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| CAS No.: | 12161-82-9 |
|---|---|
| Name: | Bertrandite (Be4(OH)2O(SiO3)2) |
| Molecular Structure: | |
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| Formula: | Be4H2 O9 Si2 |
| Molecular Weight: | 264.34 |
| Synonyms: | Bertrandite(8CI) |
| Density: | 2.604 g/cm3 |
| Hazard Symbols: | 3 |
| Safety: | Confirmed carcinogen. See also BERYLLIUM and BERYLLIUM COMPOUNDS. When heated to decomposition it emits very toxic fumes of BeO. |
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Chemistry
Molecular Formula of Bertrandite (CAS NO.12161-82-9): Be4H2O9Si2
Synonyms: Bertrandite (Be4(H2Si2O9).H2O) ; Bertrandite ore ; Beryllium silicate hydrate ; EINECS 235-299-9 ; HSDB 2958
Consensus Reports
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.
Safety Profile
Confirmed carcinogen. See also BERYLLIUM and BERYLLIUM COMPOUNDS. When heated to decomposition it emits very toxic fumes of BeO.
Standards and Recommendations
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)
NIOSH REL: (Beryllium) CL not to exceed 0.0005 mg(Be)/m3
Specification
Bertrandite (CAS NO.12161-82-9) is a beryllium sorosilicate hydroxide mineral. Bertrandite (CAS NO.12161-82-9) is a colorless to pale yellow orthorhombic mineral with a hardness of 6-7. It is commonly found in beryllium rich pegmatites and is in part an alteration of beryl. Bertrandite often occurs as a pseudomorphic replacement of beryl. It, with beryl, are ores of beryllium. It was discovered near Nantes, France in 1883 and named after French mineralogist, Emile Bertrand (1844-1909). Bertrandite (CAS NO.12161-82-9) is high toxic. It will produce toxic beryllium oxide fumes by heat. So the storage environment should be ventilate, low-temperature and dry. Keep Bertrandite (CAS NO.12161-82-9) separate from raw materials of food.