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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 10796Generated: October 23, 2026

Cesium carbonate

Caesiumbicarbonate · Hydrogen cesium carbonate · CESIUM HYDROGEN CARBONATE · carbonic acid, cesium salt · Carbonic acid/cesium,(1:x) salt · CESIUM HYDROGEN CARBONATE, 99.9% · CUP Cesium Hydroden Carbonate · Cesium hydrogen carbonate, 98% (metals basis)

https://huagongshe.com/en/chemical/10796

Cesium carbonate molecular structure

Identifiers & Physical Properties

CAS No.29703-01-3
Molecular formulaCCs2O3
Average molar mass325.82 g/mol
Monoisotopic mass325.7956478 g/mol
SMILESO=C([O-])[O-].[Cs+].[Cs+]
InChIKeyFJDQFPXHSGXQBY-UHFFFAOYSA-L
PubChem CID10796
EC No.208-591-9
DTXSIDDTXSID0052178

Chemical & Physical Properties

Topological polar surface area63.2
Hydrogen bond donors0
Hydrogen bond acceptors3
Rotatable bonds0
Heavy atoms6
Formal charge0
Complexity18
Density4.24 @25 °C
Melting point793 °C175°C
Physical DescriptionDry PowderLiquidHighly deliquescent solid[Merck Index] White odorless powder or granulesHygroscopic[Alfa Aesar MSDS]
Physical stateCrystalline Aggregates
SolubilitySoluble in water.
SensitivityHygroscopic
InChIInChI=1S/CH2O3.Cs/c2-1(3)4/h(H2,2,3,4)/q+1/p-1
InChIKeyZMCUDHNSHCRDBT-UHFFFAOYSA-M
SMILESC([O-])(=O)O.[Cs+]
CAS DataBase Reference29703-01-3(CAS DataBase Reference)
UNSPSC Code12352302
NACRESNA.22
GHS pictogramGHS08,GHS05
Signal wordDanger
GHS hazard statementsH318-H361f-H373
GHS precautionary statementsP202-P260-P280-P305+P351+P338-P308+P313-P405
Target organsKidney,Adrenal gland,Testes
Personal protective equipment (PPE)Eyeshields, Gloves, type N95 (US)
Safety statements (S)24/25
Water hazard class (WGK)3
Storage class11 - Combustible Solids
Hazard classEye Dam. 1Repr. 2STOT RE 2 Oral

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 1% (2 of 200) of reports.DangerH315 (41.5%): Causes skin irritation [Warning Skin corrosion/irritation]H318 (59%): Causes serious eye damage [Danger Serious eye damage/eye irritation]H319 (40%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]H335 (41%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposureRespiratory tract irritation]H361f (54.5%): Suspected of damaging fertility [Warning Reproductive toxicity]H373 (58.5%): May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]P203, P260, P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P305+P354+P338, P317, P318, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 200 reports by companies from 22 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.Reported as not meeting GHS hazard criteria per 2 of 200 reports by companies.There are 21 notifications provided by 198 of 200 reports by companies with hazard statement code(s).Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.
Regulatory informationChemical: Carbonic acid, dicesium saltCarbonic acid, cesium salt (1:2) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Carbonic acid, cesium salt (1:2) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Status: Active Update: 27-01-2023 https://echa.europa.eu/registration-dossier/-/registered-dossier/11170Carbonic acid, dicaesium salt: Does not have an individual approval but may be used under an appropriate group standard
Other safety informationEvaluation - Cesium salts
Hazards summaryCauses convulsions, elevated blood pressure, and proteinuria in intraperitoneal and subcutaneous lethal-dose studies of mice and rats[RTECS] A skin and strong eye irritant[Alfa Aesar MSDS] See Cesium.
Hazard Classes and CategoriesSkin Irrit. 2 (41.5%)Eye Dam. 1 (59%)Eye Irrit. 2 (40%)STOT SE 3 (41%)Repr. 2 (54.5%)STOT RE 2 (58.5%)Eye Dam. 1 (100%)Repr. 2 (100%)STOT RE 2 (100%)
Protective Action Criteria (PAC)7.0 [mg/m3]77 [mg/m3]460 [mg/m3]
Personal protective equipment (PPE)Eyeshields, Gloves, type N95 (US)
Water hazard class (WGK)3
Signal wordDanger
GHS pictogramGHS08,GHS05
Safety statements (S)24/25
Storage class11 - Combustible Solids
Target organsKidney,Adrenal gland,Testes
GHS hazard statementsH318-H361f-H373
Hazard classEye Dam. 1Repr. 2STOT RE 2 Oral
GHS precautionary statementsP202-P260-P280-P305+P351+P338-P308+P313-P405

Applications & Uses

Uses

Cesium hydrogen carbonate is used as pharmaceutical intermediate.