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CAS Number: 122008-85-9
English name: Cyhalofop-butyl
English synonyms: XDE537;Cyhalofop-buty;CYHALOFOP-BUTYL;cyhalofopbutylester;cyhalofop-butyl(paiso,ansi);Cyhalofop-butylSolution,1000ppm;Cyhalofop-butyl100mg[122008-85-9];BUTYL(R)-2-[4 -CYANO-2-FLUOROPHENOXY)PHENOXY]PROPIONATE;(R)-butyl2-(4-(4-Chemicalbookcyano-2-fluorophenoxy)phenoxy)propanoate;Butyl-(R)-2-[4-(4-cyano-2 -fluorophenoxy)phenoxy]propionate
Chinese name: cyhalofop-butyl Chinese synonyms: cyhalofop-butyl; cyhalofop-butyl in n-hexane; cyhalofop-butyl (qin); standard of cyhalofop-butyl in hexane; cyhalofop-butyl solution, 1000PPM; ( R)-2-[4(4-cyano-2-fluorophenoxy)phenoxy]-butyl propionate; (R)-2-[4-(4-cyano-2-fluorophenoxy) Yl)phenoxy)butyl propionate CBNumber:CB1691661
Molecular formula: C20H20FNO4
Molecular weight: 357.38
Cyhalofop-butyl Chemical propertiesMelting point: 47.0to51.0°C
Boiling point: 449.1±45.0°C(Predicted)
Flash point: 122℃
Storage conditions: 0-6°C
Safety information dangerous goods signs: Xn, N
Dangerous category code: 22-50
Safety instructions: 61
Dangerous goods transportation number: UN30779/PGIIIWGKGermany: 3HazardClasChemicalbooks: 9PackingGroup: III
Customs code: 29269090
Hazardous Substances Data: 122008-85-9 (HazardousSubstancesData)
Stability Cyhalofop-butyl is relatively stable under acidic conditions, but under slightly acidic and neutral conditions, the hydrolysis rate is accelerated. Under strong alkaline conditions, cyhalofop-butyl hydrolyzes rapidly; in the range of 25℃～65℃ , With the increase of temperature, the hydrolysis rate of cyhalofop-butyl accelerates, and the degradation rate at 25℃(pH5.0) is only 14% of that at 65℃. ACID is relatively stable under acidic and neutral conditions. It is slowly hydrolyzed under weak alkaline conditions. Only under strong alkaline conditions can the hydrolysis be faster. Increasing the temperature can accelerate its hydrolysis. When it rises from 25°C to 35°C, the rate of hydrolysis The constant k increases by about 1 to 2 times.
This product is a selective systemic and conductive stem and leaf treatment agent for paddy fields. The medicament is absorbed through plant stems and leaves, and spread to growth points and meristems. It inhibits fatty acid synthesis in weeds, causing the weeds to die gradually after they stop growing, but in rice, they can be quickly degraded into inactive diacid states. Highly safe for rice. This agent can be used in rice fields with various planting methods (such as dry seedlings, water seedlings, direct seeding, transplanting, throwing seedlings, etc.), and has the characteristics of wide application period, low dosage, and safety for subsequent crops. It can effectively control grass weeds such as barnyardgrass and stephanotis. It also has a good control effect on barnyardgrass.
Spray 50-70 grams per mu of stems and leaves. If the grass age is too old, increase the dosage appropriately. It is recommended to use 1 bottle per mu.
1. This product is used for the treatment of rice stems and leaves. The transplanting field and the seedling throwing field should be after the transplanted seedlings return to green. The direct seeding field and the seedling field should be after the three leaves of the rice seedlings and the 2-5 leaf stage of the weeds such as sedge. It is 20-30 kg/mu, and spray evenly with fine droplets. It is recommended to use the medicine in the evening.
Degradation of microorganisms in water can effectively promote the degradation of cyhalofop-butyl. Cyhalofop-butyl has a certain stimulating effect on the growth of certain bacteria in the pool water, but has little effect on the growth of actinomycetes and fungi. Through the cultivation of different species of bacteria and the identification of Chemicalbook, it is found that the degradation microorganisms of cyhalofop-butyl in pond water are mainly Pseudomonas and Staphylococcus, and the metabolic mechanism may be mainly growth metabolism. In summary, the results of indoor and outdoor degradation studies on cyhalofop-butyl have shown that cyhalofop-butyl degrades rapidly in the natural environment and has a short residual period. It is not safe for rice and its environment when applied at conventional concentrations. Cyhalofop-butyl can end up in the rice field ecosystem in many ways, but mainly biodegradation and photolysis, followed by hydrolysis; about the safety of cyhalofop-butyl to organisms and its series of degradation products The environmental and ecological toxicology of the country needs further research.
Application Mainly used in rice seedling field, direct seeding field, transplanting field, to control most vicious gramineous weeds such as barnyardgrass, stephanotis, goosegrass, etc., and can effectively control quinclorac, sulfonylureas and amides Herbicides produce resistant weeds.
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