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Chemical Identification
Common Name
Mepanipyrim
中文通用名
嘧菌胺
IUPAC
N-(4-methyl-6-prop-1-ynylpyrimidin-2-yl)aniline
CAS
4-methyl-N-phenyl-6-(1-propynyl)-2-pyrimidinamine
CAS No.
110235-47-7
Molecular Formula
C14H13N3
Molecular Structure
Category
Activity
Fungicide.Mepanipyrim is a foliar fungicide with preventative and residual activity. Some curative activity is reported. It has translaminar activity and gives good control of Botrytis cinerea on vines and vegetables; Venturia spp on apples and pears; and Monilinia spp on peaches. The product inhibits the infection process of B cinerea, especially germ tube elongation, secondary apressorium formation and penetration. Mepanipyrim has proved effective against benzimidazole-, carboximide- and N-phenylcarbamate-resistant strains of B cinerea.

The product is non-phytotoxic to target crops at the recommended dose rates and does not harm beneficial insects.

In field trials, mepanipyrim gave better control of diseases at lower rates than standard fungicides.

On pome fruit, mepanipyrim is applied at the stages from bud burst to flowering. On grapes, it is applied after the berry clusters are formed.
CropUse
CropUses:
apples, aubergines, beans, blackcurrants, bulbs, chicory, citrus, cucumbers, endive, lettuce, ornamentals, peaches, pears, raspberries, roses, salad vegetables, strawberries, tomatoes, vegetables, vines

apples

250-500 g ai/ha

stone fruits

250-500 g ai/ha

strawberries

400 g ai/ha

Physical Properties
Molecular weight:223.3; Physical form:White crystals/powder. Density:1.2025; Composition:Tech. is >94%. Melting point:132.8 °C; Vapour pressure:2.32 × 10-2 mPa (20 °C); Henry constant:1.67 × 10-3 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 3.28 (20 °C); Solubility:In water 3.10 mg/l (20 °C). In acetone 139, methanol 15.4, n-hexane 2.06 (all in g/l, 20 °C).; Stability:Stable in water ( DT50 >1 y at pH 4-9). Stable to heat (no change over 14 d at 55 °C). Stable to light in water ( DT50 12.9 d).;
Toxicology
Oral:Acute oral LD50 for rats and mice >5000 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats >2000 mg/kg. Non-irritating to skin and eyes (rabbits). Non-sensitising to skin (guinea pigs). Inhalation: LC50 (4 h, whole body) for rats >0.59 mg/l.
Environmental Profile
Ecotoxicology:?
Algae: EC50 (96 h) for Selenastrum capricornutum 1.3 mg/l.Bees: LC50 (oral) >1000 mg/l diet; (contact) >100 mg/bee.Birds:Acute oral LD50 for bobwhite quail and mallard ducks >2250 mg/kg. Dietary LC50 (5 d) for bobwhite quail and mallard ducks >5620 mg/ kg diet.Daphnia: LC50 (24 h) for D. carinata 5.0 mg/l.Fish: LC50 (96 h) for bluegill sunfish 3.8, rainbow trout 3.1 mg/l.Worms: LC50 (14 d) for Eisenia foetida >1000 mg/ kg soil.?

Environmental fate:?
Animals:In rats, 96-100% of the dose was excreted via faeces and urine within 96 h. Mepanipyrim was degraded into several metabolites.Plant:Major metabolites were 2-hydroxypropyl-, 2,3-dihydroxypropyl- and 4-hydroxyphenyl- derivatives of mepanipyrim.
Transport Information
Signal Word:WARNING; Hazard Class:II(Moderately hazardous)

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