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??? ???
??? ??? ??? ???
?? ??:
13446-72-5
???:
??? ???
???(??):
??????;??????(RUBIDIUMCHROMATE);???????
???:
RUBIDIUM CHROMATE
???(??):
RUBIDIUM CHROMATE;Dirubidium chromate;rubidium chromate(VI);RUBIDIUM CHROMATE 98%;Rubidium Chromate 99.9%;Rubidiumchromateyellowxtl;Chromicacid,dirubidiumsalt;RUBIDIUM CHROMATE (99.8%-RB);Dirubidium dioxido(dioxo)chromium;chromicacid(h2cro4),dirubidiumsalt
CBNumber:
CB5192797
???:
CrO4Rb2
??? ??:
286.93
MOL ??:
13446-72-5.mol
MSDS ??:
SDS

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??
3.518 g/mL at 25 °C (lit.)
??? ??
??
??
yellow rhombohedral crystals, crystalline
???
g/100g ?? H2O: 38.27(0°), 43.265(25°C) [KRU93]; g/100g H2O: 62.0(0°C), 73.6(20°C), 95.7(60°C) [LAN05]
InChI
1S/Cr.4O.2Rb/q;;;2*-1;2*+1
InChIKey
WXLJFWCCZKCVSQ-UHFFFAOYSA-N
SMILES
[Rb+].[Rb+].[O-][Cr]([O-])(=O)=O
CAS ??????
13446-72-5(CAS DataBase Reference)
EPA
Chromic acid (H2CrO4), dirubidium salt (13446-72-5)
??
  • ?? ? ?? ??
  • ?? ? ???? ?? (GHS)
??? ?? O,T,N
?? ???? ?? 45-46-8-42/43-50/53-43-49
????? 53-17-26-27-36/37/39-45-61-60
????(UN No.) UN 1479 5.1/PG 2
WGK ?? 3
TSCA TSCA listed
?? ?? 5.1
???? III
HS ?? 2841500090
???? ??? 5.1B - Oxidizing hazardous materials
Hazard Classifications Aquatic Acute 1
Aquatic Chronic 1
Carc. 1B
Ox. Sol. 2
Skin Sens. 1
????(GHS): Flame Over Circle (GHS03)Exclamation Mark (GHS07)Health Hazard (GHS08)Environment (GHS09)
?? ?: Danger
??·?? ??:
?? ??·?? ?? ?? ?? ?? ?? ? ?? ?? P- ??
H272 ??? ???? ?; ??? ??? ??;??? ?? ?? 2
?? 3
??
??
P210, P220, P221P280, P370+P378,P501
H317 ????? ?? ??? ??? ? ?? ?? ??? ?? ?? 1 ?? P261, P272, P280, P302+P352,P333+P313, P321, P363, P501
H350 ?? ??? ? ?? (????? ?? ???? ???? ???? ??? ?? ????? ??? ???? ??) ??? ?? ?? 1A, 1B ??
H410 ??? ??? ?? ????? ?? ??? ?? ????? ?? - ?? ?? 1 ?? P273, P391, P501
??????:
P202 ?? ?? ?? ??? ?? ???? ??? ???? ???.
P210 ?·???·??·????? ????? - ?? ???.
P273 ???? ???? ???.
P280 ????/???/???/?????? ?????.
P302+P352 ??? ??? ??? ?? ????.
P308+P313 ?? ?? ??? ???? ???? ??· ??? ????.

??? ??? C??? ??, ??, ??

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-20mesh with 99.9% purity; yellow crystal(s) [STR93] [CER91]

Synthesis

Obtained by evaporation of an aqueous solution of CrO3 which has been neutralized with Rb2CO3 (or RbOH). The by-product Rb2Cr2O7 forms at even a very small excess of CrO3; therefore somewhat more than the stoichiometric quantity of Rb2CO3 should be used.
Rb2CO3 + CrO3 = Rb2CrO4 + CO2

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