Cesium hydroxide solution - ≥99% metals basis, 50 wt. % in H2O , CAS No.21351-79-1

CAS: 21351-79-1 Cat. No.: C192038 Formula: CsOH Molecular Weight: 149.91 EC Number: 244-344-1
AVAILABLE TO ORDER
GRADE & PURITY ≥99% metals basis 50 wt. % in H2O
Synonyms
Caesium hydroxide [UN2682] [Corrosive] | Cesium hydroxide monohydrate, >=99.5% trace metals basis | Cesium, di-mu-hydroxydi- | Cesium hydrate | CHEBI:33988 | Cesium hydroxide,hydrate(99.9%-cs) | CsOH | EINECS 244-344-1 | cesium;hydroxide | AKOS015904638
Storage
Room temperature
Shipped In
FedEx DG Service
Size
Germany (EU)
USA*
Price
Qty
100g
C192038-100g
1 In stock
€94.50
500g
C192038-500g
Made to order · 8–12 wks
€326.18
Enter a quantity for the sizes you want to add.
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Why this grade

≥99% metals basis, 50 wt. % in H2O for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Room temperature Ships FedEx DG Service Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 22 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
Caesium hydroxide [UN2682] [Corrosive] | Cesium hydroxide monohydrate, >=99.5% trace metals basis | Cesium, di-mu-hydroxydi- | Cesium hydrate | CHEBI:33988 | Cesium hydroxide,hydrate(99.9%-cs) | CsOH | EINECS 244-344-1 | cesium;hydroxide | AKOS015904638
Specifications & Purity
≥99% metals basis, 50 wt. % in H2O
Storage
Room temperature
Shipped In
FedEx DG Service
Purity
≥99% metals basis
Names and Identifiers
Pubchem Sid528772472
Canonical Smiles[OH-].[Cs+]
IUPAC Namecesium;hydroxide
InChIKeyHUCVOHYBFXVBRW-UHFFFAOYSA-M
INCHI1S/Cs.H2O/h;1H2/q+1;/p-1
Isomeric SMILES [OH-].[Cs+]
WGK Germany 3
UN Number 2681
Packing Group II
Molecular Weight 149.91
Reaxy-Rn 11342933
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=11342933&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

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📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

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Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomInorganic compounds
SuperclassMixed metal/non-metal compounds
ClassAlkali metal oxoanionic compounds
SubclassAlkali metal hydroxides
Intermediate Tree Nodes Not available
Direct ParentAlkali metal hydroxides
Alternative Parents Inorganic salts  Inorganic oxides  Inorganic hydrides  
Molecular FrameworkNot available
Substituents Alkali metal hydroxide - Inorganic hydride - Inorganic oxide - Inorganic salt
DescriptionThis compound belongs to the class of inorganic compounds known as alkali 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 alkali metal.
External Descriptors caesium molecular entity - alkali metal hydroxide
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

25 results found

Lot NumberCertificate TypeDateItem
G2614268Certificate of AnalysisJul 21, 2026 C192038
G2614267Certificate of AnalysisJul 21, 2026 C192038
E2627392Certificate of AnalysisJun 05, 2026 C192038
A2622344Certificate of AnalysisJan 27, 2026 C192038
A2622311Certificate of AnalysisJan 27, 2026 C192038
K2514313Certificate of AnalysisNov 24, 2025 C192038
K2514312Certificate of AnalysisNov 24, 2025 C192038
G2524216Certificate of AnalysisAug 07, 2025 C192038
G2524217Certificate of AnalysisAug 07, 2025 C192038
C2507335Certificate of AnalysisMar 18, 2025 C192038
C2507334Certificate of AnalysisMar 18, 2025 C192038
B2513081Certificate of AnalysisDec 25, 2024 C192038
L2418439Certificate of AnalysisDec 25, 2024 C192038
L2418440Certificate of AnalysisDec 25, 2024 C192038
F2419232Certificate of AnalysisJun 27, 2024 C192038
F2419233Certificate of AnalysisJun 27, 2024 C192038
L2404078Certificate of AnalysisJun 27, 2024 C192038
K2303288Certificate of AnalysisNov 14, 2023 C192038
K2303289Certificate of AnalysisNov 14, 2023 C192038
F2305168Certificate of AnalysisJun 17, 2023 C192038
F2305172Certificate of AnalysisJun 16, 2023 C192038
B2321375Certificate of AnalysisFeb 27, 2023 C192038
E2311163Certificate of AnalysisOct 21, 2022 C192038
J2211783Certificate of AnalysisOct 21, 2022 C192038
J2211857Certificate of AnalysisOct 21, 2022 C192038

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Chemical and Physical Properties
Molecular Weight149.913 g/mol
XLogP3
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count1
Rotatable Bond Count0
Exact Mass149.908 Da
Monoisotopic Mass149.908 Da
Topological Polar Surface Area1.000 Ų
Heavy Atom Count2
Formal Charge0
Complexity2.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count2
Citations of This Product
References
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12. Zhigang Xue, Yuan Shen, Liang Chen, Bo Liu, Na Hu, Rongfei Zhou, Weihong Xing.  (2024)  High-performance 19-channel monolithic chabazite membranes for efficient separation of water/ethanol and water/isopropanol mixtures by pervaporation and vapor permeation.  JOURNAL OF MEMBRANE SCIENCE,      [PMID:] [10.1016/j.memsci.2024.123353]
13. Weibo Chen, Feng Ye, Shuanshi Fan, Yanhong Wang, Xuemei Lang, Zijian Zhang, Gang Li.  (2025)  Manipulating pore structures of SSZ-13 zeolite membranes via hydrocracking activation for superior H2/CO2 separation.  MICROPOROUS AND MESOPOROUS MATERIALS,      [PMID:] [10.1016/j.micromeso.2025.113518]
14. Wei Du, Xiaomin Zhang, Songze Li, Xin Xie.  (2024)  Novel Perspective on Sevoflurane-Induced Cognitive Dysfunction: Implications of Neuronal SIRPα and Microglial Synaptic Remodeling.  ACS Chemical Neuroscience,      [PMID:39644326] [10.1021/acschemneuro.4c00485]
15. Gao Kai, Shi Yunfeng, An Kexin, Tan Jun, Zhang Yanna, Dong Jiajie, Yu Weiyue, Lin Haipeng.  (2024)  Rapid synthesis of pollucite by hydrothermal method for the treatment of cesium in wastewater.  JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY,      [PMID:] [10.1007/s10967-024-09554-y]
16. Qianwen Zhu, Yifan Yue, Xiejun Wang, Baohe Wang, Jing Zhu, Jing Ma.  (2024)  SiO2-Supported DMDAAC-Modified Heteropoly Acid as Highly Active and Stability Catalysts for Methacrolein Oxidation.  INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,      [PMID:] [10.1021/acs.iecr.4c01463]
17. Qi Li, Hongfei Pan, Xiege Huang, Wei Xi, Wenmao Tu, Haining Zhang, Haolin Tang.  (2025)  Atomized potassium-assisted hydrogen generation from ammonia decomposition over ruthenium loaded carbon-based catalysts.  CHEMICAL ENGINEERING JOURNAL,      [PMID:] [10.1016/j.cej.2025.166994]
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