Molecular structure of Potassium thiosulphate (CAS NO.10294-66-3):

Molecular Weight: 190.3248 g/mol
Molecular Formula: K₂O₃S₂ 
Density: 1.484 g/mL at 25 °C
Stability: Stable. Incompatible with strong acids, strong oxidizing agents.
H-Bond Acceptor: 3
Exact Mass: 189.856299
MonoIsotopic Mass: 189.856299
Topological Polar Surface Area: 63.2
Heavy Atom Count: 7 
Canonical SMILES: [O-]S(=O)(=S)[O-].[K+].[K+]
InChI: InChI=1S/2K.H2O3S2/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2
InChIKey: FGRVOLIFQGXPCT-UHFFFAOYSA-L
EINECS: 233-666-8
Product Categories: Inorganics;Inorganic Salts;Potassium;Synthetic Reagents

 Potassium thiosulphate (CAS NO.10294-66-3) is used as analytical reagent and reducing agent, but also for the pharmaceutical industry.

Reported in EPA TSCA Inventory.

When heated to decomposition it emits toxic fumes of SO_x and K₂O.
Hazard Codes of Potassium thiosulphate (CAS NO.10294-66-3): Xi
Risk Statements: 36/38
36/38: Irritating to eyes and skin 
Safety Statements: 26-36
26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
36: Wear suitable protective clothing

 Potassium thiosulphate (CAS NO.10294-66-3) is also named as Thiosulfuric acid (H₂S₂O₃), dipotassium salt ; Thiosulfuric acid (H₂S₂O₃), potassium salt (1:2) . It is white crystalline powder.