Basic information
- Name:
Barium hydroxide
- CAS No.:
17194-00-2
- Molecular Structure:
- Formula:
- BaH2O2
- Molecular Weight:
- 171.35
- Deleted CAS:
- 1304-17-2
- Synonyms:
- Barium hydroxide lime;Bariumhydroxid;Aetzbaryt;barium(2+) hydroxide;Barium hydroxide (Ba(OH)2);calcined ;; see also Barium oxide (BaO) [1304-28-5] hydrated ;; see also Barium hydroxide (Ba(OH)2);Carbonic acid,compounds,barium salt (1:1);barium(II) hydroxide;Caustic baryta;Barium dihydroxide;Barium hydroxide lime [USAN];Barium Hydroxide,High purity;Barium hydroxide, high purity;
- EINECS:
- 241-234-5
- Density:
- 2.2 g/mL at 25 °C(lit.)
- Melting Point:
- >300 °C(lit.)
- Solubility:
- soluble in water
- Appearance:
- white crystalline powder
- Hazard Symbols:
C,
Xi- Risk Codes:
- 36/37/38-34-20/22
- Safety Description:
- 26-36/37/39-45-36/37 Details
- Transport Information:
- UN 3262 8/PG 2
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Chemistry
Molecular structure of Barium hydroxide (CAS NO.17194-00-2) is:
Product Name: Barium hydroxide
CAS Registry Number: 17194-00-2
IUPAC Name: barium(2+) dihydroxide
Molecular Weight: 171.34168 [g/mol]
Molecular Formula: BaH2O2
H-Bond Donor: 2
H-Bond Acceptor: 2
EINECS: 241-234-5
Melting Point: >300 °C(lit.)
Density: 2.2 g/mL at 25 °C(lit.)
Sensitive: Air Sensitive & Hygroscopic
Stability: Stable. Incompatible with acids, carbon dioxide, moisture.
Product Categories: Industrial/Fine Chemicals;Inorganics;Barium SaltsChemical Synthesis;Inorganic Bases;Metal and Ceramic Science;Salts;Synthetic Reagents;Base SolutionsChemical Synthesis;By Reference Material;Inorganic BasesVolumetric Solutions;Reference Material Hydrochloric acid;Titration;Volumetric Solutions;Chemical Synthesis
Uses
Barium hydroxide (CAS NO.17194-00-2) is used in analytical chemistry for the titration of weak acids, particularly organic acids as analytical reagent, but also used to separate and manufacture of precipitated barium sulfate salts and used in organic synthesis as a strong base. And under the name baryta it is used in homeopathic remedies and it is also used to clean up acid spills.
Production
Barium hydroxide (CAS NO.17194-00-2) can be prepared by dissolving barium oxide (BaO) in water.
BaO + 9H2O → Ba(OH)2·8H2O
It decomposes to barium oxide when heated to 800°C. Reaction with carbon dioxide makes barium carbonate. Its aqueous solution, being highly alkaline, undergoes neutralization reactions with acids. Thus, it forms barium sulfate and barium phosphate with sulfuric and phosphoric acids, respectively. Reaction with hydrogen sulfide produces barium sulfide. Precipitation of many insoluble, or less soluble barium salts, may result from double decomposition reaction when a barium hydroxide aqueous solution is mixed with many solutions of other metal salts.
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| mammal (species unspecified) | LD50 | oral | 308mg/kg (308mg/kg) | AUTONOMIC NERVOUS SYSTEM: OTHER (DIRECT) PARASYMPATHOMIMETIC BEHAVIORAL: MUSCLE WEAKNESS GASTROINTESTINAL: NAUSEA OR VOMITING | Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 28(6), Pg. 45, 1984. |
| mouse | LD50 | intraperitoneal | 255mg/kg (255mg/kg) | AUTONOMIC NERVOUS SYSTEM: OTHER (DIRECT) PARASYMPATHOMIMETIC BEHAVIORAL: MUSCLE WEAKNESS GASTROINTESTINAL: NAUSEA OR VOMITING | Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 28(6), Pg. 45, 1984. |
Safety Profile
A poison by ingestion and intraperitoneal routes. See also BARIUM COMPOUNDS (soluble). Incompatible with chlorinated rubber.
Hazard Codes: 
C,
Xi
Risk Statements: 36/37/38-34-20/22
R36/37/38:Irritating to eyes, respiratory system and skin.
R34:Causes burns.
R20/22:Harmful by inhalation and if swallowed.
Safety Statements: 26-36/37/39-45-36/37
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S36/37:Wear suitable protective clothing and gloves.
RIDADR: UN 3262 8/PG 2
WGK Germany: 1
RTECS: CQ9200000
HazardClass: 8
PackingGroup: III
Specification
Barium hydroxide , its cas register number is 17194-00-2. It also can be called Barium hydroxide lime [USAN] ; Barium Hydroxide (Ba(OH)2) ; Barium dihydroxide ; Barium hydroxide lime ; Caustic baryta .It is a white crystalline powder.
