Common name: hydramethylnon
Chemical name:
5,5-dimethylperhydropyrimidin-2-one-4-trifluoromethyl-alpha-(4-trifluoromethylstyryl)-cinnamylidenehydrazone
Molecular formula: C
25H
24F
6N
4
Molecular weight: 494.5
Chemical class: trifluoromethyl aminohydrazone insecticide
CAS No.: 67485-29-4
Properties:
Form: Yellow to tan crystals
Melting point: 189-191
oC vapour pressure: 2.7 x 10-3MPa (25
oC)
Solubility in water: 0.005-0.007mg/l, 20
oC)
Solubility in solvents: In acetone 360, ethanol 72, 1, 2-dichloroethane 170, methanol 230, isopropanol 12, xylene 94, chlorobezene 390 (all in g/L, 20
oC)
Stability: undergoes photolysis sunlight
Toxicity:
Acute oral LD50 for rats: male 1,311mg/kg, female 1,300mg/kg
Acute dermal LD50 for rats: >5,000mg/kg
Inhalation for rats LC50: >5mg/L
Non-irritating to skin, reversible irritating to eyes
Ecotoxicology:
Effects on aquatic organisms: rainbow trout 0.16 mg/l, carp 0.67mg/l, bluegill sunlight >1.7mg/L
(96h), daphnia EC50 1.14mg/L (48h)
Effects on bees: LD50 0.03mg/bee
Effects on birds: bobwhite quail LD50 1,828mg/kg, mallard ducks LD50 >2,510mg/kg
Environmental fate: hydramethylnon is of low persistence in the soil environment; soil half-lives of 7 to 28 days. Hydramethylnon is only slightly soluble in water and is very strongly sorbed by soil organic matter and clay particles, it is not appreciably mobile in most soils.
Mode of action:
Site electron transport inhibitor. Inhibits cellar respiration. Non-systemic insecticide with stomach action.
Usage:
Selective control of agricultural and household formicidae, kalotermitidae and rhinotermitidae using bait. Due to slow action, can be carried into nest by aorker ants and kill the queen.
