Aspon

Agent Name
Aspon
CAS Number
3244-90-4
Formula
C12-H28-O5-P2-S2
Major Category
Pesticides
Aspon formula graphical representation
Synonyms
A 42; A 42 (VAN); ASP 51; Bis(O,O-di(n-propyl))phosphorothionic anhydride; Bis-O,O-di-n-propylphosphorothionic anhydride; E 8573; NPD; O,O,O,O-Tetra-n-propyl dithiopyrophosphate; O,O,O,O-Tetrapropyl dithiopyrophosphate; Propyl thiopyrophosphate; Propyl thiopyrophosphate (((PrO)2P(S))2O); Stauffer ASP-51; Tetra-n-propyl dithionopyrophosphate; Tetra-n-propyl dithiopyrophosphate; 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; [ChemIDplus]
Category
Organophosphate Insecticides
Description
Straw to amber-colored liquid; [HSDB] Amber liquid; [MSDSonline]
Sources/Uses
Used as insecticide and acaricide to protect lawns and turf; [HSDB]
Comments
Depressed cholinesterase activity in 90-day feeding study of rats at doses below lethal levels; Showed no evidence of mutagenicity; [HSDB] Effects in high-dose animal studies include convulsions and inhibition of true cholinesterase; [RTECS] “The average of two baseline respective cholinesterase activity determinations three days apart, with no exposures to enzyme inhibiting pesticides for at least 30 days, is recommended for each worker prior to exposure to cholinesterase inhibitors because of large inter-individual differences in published baseline values. To be established at least once a year. Removal from workplace exposures is recommended until the cholinesterase activity returns to within 20% of baseline.” [TLVs and BEIs]
Restricted
Cancelled--no longer registered as a pesticide for use in the US; [HSDB]
Biomedical References

Exposure Assessment

BEI
Acetylcholinesterase activity in red blood cells = 70% of individual's baseline; Butylcholinesterase activity in serum or plasma = 60% of individual's baseline; Sample at end of shift; [TLVs and BEIs]
Vapor Pressure
1.07E-05 mm Hg
Explanatory Notes
Flash point = 149 deg C; [HSDB]

Adverse Effects

Other Poison
Organophosphate

Diseases, Processes, and Activities Linked to This Agent

Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: