Barium hydroxide monohydrate - ≥98% , CAS No.22326-55-2

CAS: 22326-55-2 Cat. No.: B192147 Formula: BaH₄O₃ Molecular Weight: 189.36 EC Number: 606-983-8

GRADE & PURITY ≥98%

Synonyms

Barium hydroxide monohydrate, purum p.a., >=98.0% (T) | Barium hydroxide monohydrate, 98% | UNII-P27GID97XM | Barium hydroxide (Ba(OH)2), monohydrate | J-014643 | P27GID97XM | Barium hydroxide hydrate, 99.995% trace metals basis | Barium hydroxide monohyd

Storage

Room temperature

Shipped In

FedEx DG Service

Specifications

Synonyms

Barium hydroxide monohydrate, purum p.a., >=98.0% (T) | Barium hydroxide monohydrate, 98% | UNII-P27GID97XM | Barium hydroxide (Ba(OH)2), monohydrate | J-014643 | P27GID97XM | Barium hydroxide hydrate, 99.995% trace metals basis | Barium hydroxide monohyd

Specifications & Purity

≥98%

Storage

Room temperature

Shipped In

FedEx DG Service

Purity

≥98%

Names and Identifiers

• Pubchem Sid: 504768096
• Pubchem Sid Url: https://pubchem.ncbi.nlm.nih.gov/substance/504768096
• Canonical Smiles: O.[OH-].[OH-].[Ba+2]
• IUPAC Name: barium(2+);dihydroxide;hydrate
• InChIKey: GKQTUHKAQKWLIN-UHFFFAOYSA-L
• INCHI: 1S/Ba.3H2O/h;3*1H2/q+2;;;/p-2
• Isomeric SMILES: O.[OH-].[OH-].[Ba+2]
• WGK Germany: 1
• UN Number: 1564
• Packing Group: II
• Molecular Weight: 189.36
• Reaxy-Rn: 14627681
• Reaxys-RN_link_address: https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=14627681&ln=

Taxonomic Classification

Taxonomy Tree

• Kingdom Inorganic compounds
  • Superclass Mixed metal/non-metal compounds
    • Class Alkaline earth metal oxoanionic compounds
      • Subclass Alkaline earth metal hydroxides

• Kingdom: Inorganic compounds
• Superclass: Mixed metal/non-metal compounds
• Class: Alkaline earth metal oxoanionic compounds
• Subclass: Alkaline earth metal hydroxides
• Intermediate Tree Nodes: Not available
• Direct Parent: Alkaline earth metal hydroxides
• Alternative Parents: Inorganic salts Inorganic oxides Inorganic hydrides
• Molecular Framework: Not available
• Substituents: Alkaline earth metal hydroxide - Inorganic hydride - Inorganic oxide - Inorganic salt
• Description: This compound belongs to the class of inorganic compounds known as alkaline earth metal hydroxides. These are inorganic compounds in which the largest oxoanion is hydroxide, and in which the heaviest atom not in an oxoanion is an alkaline earth metal.
• External Descriptors: Not available

Data sources

1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61.

DOI: 10.1186/s13321-016-0174-y

Chemical and Physical Properties

• Solubility: Soluble in water.
• Sensitivity: Air & Moisture Sensitive
• Molecular Weight: 189.360 g/mol
• Hydrogen Bond Donor Count: 3
• Hydrogen Bond Acceptor Count: 3
• Rotatable Bond Count: 0
• Exact Mass: 189.921 Da
• Monoisotopic Mass: 189.921 Da
• Topological Polar Surface Area: 3.000 Ų
• Heavy Atom Count: 4
• Formal Charge: 0
• Complexity: 2.800
• Isotope Atom Count: 0
• Defined Atom Stereocenter Count: 0
• Undefined Atom Stereocenter Count: 0
• Defined Bond Stereocenter Count: 0
• Undefined Bond Stereocenter Count: 0
• The total count of all stereochemical bonds: 0
• Covalently-Bonded Unit Count: 4

XLogP3

References

1. Zhao Dong, Shan Shu-Xi, Zhang Meng, Zhang Xiao-A, Jiang Sheng-Ling, Lyu Ya-Fei.  (2020)  Preparation of Titanium-silphenylene-siloxane Hybrid Polymers with High Refractive Index, Transmittance, and Thermal Stability.  CHINESE JOURNAL OF POLYMER SCIENCE,  38  (9): (973-982).  [PMID:] [10.1007/s10118-020-2398-6]

