Synonyms
Disodium hydrogen arsenate (Na2HAsO4) heptahydrate; Dibasic sodium arsenate (Na2HAsO4.7H₂O); HSDB 6358; Disodium acid arsenate heptahydrate (Na2HAsO4.7H₂O); AKOS015916134; Sodium arsenate dibasic heptahydrate, >=98.0%; disodium hydrogenarsenate heptahydrate; dipotassium heptahydrate arsenate(2-); 90ZQ7G407W; Sodium orthoarsenate heptahydrate;
IUPAC Name
disodium;hydrogen arsorate;heptahydrate;
Molecular Weight
312.01g/mol
Molecular Formula
Na2HAsO4. 7H₂O;AsH15Na2O11;
Canonical SMILES
O.O.O.O.O.O.O.O[As](=O)([O-])[O-].[Na+].[Na+];
InChI
InChI=1S/AsH3O4.2Na.7H₂O/c2-1(3,4)5;;;;;;;;;/h(H3,2,3,4,5);;;7*1H2/q;2*+1;;;;;;;/p-2;
InChI Key
KOLXPEJIBITWIQ-UHFFFAOYSA-L;
Melting Point
135 ° F (NTP, 1992);57 deg C when rapidly heated;130 °C;
Density
1.88 (NTP, 1992);1.87;1.9 g/cm³;
Solubility
greater than or equal to 100 mg/mL at 77° F (NTP, 1992);5.46 g/100 cc water @ 0 deg C; 100 g/100 cc water @ 100 deg C; sol in glycerol;Solubility in water, g/100ml at 21 °C: 39;
Storage
Workers should keep containers of sodium arsenate heptahydrate tightly closed and under
lock and key in a cool, well-ventilated room/store area.
lock and key in a cool, well-ventilated room/store area.
Color Form
Colorless, monoclinic crystals;
Complexity
46.5
Covalently-Bonded Unit Count
10
Decomposition
When heated to decomp it emits toxic fumes of arsenic.;180 °C;
Exact Mass
311.963g/mol
H-Bond Acceptor
11
H-Bond Donor
8
Heavy Atom Count
14
ICSC Number
0326
Monoisotopic Mass
311.963g/mol
Odor
Odorless;
Other Experimental
Decomposes at 180 deg C;
RTECS Number
CG0900000
Stability
Effloresces in warm air;
Topological Polar Surface Area
90.4A^2
UNII
90ZQ7G407W
UN Number
1685
