L-Cysteine 99% |52-90-4 ib
Product Description:
L-cysteine, ib qho amino acid feem ntau pom hauv cov kab mob muaj sia.Nws yog ib qho ntawm cov sulfur-muaj α-amino acids.Nws hloov ntshav (xim vim SH) nyob rau hauv lub xub ntiag ntawm nitroprusside.Nws muaj nyob rau hauv ntau cov proteins thiab glutathione.Nws tuaj yeem tsim cov tshuaj tsis sib haum nrog cov hlau ions xws li Ag +, Hg +, thiab Cu +.mercaptide.Ntawd yog, RS-M ', RSM "-SR (M', M" yog cov hlau monovalent thiab divalent hlau, feem).
Molecular formula C3H7NO2S, molecular hnyav 121.16.Cov xim tsis muaj kob.Soluble nyob rau hauv dej, acetic acid thiab ammonia, insoluble nyob rau hauv ether, acetone, ethyl acetate, benzene, carbon disulfide thiab carbon tetrachloride.Nws tuaj yeem oxidized rau cystine los ntawm huab cua hauv nruab nrab thiab tsis muaj zog alkaline daws.
Kev ua tau zoo ntawm L-Cysteine 99%:
1. Feem ntau yog siv hauv tshuaj, tshuaj pleev ib ce, kev tshawb fawb biochemical, thiab lwm yam.
2. Nws yog siv rau hauv khob cij los txhawb kev tsim gluten, txhawb kev fermentation, pwm tso tawm, thiab tiv thaiv kev laus.
3. Siv hauv cov kua txiv hmab txiv ntoo los tiv thaiv oxidation ntawm vitamin C thiab tiv thaiv cov kua txiv hmab txiv ntoo los ntawm browning.Cov khoom no muaj cov nyhuv detoxification thiab tuaj yeem siv rau acrylonitrile lom thiab aromatic acid lom.
4. Cov khoom no kuj muaj cov txiaj ntsig ntawm kev tiv thaiv hluav taws xob puas tsuaj rau tib neeg lub cev, thiab tseem yog ib qho tshuaj rau kev kho mob bronchitis, tshwj xeeb tshaj yog cov phlegm-relieving tshuaj (feem ntau yog siv nyob rau hauv daim ntawv ntawm acetyl L-cysteine methyl ester. Cosmetics. yog siv rau kev zoo nkauj Dej, perm lotion, tshuaj pleev thaiv hnub, thiab lwm yam.
Kev ntsuas ntawm L-Cysteine 99%:
| Cov khoom tsom xam | Specification |
| Qhov tshwm sim | Dawb crystals hmoov los yog crystalline hmoov |
| Kev txheeb xyuas | Infrared nqus spectrum |
| Kev sib hloov tshwj xeeb[a]D20° | +8.3° ~ + 9.5° |
| Txoj kev daws teeb meem | ≥95.0% |
| Ammonium (NH4) | ≤ 0.02% |
| Chloride (Cl) | ≤0.1% |
| Sulfate (SO4) | ≤ 0.030% |
| Hlau (Fe) | ≤10ppm |
| Cov hlau hnyav (Pb) | ≤10ppm |
| Arsenic | ≤1ppm |
| Poob rau ziab | ≤ 0.5% |
| Residue ntawm ignition | ≤0.1% |
| Assay | 98.0 ~ 101.0% |
| PH | 4.5 ~ 5.5 hli |
