Thymolphthalein CAS 125-20-2
Thymolphthalein lub npe scientific yog "3,3-bis (4-hydroxy-5-isopropyl-2-methylphenyl)-phthalide", uas yog cov organic reagent. Cov mis mos yog C28H30O4, thiab qhov hnyav molecular yog 430.54. Nws yog dawb crystalline hmoov. Nws yooj yim soluble hauv ether, acetone, sulfuric acid thiab alkaline daws, thiab insoluble hauv dej. Nws feem ntau yog siv los ua cov kua qaub-puag qhia, thiab nws cov xim hloov pauv pH yog 9.4-10.6, thiab cov xim hloov ntawm tsis muaj xim mus rau xiav. Thaum siv, nws yog feem ntau npaj rau hauv 0.1% 90% ethanol tov. Nws kuj yog feem ntau npaj nrog rau lwm cov ntsuas los tsim ib qho kev sib xyaw ua ke ua ke kom nws cov xim hloov ntau nqaim dua thiab pom pom tseeb dua.
| Yam khoom | STANDARD | TSEEM CEEB |
| Kev txheeb xyuas | Dawb mus rau dawb hmoov | Ua raws |
| 1H-NMR | Zoo tib yam spectrum nrog siv | Hla |
| purity ntawm HPLC | ≥98% | 99.6% |
| Poob rau ziab | 1% max | 0.24% |
Thymolphthalein feem ntau yog siv los ua cov kua qaub-puag qhia, nrog pH xim hloov ntau ntawm 9.4 txog 10.6, thiab xim hloov ntawm tsis muaj xim mus rau xiav. Thaum siv, nws yog feem ntau npaj raws li 0.1% 90% ethanol tov, thiab feem ntau yog tov nrog lwm cov ntsuas los ua ib qho kev qhia sib xyaw kom nws cov xim hloov ntau dua thiab pom tseeb. Piv txwv li, qhov ntsuas tau ua los ntawm kev sib xyaw 0.1% ethanol daws ntawm cov tshuaj no nrog 0.1% ethanol tov ntawm phenolphthalein yog xim tsis muaj xim hauv cov kua qaub, ntshav hauv cov tshuaj alkaline, thiab sawv ntawm pH 9.9 (xim hloov pauv), uas yog yooj yim heev los soj ntsuam.
Cov khoom yog ntim rau hauv lub hnab, 25kg / nruas
Thymolphthalein CAS 125-20-2
Thymolphthalein CAS 125-20-2
