D(-)-Tartaric acid/ CAS：526-83-0
Kev Piav Qhia Luv:
Lub npe khoom: D(-)-Tartaric acid
CAS: 526-83-0
MF: C4H6O6
MW: 150.09
QAUV:
Qhov Ceev: 1.886 ± 0.06 g/cm3 (Kwv Yees)
Melting point: 159-171 ° C
cov lus qhia tshwj xeeb
| Khoom | Cov Lus Qhia Tshwj Xeeb
|
| Cov ntsiab lus ntawm DL-tartaric acid (xam rau ntawm qhov qhuav) / (%) yog siab | 99.5 |
| Qhov ntau ntawm qhov kub yaj / (℃) | 200-206 |
| Sulfate (xam li S0) / (%) | 0.04 |
| cov tshuaj yooj yim oxidizable | ua raws li |
| Poob thaum ziab/(%) | 0.5 |
| Cov seem ntawm kev sib txuas / (%) | 0.10 |
Kev Siv
Kev Taw Qhia: Vim tias cov molecule tartaric acid muaj ob lub atoms carbon asymmetric zoo sib xws, nws muaj peb lub isomers optical, uas yog dextrorotatory tartaric acid [L(+) -tartaric acid], levorotatory tartaric acid [D(-) -tartaric acid] thiab racemic tartaric acid (Meso). Cov L-tartaric acid thiab D-tartaric acid sib npaug zos sib xyaw kom tau racemic tartaric acid lossis DL-tartaric acid. L-tartaric acid thiab d-tartaric acid yog enantiomers. Txhua yam tartaric acid uas tshwm sim hauv ntuj yog dextrorotatory. Nws yog cov siv lead ua pob tshab tsis muaj xim lossis dawb zoo rau cov hmoov crystalline granular. Cov khoom crystalline muaj ib lub molecule ntawm dej crystalline, tsis muaj ntxhiab, ruaj khov hauv huab cua, muaj saj qaub, nrog rau qhov qaub ntawm 0.0025%, thiab qhov qaub ntawm citric acid yog kwv yees li 1.2 txog 1.3 npaug. Nws muaj qhov saj astringent me ntsis thiab muab cov ntxhiab tsw zoo ib yam li qab zib ci thaum hlawv. Nws kuj muaj cov teebmeem chelating rau cov hlau ions. 1g yog kwv yees li yaj hauv 0.8mL dej (ntawm 25 ℃), 0.5mL dej npau, thiab 3mL ethanol. Lub pH ntawm 0.3% aqueous kua yog 2.4.
tartaric acid yog ib hom carboxylic acid uas muaj nyob hauv ntau yam nroj tsuag, xws li txiv hmab thiab txiv ntoo tamarind, thiab kuj yog ib qho ntawm cov organic acids tseem ceeb hauv cawv. Tartaric acid, ua ib qho antioxidant ntxiv rau hauv cov khoom noj, tuaj yeem ua rau cov khoom noj muaj saj qaub. Tartaric acid zoo ib yam li citric acid thiab tuaj yeem siv rau hauv kev lag luam khoom noj, xws li hauv kev tsim cov dej haus. Tartaric acid, thaum siv ua ke nrog tannin, tuaj yeem ua haujlwm ua mordant rau cov xim acid. Tartaric acid tuaj yeem sib xyaw nrog ntau yam hlau ions thiab tuaj yeem siv ua tus neeg sawv cev ntxuav thiab tus neeg sawv cev polishing rau cov hlau nto.
