(R) - (+) - 2 - (4-Hydroxyphenoxy) Propionic Acid (HPPA)
Khoom Muag: (R) - (+) - 2 - (4-Hydroxyphenoxy) Propionic Acid (HPPA)
CAS Nr .: 94050-90-5
Molecular Formula: C9H10O4
Cov qauv qauv:
Kev Siv: Nws yog siv rau hauv kev sib txuas ntawm aryloxy phenoxy-propionates herbicide.
Specifications:
| Yam khoom | Txuj |
| Qhov tshwm sim | Dawb crystalline khoom |
| Tshuaj ntsuam xyuas | ≥99.0% |
| Optical purity | ≥99.0% |
| Melting point | 143-147 ℃ |
| Moisture | ≤0.5% |
Daim ntawv thov tshwj xeeb
Cov tshuaj tua kab nruab nrab; Nws yog siv los ua ib qho nruab nrab ntawm puma, kev ua haujlwm siab Gaicao, jingwensha, jingquizalofop, alkyne ester thiab lwm yam tshuaj tua kab mob.
Txoj kev tsim khoom
1. P-chlorobenzoyl chloride tau npaj los ntawm cov tshuaj tiv thaiv ntawm p-chlorobenzoyl chloride nrog anisole, ua raws li hydrolysis thiab demethylation.
2. Cov tshuaj tiv thaiv p-chlorobenzoyl chloride nrog phenol: yaj 9.4g (0.1mol) ntawm phenol hauv 4ml ntawm 10% sodium hydroxide tov, ntxiv 14ml (0.110mol) ntawm p-chlorobenzoyl chloride dropwise ntawm 40 ~ 45 ℃, ntxiv rau hauv 30min, thiab hnov mob ntawm qhov kub thiab txias rau 1H. Txias rau chav sov, lim thiab qhuav kom tau 22.3g ntawm phenyl p-Chlorobenzoate. Cov txiaj ntsig yog 96%, thiab cov ntsiab lus melting yog 99 ~ 101 ℃.
Kev kho mob xwm txheej ceev
Kev tiv thaiv, cov cuab yeej tiv thaiv thiab cov txheej txheem pov tseg thaum muaj xwm ceev rau cov neeg ua haujlwm:
Nws raug pom zoo tias cov neeg ua haujlwm kho mob xwm txheej ceev yuav tsum hnav cov cuab yeej ua pa, cov khaub ncaws tiv thaiv zoo li qub thiab cov hnab looj tes roj hmab.
Tsis txhob kov lossis hla qhov nchuav.
Tag nrho cov cuab yeej siv thaum lub sijhawm ua haujlwm yuav tsum yog hauv av.
Txiav tawm qhov chaw ntawm cov dej ntws tawm kom ntau li ntau tau. Tshem tawm tag nrho cov khoom siv hluav taws xob.
Qhov chaw ceeb toom yuav tsum raug xaiv raws li thaj chaw cuam tshuam los ntawm cov kua dej ntws, chav dej lossis plua plav tawm, thiab cov neeg ua haujlwm tsis cuam tshuam yuav tsum tau khiav mus rau thaj chaw nyab xeeb los ntawm kev hla cua thiab cua.
Kev tiv thaiv ib puag ncig: muaj cov xau kom tsis txhob muaj kuab paug ib puag ncig. Tiv thaiv kom tsis txhob nkag mus rau hauv cov kav dej, dej thiab dej hauv av.
Txoj kev khaws cia thiab tshem tawm cov tshuaj xau thiab pov tseg cov ntaub ntawv siv:
Kev xau me me: sau cov kua xau rau hauv lub thawv ntim khoom kom deb li deb tau. Nqus nrog xuab zeb, activated carbon los yog lwm yam khoom siv inert thiab hloov mus rau qhov chaw nyab xeeb. Tsis txhob ntws mus rau hauv lub kav dej.
Kev xau loj heev: tsim lub dike lossis khawb lub qhov rau kev txais tos. Kaw cov kav dej. Ua npuas ncauj yog siv los npog evaporation. Hloov mus rau lub tsheb tank lossis cov khoom tshwj xeeb nrog lub twj tso kua mis tawg, rov ua dua lossis thauj mus rau qhov chaw kho mob pov tseg.
Cov khoom siv tiv thaiv tus kheej:
Kev tiv thaiv kev ua pa: thaum qhov concentration hauv huab cua tshaj li tus qauv, hnav lub ntsej muag roj lim (ib nrab daim npog ntsej muag). Thaum cawm lossis khiav tawm thaum muaj xwm txheej ceev, koj yuav tsum hnav lub tshuab ua pa.
Kev tiv thaiv tes: hnav roj hmab roj hmab hnab looj tes.
Kev tiv thaiv qhov muag: hnav tshuaj tiv thaiv kev nyab xeeb qhov muag.
Kev tiv thaiv ntawm daim tawv nqaij thiab lub cev: hnav khaub ncaws ua haujlwm tiv thaiv tshuaj lom.
