L()-Ascorbic acid CAS 50-81-7

Ntseeg Tshuaj yog ib tug ua Tuam Tshoj L()-Ascorbic acid CAS 50-81-7 chaw tsim tshuaj paus, tsum thiab exporter. Ua raws li kev ua raws li cov khoom zoo tshaj plaws, kom peb cov L()-Ascorbic acid CAS 50-81-7 tau txaus siab los ntawm ntau tus neeg siv khoom. Shandong Ntseeg

Peb zoo ntawm qhov zoo ntawm cov khoom siv tshuaj lom neeg hauv thaj chaw. Peb cov khoom raug xa tawm mus rau Tebchaws Europe, Tebchaws Meskas, Nyiv, Kaus Lim Qab Teb, Sab Hnub Tuaj Asia thiab lwm lub tebchaws thiab cheeb tsam. Nrog rau kev tshawb fawb thiab thev naus laus zis raws li kev qhia, kev ncaj ncees raws li lub hauv paus, zoo li lub neej, thiab tso siab rau lub tswv yim kev lag luam ntawm kev tsim kho tshiab thiab kev loj hlob, peb cia siab tias yuav tsim kev sib pauv thiab kev koom tes nrog cov neeg siv khoom hauv tsev thiab txawv teb chaws los tsim kev vam meej!

L()-Ascorbic acid CAS 50-81-7 Tshuaj Specification

L( )-Ascorbic acid CAS 50-81-7 Cov Khoom Siv Tshuaj

Melting point 190-194 ° C (Lub Kaum Ob Hlis)
Kev sib hloov tshwj xeeb 20.5 º (C = 10, H2O)
Boiling point 227.71 ° C (kev kwv yees ntxhib)
Qhov ceev: 1.65g / cm3
Refractive index 21 ° (C = 10, H2O) fema2109 | ascorbicacid ua
Cia txias: 5 ° CTO 30 ° C
Solubility H2O: 50mg / mlat20 ° C, ntshiab, nyob ze tsis muaj xim
Daim ntawv: hmoov
Acidity coefficient (PKA) 4.04,11.7 (AT25 â,
Xim: dawb mus rau lub teeb daj
PH tus nqi: 3.59 (1mmsolution); 3.04 (10mMsolution); 2.53 (100mMSolution);
Tsis hnov ​​tsw (odorless) tsw
Discoloration ntawm acid-base qhia (pH tus nqi ntau: 1-2.5)
Kev ua haujlwm kho qhov muag [α] 25 / D19.0to23.0°, c = 10%inH2O
Dej solubility 333g / L (20 º C)

L()-Ascorbic acid CAS 50-81-7 Daim ntawv thov

Synthesis ntawm cov organic intermediates.