Molecule structure of Selenious acid, dipotassium salt (CAS NO.10431-47-7) :

IUPAC Name: dipotassium selenite 
Molecular Weight: 205.1548 g/mol
Molecular Formula: K₂O₃Se 
Density: 2.851^1^5
Melting Point: 875°C (dec.)
Sensitive: hygroscopic
H-Bond Acceptor: 3
Exact Mass: 205.828679
MonoIsotopic Mass: 205.828679
Topological Polar Surface Area: 63.2
Heavy Atom Count: 6
Complexity: 18.8
Canonical SMILES: [O-][Se](=O)[O-].[K+].[K+]
InChI: InChI=1S/2K.H2O3Se/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2
InChIKey: RNGFNLJMTFPHBS-UHFFFAOYSA-L
EINECS: 233-909-8

Reported in EPA TSCA Inventory.

A poison and corrosive. When heated to decomposition it emits toxic vapors of selinium.
Hazard Codes: T
Risk Statements: 23/25-33-50/53-36/37/38-23/24/25 
R23/25:Toxic by inhalation and if swallowed. 
R33:Danger of cumulative effects. 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 
R36/37/38:Irritating to eyes, respiratory system and skin. 
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed.
Safety Statements: 20/21-28-45-36/37/39-26-22 
S20:When using, do not eat or drink. 
S21:When using do not smoke. 
S28:After contact with skin, wash immediately with plenty of soap-suds. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S22:Do not breathe dust.
RIDADR: 2630
RTECS: VS7200000
HazardClass: 6.1
PackingGroup: I

DOT Classification:  6.1; Label: Poison, Corrosive

 Selenious acid, dipotassium salt (CAS NO.10431-47-7) is also called CCRIS 6885 ; Dipotassium selenite ; Potassium selenite ; Selenious acid, potassium salt (1:2) . Salts, basic, such as Selenious acid, dipotassium salt (CAS NO.10431-47-7) , are generally soluble in water. The resulting solutions contain moderate concentrations of hydroxide ions and have pH's greater than 7.0. They react as bases to neutralize acids. These neutralizations generate heat, but less or far less than is generated by neutralization of the bases in reactivity group 10 (Bases) and the neutralization of amines. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. Selenious acid, dipotassium salt (CAS NO.10431-47-7) is highly toxic. It may be fatal if inhaled, swallowed or absorbed through skin. People must avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution. Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Containers may explode when heated. Runoff may pollute waterways.