MSPI (nerve agent)

MSPI

Names
Other names MSMPID
Identifiers
CAS Number	70951-04-1
3D model (JSmol)	Interactive image
ChemSpider	46405
PubChem CID	51213
CompTox Dashboard (EPA)	DTXSID90221186
InChI InChI=1S/C5H9N2O2PS/c1-6-3-4-7(5-6)10(8,9)11-2/h3-5H,1-2H3 Key: QSLFDILMORXPKP-UHFFFAOYSA-N
SMILES C[N+]1=CN(C=C1)P(=O)([O-])SC
Properties
Chemical formula	C5H9N2O2PS
Molar mass	192.17 g·mol−1
Hazards
Lethal dose or concentration (LD, LC):
LD50 (median dose)	3.15 mg/kg (mice, subcutaneous)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

MSPI is an irreversible acetylcholinesterase inhibitor. MSPI reacts with the acetylcholinesterase to form an aged enzyme adduct that can't be reactivated by cholinesterase reactivators.

See also

• EA-2192
• Guanitoxin