Inorganic Acids & Bases
REACH
Strontium hydroxide
CAS Number
18480-07-4
EC Number
242-367-1
Chemical Formula
H2O2Sr
Molecular Weight
121.63 g/mol
Form
powder, crystal
Grade
technical
What is Strontium hydroxide?
Strontium hydroxide (CAS 18480-07-4) is a strong inorganic base used industrially for pH adjustment, neutralization, and as a strontium source in chemical synthesis.
Where is Strontium hydroxide used?
- Water treatment: neutralizes acidic effluents and precipitates heavy metal contaminants, supporting compliance with discharge standards
- Electronics: production of strontium-based compounds for cathode ray tube glass and specialty ceramic formulations
- Precursor in synthesizing strontium salts such as strontium carbonate and strontium nitrate for pyrotechnics and optical glass
- Sugar refining historically separated sucrose from molasses through strontianite precipitation, though this application is now limited.
Commercial specifications
- Anhydrous and octahydrate forms
- Packaging from small drums to bulk quantities
- Purity commonly 95% or higher depending on end-use requirements
Other Names (Synonyms)
Sr(OH)2|strontium hydroxide anhydrous|Strontium dihydroxide|Strontium hydroxide (Sr(OH)2)|Strontium hydroxide (Sr(OH)2), octahydrate|EPK818UET5|RefChem:932299
What are the physical properties of Strontium hydroxide?
Melting Point 498 °C
Boiling Point 710 °C (decomposes)
Density 3.625
Appearance colourless deliquescent crystals
Color colorless orthorhombic crystals, crystalline; hygroscopic
Odor Odorless
Form colorless orthorhombic crystals
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]
Vapor Pressure 0Pa at 20℃
Refractive Index 1.650
pH 11.27(1 mM solution);12.22(10 mM solution);13.09(100 mM solution)
How is Strontium hydroxide classified and handled safely? Learn More
Danger
GHS05· Corrosive GHS07· Irritant
Hazard Statements
H302 Harmful if swallowed
H314 Causes severe skin burns and eye damage
H318 Causes serious eye damage
Precautionary Statements
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
Which trade and regulatory codes apply to Strontium hydroxide?
HS Code 28164000
UN Number 3262
ADR Class 8
Packing Group II
Storage Class 8B - Non-combustible corrosive hazardous materials
WGK (Germany) 3