Hauj lwm lawm
Kev tsis
Khoom Taw Qhia luv luv
Khoom npe: Sodium Selenite Pentahydrate
CAS: 26970-82-1 Nr
MF: H10Na2O8Se
PIB: 263.01
Khoom Specification
|
Qhov tshwm sim |
Dawb crystalline hmoov, hygroscopic |
|
Kev txheeb xyuas |
Dissolve 50mg nyob rau hauv 5ml ntawm ib tug sib tov ntawm vaj huam sib luag ntim ntawm dilute hydrochloric acid R thiab dej R thiab cua sov rau boiling. Ntxiv 0.05g ntawm ascorbic acid R; ib tug liab precipitate yog tsim uas tej zaum yuav dub. |
|
Solubility |
Dawb soluble hauv dej, xyaum insoluble hauv ethanol |
|
Qhov tshwm sim ntawm kev daws teeb meem |
Ntshiab thiab tsis muaj xim |
|
PH |
9.8-10.8 |
|
Chloride (Cl-) |
Tsawg dua lossis sib npaug li 0.005% |
|
Selenate thiabSulphate |
Tsawg dua lossis sib npaug li 0.03% |
|
Hlau |
Tsawg dua lossis sib npaug li 0.005% |
|
Selenium |
Ntau dua lossis sib npaug li 29.72% |
|
Cov ntsiab lus |
98.5%~101.5% |
