47.7 g/100 mL at 100°C; aqueous solution highly alkaline; soluble in acids and in ammonium chloride solution; insoluble in acetone.

Uses

Extraction of sugar from beet sugar molasses, lubricant soaps and greases, stabilizer for plastics, glass, adhesives.

Uses

Strontium hydroxide [Sr(OH)2] is used to extract sugar from sugar beet molasses. It is also used in the manufacture of soaps, adhesives, plastics, glass, and lubricants that can be used in very high or low temperature environments.

Uses

Strontium hydroxide is used chiefly in the refining of beet sugar and as a stabilizer in plastic. It may be used as a source of strontium ions when the Cl^- ion is undesirable. Strontium hydroxide absorbs carbon dioxide from the air to form strontium carbonate. This salt is available commercially in sizable quantities.

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.

Definition

ChEBI: Strontium dihydroxide is a strontium hydroxide.

Flammability and Explosibility

Not classified

Purification Methods

Crystallise the hydroxide from hot water (2.2mL/g) by cooling to 0o.