Tartaric acid, tseem hu ua 2, 3-dihydroxysuccinic acid, dihydroxysuccinic acid, thiab gluconic acid, muaj peb lub isomers optical vim muaj ob lub carbon atoms asymmetric zoo sib xws hauv nws lub molecule. Tartaric acid suav nrog D-tartaric acid, L-tartaric acid, thiab DL-tartaric acid. Tartaric acid yog ib qho tsis muaj xim, pob tshab prismatic siv lead ua los yog hmoov nrog ib qho saj qaub heev thiab ib qho saj me ntsis. Nws yaj tau hauv dej thiab muaj ntau nyob rau hauv ntau yam nroj tsuag hauv xwm hauv daim ntawv ntawm potassium lossis calcium ntsev, nrog rau cov txiv hmab muaj cov ntsiab lus siab. Tartaric acid yog tsim los ntawm cov siv lead ua daj tso rau hauv qab ntawm cov thoob thaum lub sijhawm ua cawv txiv hmab, yog li ntawd lub npe tartaric acid. Nws qhov qaub yog li 1.3 npaug ntawm citric acid. Nws siv zoo ib yam li cov ntawm citric acid. Nws yaj tau hauv dej heev, yog li nws tsim nyog rau kev ua dej haus ua npuas dej. Cov kua qaub tartaric muaj ib lub molecule ntawm cov dej crystalline, tsis muaj ntxhiab, ruaj khov hauv huab cua, muaj saj qaub, nrog rau qhov qaub ntawm 0.0025%, thiab qhov qaub ntawm citric acid yog li 1.2 txog 1.3 npaug. Lawv muaj qhov saj astringent me ntsis thiab muab cov ntxhiab tsw zoo ib yam li qab zib ci thaum hlawv. Lawv kuj muaj cov teebmeem chelating rau cov hlau ions. 1g yog kwv yees li yaj hauv 0.8mL dej (ntawm 25 ℃), 0.5mL dej npau, thiab 3mL ntawm ethanol. Lub pH ntawm 0.3% aqueous kua yog 2.4. Dl-tartaric acid yog siv dav ua cov khoom noj khoom haus ntxiv, vitamin C effervescent ntsiav tshuaj, thiab tus neeg sawv cev ua ntsev acidifying (choline tartrate) rau cov tshuaj organic alkali, thiab lwm yam. Tartaric acid tuaj yeem tsim cov ntsev acid thiab cov ntsev nruab nrab nrog cov hauv paus. Piv txwv li, neutralize nws nrog potassium hydroxide los tsim potassium hydrogen tartrate. Cov tom kawg kuj tseem tuaj yeem ua tiav ntxiv rau hauv potassium antimony tartrate (piv txwv li, * tartrate) thiab sodium potassium tartrate. Nws kuj tseem siv tau los tsim cov ntsev xws li sodium hydrogen tartrate, sodium tartrate thiab ammonium tartrate. Raws li GB2760-86 ntawm peb lub tebchaws, tartaric acid tuaj yeem siv ua acidulant hauv cov khoom noj khoom haus ntxiv, thiab siv rau hauv cov dej haus txias, jams, dej haus, jelly, cov khoom noj hauv kaus poom thiab khoom qab zib. Vim nws qhov hygroscopicity qis thiab ruaj khov zoo, nws yog qhov tshwj xeeb tshaj yog rau cov kua txiv hmab txiv ntoo thiab cov dej haus khov. Nws kuj tseem siv ua cov khoom noj emulsifier thiab chelating tus neeg sawv cev, nrog rau cov antioxidant enhancer. Cov tshuaj ntxuav thiab polishes ntawm cov hlau; Cov ntaub ntawv raw tshuaj, mordants, thiab lwm yam. Nws feem ntau siv ua ke nrog citric acid, malic acid, thiab lwm yam. Qhov txwv hauv cov khoom noj qab zib yog 2% (Nyiv) thiab 4% (Tebchaws Meskas). Kev ceev faj rau kev siv: Cov khoom no muaj qhov saj qaub thiab me ntsis astringent. Nws feem ntau siv ua ke nrog lwm cov kua qaub. Feem ntau nws yog siv rau kev npaj cov dej haus thiab lwm yam khoom noj uas muaj saj txiv hmab. Qhov ntau thiab tsawg ntawm kev siv thiab qhov ntau npaum li cas: Nws tuaj yeem siv rau hauv ntau yam khoom noj hauv qhov ntau thiab tsawg raws li qhov xav tau rau kev tsim khoom. Kev siv tswv yim: Thaum siv rau jams thiab jellies, nws raug nquahu kom tswj cov pH ntawm cov khoom ntawm 2.8 txog 3.5. Nws feem ntau yog siv ua ke nrog citric acid, malic acid, thiab lwm yam. Cov khoom no kuj tseem tuaj yeem siv rau hauv qhov ntau thiab tsawg hauv cov khoom qab zib thiab cov khoom ci, thiab lwm yam.
Ntim thiab Xa Khoom
25KG / Nruas los yog raws li cov neeg siv khoom xav tau.
Yog cov khoom siv dav dav thiab tuaj yeem xa los ntawm dej hiav txwv thiab huab cua
Khaws cia thiab khaws cia
Lub neej txee: 24 lub hlis txij li hnub tsim khoom hauv cov ntim khoom tsis tau qhib khaws cia rau hauv qhov chaw txias thiab qhuav kom tsis txhob raug tshav ntuj ncaj qha, dej.
Lub tsev rau khoom muaj cua nkag, ziab kom qhuav kub tsawg, Sib cais ntawm cov tshuaj oxidants, cov kua qaub.
