Disodium ethylene-diamine-tetra-acetate
CAS Nr.: 139-33-3
Synonyms: edta-2na disodium EDTA; isodium edetate
Lub cev thiab tshuaj muaj zog
Dawb crystalline particles thiab hmoov, tsw, tasteless, yooj yim soluble nyob rau hauv dej, me ntsis soluble nyob rau hauv ethanol, thiab insoluble nyob rau hauv ether. Tus nqi pH ntawm 2 feem pua aqueous tov yog 4.7, thiab nws ruaj khov ntawm qhov kub thiab txias. Thaum 100 degree, cov dej siv lead ua pib volatilize, thiab ntawm 120 degree, nws poob cov dej siv lead ua thiab ua anhydrous.
Nws muaj hygroscopicity, thiab lub melting point yog 240 degree (decomposition). Edta-2na muaj ntau yam kev sib koom tes thiab tuaj yeem tsim cov chelates ruaj khov nrog yuav luag tag nrho cov hlau ions. Feem ntau ntawm cov chelates raug them, yog li lawv tuaj yeem yaj hauv dej thiab hnov mob sai. Nws yog npaj los ntawm reacting ethylenediamine nrog monochloroacetic acid, ces reacting nrog formaldehyde thiab sodium cyanide, thiab ces neutralizing nrog sodium carbonate; Los yog los ntawm cov tshuaj tiv thaiv ntawm EDTA nrog sodium hydroxide thiab lub cev qhuav dej, filtration thiab neutralization.
Toxicological hauv paus
①GRAS:FDA-21CFR 172.135.
② LD50: (rat, mob qhov ncauj) 2G / kg (BW).
③ADI: 0-2.5mg/kg (bw) (FAO/WHO, 1994).
Daim ntawv thov
Stabilizer, coagulant, antioxidant thiab antiseptic
GB {{0}}} qhia tias qhov siab tshaj plaws ntawm cov txiv hmab txiv ntoo khaws cia (tsuas yog rau cov khw muag qos yaj ywm qab zib), zaub qhwv, zaub hauv kaus poom, cov kaus poom txiv ntoo thiab cov noob, thiab cov nplej hauv kaus poom yog 0.25g/kg ; Jam, zaub paste (sauce), tshwj tsis yog cov kua txiv lws suav, qhov siab tshaj plaws yog 0.07g / kg; Compound seasoning, ntau npaum li cas 0.075g / kg; Rau cov dej haus (tshwj tsis yog 14.01 ntim dej haus), qhov siab tshaj plaws yog 0.03g / kg.
Cov khoom no tuaj yeem chelate nrog hlau, tooj liab, calcium, magnesium thiab lwm yam ions ntau yam los tsim cov dej-soluble complexes ruaj khov, thiab tuaj yeem chelate nrog cov khoom siv hluav taws xob xws li yttrium, zirconium thiab radium.
Tsis tas li ntawd, cov khoom no kuj muaj cov nyhuv antioxidant thiab muaj txiaj ntsig tseem ceeb. Nyob rau hauv kev siv tswv yim, nws yog siv los tiv thaiv discoloration, deterioration, turbidity thiab oxidation poob ntawm vitamin C los ntawm hlau. Cov khoom no muaj cov nyhuv synergistic nrog phosphate. Raws li tus neeg sawv cev kho dej, nws tuaj yeem tiv thaiv qhov tsis zoo ntawm calcium, magnesium, hlau, manganese thiab lwm yam hlau ions hauv dej.
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