EDTA Disodium (EDTA-2Na) | 139-33-3 ib
Khoom Description
Ethylenediaminetetraacetic acid, dav abbreviated li EDTA, yog ib qho aminopolycarboxylic acid thiab tsis muaj xim, dej-soluble khoom. Nws lub hauv paus conjugate yog hu ua ethylenediaminetetraacetate. Nws yog dav siv los yaj limescale. Nws qhov txiaj ntsig tshwm sim vim nws lub luag haujlwm ua hexadentate ("rau-toothed") ligand thiab chelating tus neeg sawv cev, piv txwv li nws muaj peev xwm "sequester" hlau ions xws li Ca2+ thiab Fe3+. Tom qab raug khi los ntawm EDTA, hlau ions tseem nyob hauv kev daws tab sis pom muaj qhov txo qis qis. EDTA yog tsim los ua ntau cov ntsev, tshwj xeeb yog disodium EDTA thiab calcium disodium EDTA.
Specification
| Yam khoom | STANDARD |
| Qhov tshwm sim | Dawb crystalline hmoov |
| Kev txheeb xyuas | Pass xeem |
| Kev ntsuam xyuas (C10H14N2Na2O8.2H2O) | 99.0% ~ 101.0% |
| Chloride (Cl) | = <0.01% |
| Sulfate (SO4) | = <0.1% |
| pH (1%) | 4.0-5.0 Nws |
| Nitrilotriacetic acid | = <0.1% |
| Calcium (Ca) | Tsis zoo |
| Ferrum (Fe) | = <10 mg/kg |
| Lead (Pb) | = <5 mg/kg |
| Arsenic (As) | = <3 mg/kg |
| Mercury (Hg) | = <1 mg/kg |
| Cov hlau hnyav (raws li Pb) | = <10 mg/kg |
