78 °C (172 °F; 351 K) (octahydrate) 300 °C (monohydrate) 407 °C (anhydrous)
Boiling point
780 °C (1,440 °F; 1,050 K)
Solubility in water
mass of BaO (not Ba(OH)2): 1.67 g/100 mL (0 °C) 3.89 g/100 mL (20 °C) 4.68 g/100 mL (25 °C) 5.59 g/100 mL (30 °C) 8.22 g/100 mL (40 °C) 11.7 g/100 mL (50 °C) 20.94 g/100 mL (60 °C) 101.4 g/100 mL (100 °C)[citation needed]
Solubility in other solvents
low
Basicity (pKb)
0.15 (first OH–), 0.64 (second OH–)[1]
Magnetic susceptibility (χ)
−53.2·10−6 cm3/mol
Refractive index (nD)
1.50 (octahydrate)
Structure
Crystal structure
octahedral
Thermochemistry[2]
Std enthalpy of formation (ΔfH⦵298)
−944.7 kJ·mol−1
Enthalpy of fusion (ΔfH⦵fus)
16 kJ·mol−1
Hazards
GHS labelling:
Pictograms
Signal word
Danger
Hazard statements
H302, H314, H332, H412
NFPA 704 (fire diamond)
3
1
1
Flash point
Non-flammable
Lethal dose or concentration (LD, LC):
LD50 (median dose)
308 mg/kg (rat, oral)
Safety data sheet (SDS)
Fisher Scientific
Related compounds
Other anions
Barium oxide Barium peroxide
Other cations
Calcium hydroxide Strontium hydroxide
Supplementary data page
Barium hydroxide (data page)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
Chemical compound
Barium hydroxide is a chemical compound with the chemical formula Ba(OH)2. The monohydrate (x = 1), known as baryta or baryta-water, is one of the principal compounds of barium. This white granular monohydrate is the usual commercial form.
^"Sortierte Liste: pKb-Werte, nach Ordnungszahl sortiert. - Das Periodensystem online" (in German).
^Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.
Bariumhydroxide is a chemical compound with the chemical formula Ba(OH)2. The monohydrate (x = 1), known as baryta or baryta-water, is one of the principal...
crystallized as colorless crystals. Barium chloride can in principle be prepared by the reaction between bariumhydroxide or barium carbonate with hydrogen chloride...
fusion of elements heavier than iron in supernovae Dissolving together bariumhydroxide and ammonium chloride Dissolving together citric acid and baking soda...
pure water), as are the hydroxides of the heavier alkaline earths: calcium hydroxide, strontium hydroxide, and bariumhydroxide. A solution or suspension...
comparison). Bariumhydroxide ("baryta") was known to alchemists, who produced it by heating barium carbonate. Unlike calcium hydroxide, it absorbs very...
Radium hydroxide is a caustic, toxic, and corrosive substance. It is significantly more toxic than bariumhydroxide (Ba(OH)2) and strontium hydroxide (Sr(OH)2)...
hydroxide (Ra(OH)2) is the most readily soluble among the alkaline earth hydroxides and is a stronger base than its barium congener, bariumhydroxide...
Calcium hydroxide (traditionally called slaked lime) is an inorganic compound with the chemical formula Ca(OH)2. It is a colorless crystal or white powder...
Magnesium hydroxide is an inorganic compound with the chemical formula Mg(OH)2. It occurs in nature as the mineral brucite. It is a white solid with low...
chromate analog of baryte, BaSO4. It can be synthesized by reacting bariumhydroxide or barium chloride with potassium chromate. Ba ( OH ) 2 + K 2 CrO 4 ⟶ BaCrO...
Barium cyanide is a chemical compound with the formula Ba(CN)2. It is synthesized by the reaction of hydrogen cyanide and bariumhydroxide in water or...
temperatures. Barium borate can be prepared by reaction of an aqueous solution of boric acid with bariumhydroxide. The prepared γ-barium borate contains...
precipitate, reducing the coprecipitation of bariumhydroxide and barium carbonate as impurities. Barium ferrate is an oxidizing agent and is used as...
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...
temperature, and beside sodium hydroxide or potassium hydroxide, calcium hydroxide, bariumhydroxide, magnesium hydroxide or carbonates of alkali or alkaline...
Baralyme is a mixture of 80% calcium hydroxide and 20% bariumhydroxide compounds that is used as an alternative to soda lime to absorb the exhaled carbon...
follows: perchloric acid and bariumhydroxide or carbonate; potassium perchlorate and hydrofluosilicic acid followed with barium carbonate; boiling solution...
produce calcium hydroxide: CaO + H2O → Ca(OH)2 Strontium oxide reacts with water to produce strontium hydroxide: SrO + H2O → Sr(OH)2 Barium oxide reacts...
hydroxide (Ra(OH)2) is the most readily soluble among the alkaline earth hydroxides and is a stronger base than its barium congener, bariumhydroxide...
saponified fat. (The hydroxide solution used in such a titration is typically made from sodium hydroxide, potassium hydroxide, or bariumhydroxide.) This number...
saponified fat. (The hydroxide solution used in such a titration is typically made from sodium hydroxide, potassium hydroxide, or bariumhydroxide.) It is measure...
cyclic ketone is a colorless volatile liquid. Upon treatment with bariumhydroxide at elevated temperatures, adipic acid undergoes ketonization to give...
reactions to take place. For example barium thiocyanate forms when boiling a slurry of copper(I) thiocyanate and bariumhydroxide in water: Ba(OH) 2 + 2CuCNS →...
chloride with other chemicals are endothermic, such as its reaction with bariumhydroxide and its dissolving in water. The dominant application of ammonium chloride...
suited for intramolecular condensation reactions. Upon treatment with bariumhydroxide at elevated temperatures, it undergoes ketonization to give cyclopentanone...
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