(R) – (+) – 2 – (4-Hydroxyphenoxy) Propionic Acid (HPPA)
Khoom Muag: (R) - (+) - 2 - (4-Hydroxyphenoxy) Propionic Acid (HPPA)
CAS#: 94050-90-5
Cov mis molecular: C9H10O4
Cov Qauv Qauv:
Siv: Nws yog siv rau hauv kev tsim cov tshuaj tua kab aryloxy phenoxy-propionates.
Cov Lus Qhia:
| Khoom | Tus Qauv |
| Qhov tsos | Dawb crystalline khoom |
| Kev ntsuam xyuas tshuaj lom neeg | ≥99.0% |
| Kev huv ntawm qhov muag | ≥99.0% |
| Qhov kub yaj | 143-147 ℃ |
| Cov dej noo | ≤0.5% |
Daim ntawv thov tshwj xeeb
Cov tshuaj tua kab nruab nrab; Nws yog siv ua cov khoom nruab nrab ntawm puma, cov tshuaj ua haujlwm siab Gaicao, jingwensha, jingquizalofop, alkyne ester thiab lwm yam tshuaj tua kab
Txoj kev tsim khoom
1. P-chlorobenzoyl chloride tau npaj los ntawm kev sib xyaw ntawm p-chlorobenzoyl chloride nrog anisole, ua raws li hydrolysis thiab demethylation.
2. Kev sib xyaw ntawm p-chlorobenzoyl chloride nrog phenol: yaj 9.4g (0.1mol) ntawm phenol hauv 4ml ntawm 10% sodium hydroxide kua, ntxiv 14ml (0.110mol) ntawm p-chlorobenzoyl chloride poob ntawm 40 ~ 45 ℃, ntxiv nws hauv 30 feeb, thiab sib xyaw ntawm tib qhov kub rau 1H. Txias rau chav sov, lim thiab ziab kom tau 22.3g ntawm phenyl p-Chlorobenzoate. Cov txiaj ntsig yog 96%, thiab qhov chaw yaj yog 99 ~ 101 ℃.
Kev kho mob thaum muaj xwm txheej ceev thaum xau dej
Cov kev ntsuas tiv thaiv, cov khoom siv tiv thaiv thiab cov txheej txheem pov tseg thaum muaj xwm txheej ceev rau cov neeg teb xov tooj:
Nws raug pom zoo kom cov neeg ua haujlwm kho mob thaum muaj xwm txheej ceev hnav cov khoom siv ua pa, cov khaub ncaws tiv thaiv hluav taws xob thiab cov hnab looj tes roj hmab uas tiv taus roj.
Tsis txhob kov lossis hla cov dej nchuav.
Txhua yam khoom siv uas siv thaum lub sijhawm ua haujlwm yuav tsum tau grounded.
Txiav qhov chaw uas xau dej ntau li ntau tau. Tshem tawm txhua qhov chaw uas ua rau hluav taws kub.
Thaj chaw ceeb toom yuav tsum tau xaiv raws li thaj chaw uas cuam tshuam los ntawm cov kua dej ntws, cov pa dej lossis cov hmoov av sib kis, thiab cov neeg ua haujlwm tsis muaj feem cuam tshuam yuav tsum tau tsiv mus rau thaj chaw nyab xeeb ntawm cua hla thiab cua sab saud.
Kev tiv thaiv ib puag ncig: tswj cov dej xau kom tsis txhob muaj kuab paug rau ib puag ncig. Tiv thaiv kom tsis txhob muaj dej xau nkag mus rau hauv cov kav dej phwj, dej saum npoo av thiab dej hauv av.
Cov hau kev khaws cia thiab tshem tawm cov tshuaj lom neeg thiab cov khoom siv pov tseg uas tau xau:
Cov dej xau me me: sau cov kua xau rau hauv lub thawv uas kaw tau kom deb li deb tau. Nqus nrog xuab zeb, cov pa roj carbon lossis lwm yam khoom siv tsis muaj zog thiab muab pov tseg rau qhov chaw nyab xeeb. Tsis txhob muab pov rau hauv cov kav dej phwj.
Qhov xau loj heev: ua ib lub qhov dej lossis khawb ib lub qhov rau kev txais. Kaw cov kav dej ntws. Ua npuas ncauj siv los npog cov dej ua pa. Muab xa mus rau lub tsheb thauj khoom lossis lub tshuab sau tshwj xeeb nrog lub twj tso kua mis uas tsis tawg, rov ua dua lossis thauj mus rau qhov chaw kho khib nyiab kom pov tseg.
Cov khoom siv tiv thaiv tus kheej:
Kev tiv thaiv kev ua pa: thaum cov pa ntau tshaj qhov tus qauv, hnav lub npog ntsej muag roj lim (ib nrab lub npog ntsej muag). Thaum cawm neeg lossis khiav tawm hauv qhov xwm txheej ceev, koj yuav tsum hnav lub tshuab ua pa.
Kev tiv thaiv tes: hnav cov hnab looj tes roj hmab uas tiv taus roj.
Kev tiv thaiv qhov muag: hnav cov khoom tiv thaiv kev nyab xeeb ntawm tshuaj lom neeg rau qhov muag.
Kev tiv thaiv daim tawv nqaij thiab lub cev: hnav khaub ncaws ua haujlwm tiv thaiv tshuaj lom nkag mus.