2. Yufeng Huang, Yakai Feng, Xujun Sun, Ying Han, Dongshun Liu, Xiaohua Tan.  (2019)  Preparation of ZrO2/silicone hybrid materials for LED encapsulation via in situ sol-gel reaction.  POLYMERS FOR ADVANCED TECHNOLOGIES,  30  (7): (1818-1824).  [PMID:] [10.1002/pat.4614]

3. Shen Shen, Qishan Xie, Smruti Ranjan Sahoo, Jian Jin, Glib V. Baryshnikov, Hao Sun, Hongwei Wu, Hans Ågren, Qingsong Liu, Liangliang Zhu.  (2024)  Edible Long-Afterglow Photoluminescent Materials for Bioimaging.  ADVANCED MATERIALS,  36  (30): (2404888).  [PMID:38738587] [10.1002/adma.202404888]

4. Meng Yu, Yi Guo, Shaowen Zhou, Yanhuai Li, Zexing Deng, Xin Zhao, Yong Han.  (2024)  Spreadable thermosensitive nanocomposite hydrogel dressing with ultrasound-responsive bactericidal/repair-promoting regulation and cascade antioxidantion for infected burn wound repair.  JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,      [PMID:] [10.1016/j.jmst.2024.08.054]

5. Zichang Wang, Qingyu Liu, Zhihua Yang, Xueling Hou, Minqiang Gai.  (2025)  Metal Cation Engineered UV Birefringent Crystals in π-Conjugated Sulfonates with Record-High Optical Anisotropy.  Small,      [PMID:40191875] [10.1002/smll.202502594]

6. Gaiying Han, Pei Wang, Xinxin Zhang, Zhaoyang Wang, Haitao Yu, Zhenzi Li, Ying Xie, Wei Zhou.  (2025)  Mechanistic insights into chemical bonded BaTiO3/MoS2 dual piezoelectric heterojunction for Robust Piezo-Photocatalytic performance.  JOURNAL OF COLLOID AND INTERFACE SCIENCE,      [PMID:40414037] [10.1016/j.jcis.2025.137919]

7. Miao-Miao Shi, Bo Han, Jia-Xin Song, Zhu-Bao Shao.  (2025)  One-Step Fabrication of Polysiloxane with Simultaneously Low Dielectric Property, High Flame Retardancy, and High Heat Resistance.  ACS Applied Polymer Materials,      [PMID:] [10.1021/acsapm.5c01147]

8. Yanli Huang, Haifen Luo, Jie Yin, Shuai Cao, Gaolei Dong, Zhi Tan, Chunlin Zhao, Peiye Wen, Fengwei Sun, Shan Zhang, Xianzeng Zhang, Yunlu Dai, Zhen Yang, Wei Huang.  (2026)  Boosting Photo-Pyroelectric Effect via Tunable Polarization and Interfacial Defect Engineering.  Advanced Science,      [PMID:41722052] [10.1002/advs.202519280]

9. Jiaheng Xu, Huajun Sun, Xinyue Yang, Huiling Guo.  (2026)  BaTiO3/FeOCl composite as highly efficient Piezo-Photo-Fenton catalyst for the degradation of tetracycline hydrochloride.  INORGANIC CHEMISTRY COMMUNICATIONS,      [PMID:] [10.1016/j.inoche.2026.117197]

10. Wenjie Ma, Ru Jia, Patiguli Aihemaiti, Houfeng Jiang, Lanlan Dong, Wurikaixi Aiyiti, Cijun Shuai, Chongxian He.  (2026)  Doping-engineered nanosystem for enhancing the antibacterial efficiency of scaffolds through synergistic aSDT and CDT.  CHEMICAL ENGINEERING JOURNAL,      [PMID:] [10.1016/j.cej.2026.180612]

Frequently Asked Questions

What is the purity of this product?

This product is supplied at ≥98% purity (chemical assay). Lot-specific values are stated on the Certificate of Analysis.

How should this product be stored?

Store at room temperature.

How is this product shipped?

This product is classified as dangerous goods and ships via FedEx DG Service. Ground and other economy services are not available, and delivery to some destinations or address types may be restricted.

What are the CAS number, molecular formula and molecular weight?

The CAS Number is 22326-55-2, the molecular formula is BaH4O3, and the molecular weight is 189.36 g/mol. InChIKey GKQTUHKAQKWLIN-UHFFFAOYSA-L.

What documentation is provided?

Available product documentation, including Certificates of Analysis (COA), Safety Data Sheets (SDS), and specification sheets, is shown in the product document area. Document availability and access follow the current site policy.