IUPAC Name: triberyllium dicarbonate dihydroxide
Synonyms of Beryllium carbonate (CAS NO.66104-24-3): Beryllium carbonate, basic ; Berylliumoxide carbonate ; Bis(carbonato(2-))dihydroxytriberyllium ; Beryllium, bis(carbonato(2-))dihydroxytri-
CAS NO: 66104-24-3     
Molecular Formula of Beryllium carbonate (CAS NO.66104-24-3): C₂H₂Be₃O₈ 
Molecular Weight: 181.069         
H bond acceptors: 3
H bond donors: 2
Freely Rotating Bonds: 0
Polar Surface Area: 57.53 Å² 
Flash Point of Beryllium carbonate (CAS NO.66104-24-3): 169.8°C
Enthalpy of Vaporization: 63.37 kJ/mol
Boiling Point: 333.6 °C at 760 mmHg
Vapour Pressure: 2.58E-05 mmHg at 25°C
Molecular Structure:

NTP 10th Report on Carcinogens. IARC Cancer Review: Group 1 IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 58 (1993),p. 41.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Human Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 58 (1993),p. 41.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 1 (1972),p. 17.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 23 (1980),p. 143.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 58 (1993),p. 41.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . Reported in EPA TSCA Inventory. Beryllium and its compounds are on the Community Right-To-Know List.

Confirmed carcinogen. See also BERYLLIUM COMPOUNDS. When heated to decomposition it emits toxic BeO dust.

OSHA PEL: TWA 0.002 mg(Be)/m³; STEL 0.005 mg(Be)/m³/30M; CL 0.025 mg(Be)/m³
ACGIH TLV: TWA 0.002 mg(Be)/m³; Confirmed Human Carcinogen; (Proposed: TWA 0.0002 mg(Be)/m³ (sensitizer); Confirmed Human Carcinogen)
DFG MAK: Animal Carcinogen, Suspected Human Carcinogen
NIOSH REL: CL not to exceed 0.0005 mg(Be)/m³

 Beryllium carbonate is a chemical compound with the chemical formula BeCO₃. There are three forms reported, basic beryllium carbonate, a tetrahydrate and  anhydrous. Basic beryllium carbonate is a mixed salt, which can be prepared by the reaction of beryllium sulfate and ammonium carbonate, and contains both carbonate and hydroxide ions, with formula Be₂CO₃(OH)₂. The tetrahydrate is said to be formed when CO₂ is bubbled through a solution of Be(OH)₂ and is also reported to be similarly unstable.The anhydrous form is reported to be unstable, decomposing to BeO and CO₂, and requiring storage under CO₂.