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PYRAZOPHOS

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PYRAZOPHOS Basic information

Product Name:
PYRAZOPHOS
Synonyms:
  • AFUGAN
  • Afugan powder
  • AFUGAN(R)
  • ETHYL-2-DIETHOXYPHOSPHINOTHIOYLOXY-5-METHYLPYRAZOLO[1,5-A]-PYRIMIDINE-6-CARBOXYLATE
  • PYRAZOPHOS
  • Pyrazophos emulsion(content>15%)
  • Pyrazophos powder(content>55%)
  • O,O-DIETHYL-O-6-ETHOXYCARBONYL-5-METHYL-PYRAZOLO [1,5-A]PYRIMIDIN-2-YL-PHOSPHOROTHIONATE
CAS:
13457-18-6
MF:
C14H20N3O5PS
MW:
373.36
EINECS:
236-656-1
Product Categories:
  • OrganophosphorusAlphabetic
  • Fungicides
  • P
  • Pesticides
  • PU - PZ
  • Alpha sort
  • N-PPesticides
  • Pesticides&Metabolites
Mol File:
13457-18-6.mol
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PYRAZOPHOS Chemical Properties

Melting point:
51℃
vapor pressure 
2.2 x 10-4 Pa (50 °C)
storage temp. 
APPROX 4°C
form 
neat
Water Solubility 
4.2 mg l-1 (25 °C)
Merck 
13,8052
BRN 
577209
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Safety Information

Hazard Codes 
Xn,N
Risk Statements 
20/22-50/53
Safety Statements 
36/37-46-60-61
RIDADR 
2783
WGK Germany 
3
RTECS 
TF2035000
HazardClass 
6.1(b)
PackingGroup 
III
Toxicity
LD50 in rats, marmots, rabbits (mg/kg): 140, 184, 435 orally (Smit)
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PYRAZOPHOS Usage And Synthesis

Uses

Fungicide.

Uses

Pyrazophos is a systemic fungicide that provides both protective and curative control of various fungal diseases such as powdery mildew (Podosphaera) on apples, stone fruits, bush fruits and strawberries, Erysiphe in cucurbits and tomatoes, Uncinula on vines and leaf blotch (Rhynchosporium) in cereals.

Definition

ChEBI: A member of the class of pyrazolopyrimidines that is the ethyl ester of 2-[(diethoxyphosphorothioyl)oxy]-5-methylpyrazolo[1,5-a]pyrimidine-6-carboxylic acid. A fungicide used to control Erysiphe, Helminthosporium and ital>Rhynchospium in cereals.

Metabolic pathway

Limited information is available to describe the degradation and metabolic fate of pyrazophos. Hydrolytic cleavage of the P-O-pyrazolopyrimidine linkage is the primary metabolic pathway. Oxidative desulfuration of pyrazophos to pyrazophos-oxon is only a minor pathway, observed in the plant metabolism study (Scheme 1).

Degradation

Pyrazophos (1) is hydrolysed in acidic or alkaline solution (PM).

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