Thymolphthalein CAS 125-20-2

CAS:125-20-2

Ilana molikula:C28H30O4

Ìwúwo molikula:430.54

Nọmba EINECS:204-729-7

Itumọ ọrọ:3,3-bis (4-hydroxy-2-methyl-5- (1-methylethyl) phenyl) -1 (3H) -Isobenzofuranone; 3,3-bis [4-hydroxy-2-methyl-5- (1-methylethyl) phenyl] -1 (3h) -isobenzofuranon; Thymolphthalein,foranalysisACS;Thymolphthalein,itọkasi,funfun; THYMOLPHTHALEINREAGENT(ACS); THYMOLPHTHALEINSOLUTION

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Kini Thymolphthalein CAS 125-20-2?

Orukọ ijinle sayensi Thymolphthalein jẹ "3,3-bis(4-hydroxy-5-isopropyl-2-methylphenyl) -phthalide", eyiti o jẹ reagent Organic. Ilana kemikali jẹ C28H30O4, ati iwuwo molikula jẹ 430.54. O ti wa ni a funfun okuta lulú. O jẹ irọrun tiotuka ni ether, acetone, sulfuric acid ati awọn solusan ipilẹ, ati insoluble ninu omi. Nigbagbogbo a lo bi itọka ipilẹ-acid, ati iwọn iyipada awọ pH rẹ jẹ 9.4-10.6, ati pe awọ naa yipada lati laisi awọ si buluu. Nigbati o ba lo, o nigbagbogbo pese sile sinu ojutu 0.1% 90% ethanol. O tun jẹ igbaradi nigbagbogbo pẹlu awọn afihan miiran lati ṣe afihan itọka apapọ onirẹlẹ lati jẹ ki iwọn iyipada awọ rẹ dinku ati akiyesi akiyesi.

Sipesifikesonu

Nkan	ITOJU	Àbájáde
Idanimọ	Funfun si pa-funfun lulú	Ibamu
¹H-NMR	Aami julọ.Oniranran pẹlu itọkasi	Kọja
HPLC ti nw	≥98%	99.6%
Pipadanu lori gbigbe	1% ti o pọju	0.24%

Ohun elo

Thymolphthalein ni a maa n lo gẹgẹbi itọka-ipilẹ acid, pẹlu iwọn iyipada awọ pH ti 9.4 si 10.6, ati iyipada awọ lati awọ-awọ si buluu. Nigbati o ba lo, o nigbagbogbo pese sile bi ojutu ethanol 0.1% 90%, ati pe nigbagbogbo ni idapo pẹlu awọn itọka miiran lati ṣe afihan alapọpọ lati jẹ ki iyipada awọ rẹ dín ati ki o han gbangba lati ṣe akiyesi. Fun apẹẹrẹ, itọka ti a ṣe nipasẹ didapọ 0.1% ethanol ojutu ti reagent yii pẹlu 0.1% ethanol ojutu ti phenolphthalein ko ni awọ ninu ojutu ekikan, eleyi ti ni ojutu ipilẹ, ati dide ni pH 9.9 (ojuami iyipada awọ), eyiti o jẹ rọrun pupọ lati ṣe akiyesi.