2439-01-2 Usage
Description
Chinomethionate, a quinoxaline fungicide and acaricide, was introduced in 1968 to control powdery mildew and spider mites on various crops. It is a non-systemic compound with contact activity only, characterized by its yellow crystal form and non-corrosive nature. Chinomethionate is soluble in benzene, toluene, and dioxane, but insoluble in water. It exhibits low toxicity to mammals, birds, and bees, while being highly toxic to fish and some aquatic invertebrates.
Uses
Used in Agricultural Industry:
Chinomethionate is used as a selective, non-systemic contact fungicide for the control of powdery mildews on a variety of crops. It provides both protective and eradicant control on fruits, cucurbits, vegetables, ornamentals, tobacco, and glasshouse crops.
Used in Pest Control:
Chinomethionate is used as an acaricide to control spider mites on various crops, including fruits, ornamentals, cucurbits, cotton, coffee, tea, tobacco, walnuts, and vegetables. Its acaricidal and fungicidal activities make it a valuable tool in integrated pest management strategies.
Air & Water Reactions
Hydrolyzed in alkaline solution.
Reactivity Profile
A member of the quinoxaline, dithiolane family.
Hazard
Toxic by ingestion and inhalation.
Flammability and Explosibility
Notclassified
Safety Profile
Moderately toxic by intraperitoneal, ingestion, and skin contact routes. A pesticide. When heated to decomposition it emits very toxic fumes of NOx and SOx.
Environmental Fate
Chemical/Physical. Reacts with ammonia forming 6-methyl-2,3-quinoxalinedithiol.
Metabolic pathway
Limited information is available to describe the degradation and metabolic
fate of chinomethionat. Hydrolytic cleavage of the dithiocarbonate
ring is the primary degradation reaction in water, plants and animals.
Degradation
Chinomethionat was degraded at pH 4,7 and 9 at 22 °C with DT50 values
of 10 days, 3.3 days and 3.6 hours, respectively. It is degraded under
alkaline conditions to yield 6-methyl-2,3-quinoxalinedithiol (2) (PM) as
shown in Scheme 1. Clark and Loeffler (1980) reported the extensive
photodegradation of chinomethionat in benzene in a nitrogen atmosphere
under UV light to yield dimeric condensation products and benzene
insertion products.
Mode of action
Chinomethionate reacts with sulfur-containing amino acids in proteins, thereby disrupting the function of many enzymes and other proteins. Because there is no single target site, target site resistance is unlikely.
Check Digit Verification of cas no
The CAS Registry Mumber 2439-01-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,4,3 and 9 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2439-01:
(6*2)+(5*4)+(4*3)+(3*9)+(2*0)+(1*1)=72
72 % 10 = 2
So 2439-01-2 is a valid CAS Registry Number.
InChI:InChI=1/C10H6N2OS2/c1-5-2-3-6-7(4-5)12-9-8(11-6)14-10(13)15-9/h2-4H,1H3
2439-01-2Relevant articles and documents
ACTIVE COMPOUND COMBINATIONS HAVING INSECTICIDAL AND ACARICIDAL PROPERTIES
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, (2010/08/18)
The novel active compound combinations comprising a compound of the formula (I-1) or (I-2) and the active compounds (1) to (26) listed in the description have very good insecticidal and acaricidal properties.
