ascorbic acid zoo hmoov (100 mesh)
nta:
Qhia cov lom ua si ntawm ascorbic acid tebchaw paub, yog ib tug dej-soluble vitamins, txiv hmab txiv ntoo thiab zaub muaj ntau. Nyob rau hauv redox tshua tswj cov metabolism hauv cov tsis muaj nws yuav ua rau scurvy
KHOOM | KEV |
tsos | Dawb los yog yuav luag dawb siv lead ua los yog crystalline hmoov |
Identification | zoo |
melting point | 191 ℃ ~ 192 ℃ |
pH (5%, w / v) | 2.2 ~ 2.5 |
pH (2%, w / v) | 2.4 ~ 2.8 |
Kev kho qhov muag sib hloov | + 20.5 ° ~ + 21.5 ° |
Clarity ntawm cov tshuaj | Clear |
Heavy hlau | = <0,0003% |
Tshuaj ntsuam (raws li C 6H 8O6,%) | 99,0 ~ 100,5 |
Tooj | = <3 mg / kg |
Hlau | = <2 mg / kg |
mercury | = <1 mg / kg |
arsenic | = <2 mg / kg |
Lead | = <2 mg / kg |
Oxalic acid | = <0.2% |
Poob rau kom qhuav | = <0.1% |
Sulphated tshauv | = <0.1% |
Qhov seem kuab tshuaj (raws li methanol) | = <500 mg / kg |
Tag nrho cov phaj count (CFU / g) | = <1000 |
Yeasts & pwm (CFU / g) | = <100 |
Escherichia. Coli / g | qhaj ntawv |
Salmonella / 25g | qhaj ntawv |
Staphylococcus aureus / 25g | qhaj ntawv |