Molecule structure of Tetra-n-propyl dithiopyrophosphate (CAS NO.3244-90-4) :

IUPAC Name: dipropoxyphosphinothioyloxy-dipropoxy-sulfanylidene-λ5-phosphane 
Molecular Weight: 378.425242 g/mol
Molecular Formula: C₁₂H₂₈O₅P₂S₂ 
Density: 1.173 g/cm³ 
Boiling Point: 381.6 °C at 760 mmHg 
Flash Point: 184.6 °C
Index of Refraction: 1.498
Molar Refractivity: 94.63 cm³
Molar Volume: 322.4 cm³
Polarizability: 37.51×10^-24 cm³
Surface Tension: 44.9 dyne/cm 
Enthalpy of Vaporization: 60.53 kJ/mol
Vapour Pressure: 1.1E-05 mmHg at 25 °C
XLogP3-AA: 6
H-Bond Acceptor: 5
Rotatable Bond Count: 14
Exact Mass: 378.085338
MonoIsotopic Mass: 378.085338
Topological Polar Surface Area: 46.2
Heavy Atom Count: 21
Complexity: 299
Canonical SMILES: CCCOP(=S)(OCCC)OP(=S)(OCCC)OCCC
InChI: InChI=1S/C12H28O5P2S2/c1-5-9-13-18(20,14-10-6-2)17-19(21,15-11-7-3)16-12-8-4/h5-12H2,1-4H3
InChIKey: IIDFEIDMIKSJSV-UHFFFAOYSA-N
EINECS: 221-817-0

EPA Genetic Toxicology Program.

Poison by intramuscular, intravenous, and intraperitoneal routes. Moderately toxic by ingestion and skin contact. When heated to decomposition it emits very toxic fumes of PO_x and SO_x. Used as a pesticide to control chinch bugs and sod webworm in lawns and on turfs.
Hazard Codes: Xn, N
Risk Statements: 21/22-50/53 
R21/22:Harmful in contact with skin and if swallowed. 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 36/37-60-61 
S36/37:Wear suitable protective clothing and gloves. 
S60:This material and its container must be disposed of as hazardous waste. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.
RIDADR: 3018
RTECS: XN4550000
HazardClass: 6.1(b)
PackingGroup: III

 Tetra-n-propyl dithiopyrophosphate (CAS NO.3244-90-4) is also called 4-01-00-01432 (Beilstein Handbook Reference) ;
Aspon ; BRN 1715467 ; Bis(O,O-di(N-propyl))phosphorothionic anhydride ; Bis-O,O-di-n-propylphosphorothionic anhydride ; Caswell No. 845A ; EPA Pesticide Chemical Code 079101 ; HSDB 1776 ; O,O,O,O-Tetra-n-propyl dithiopyrophosphate ; O,O,O,O-Tetrapropyl dithiopyrophosphate ; Propyl thiopyrophosphate ; Propyl thiopyrophosphate (((PrO)2P(S))2O) ; Tetrapropyl dithiopyrophosphate ; Tetrapropyl thiodiphosphate ; Tetrapropyl thiopyrophosphate (8CI) ; Tetrapropyldithiodifosfat [Czech] ; Thiodiphosphoric acid (((HO)2P(S))2O), tetrapropyl ester ; Thiodiphosphoric acid tetrapropyl ester (9CI) ; Thiopyrophosphoric acid (((HO)2PS)2O), tetrapropyl ester ; Thiopyrophosphoric acid, tetrapropyl ester . Tetra-n-propyl dithiopyrophosphate (CAS NO.3244-90-4) is high toxic. It will produce toxic phosphorus oxides and sulfur oxide gases when buring. So the storage environment should be ventilate, low-temperature and dry. Keep Tetra-n-propyl dithiopyrophosphate (CAS NO.3244-90-4) separate from raw materials of food.