?? L-???? ?????
|
|
?? L-???? ????? ??
- ???
- 175°C
- ??
- +6.0～+7.5゜ (20℃/D)(c=8,6mol/l HCl)(calculated on the dried basis)
- ??
- 1.54 g/cm3
- ???
- <0.1 hPa (20 °C)
- ???
- 6 ° (C=8, 1mol/L HCl)
- ?? ??
- Keep in dark place,Inert atmosphere,Room temperature
- ???
- H2O: 1 M at 20 °C, ??, ??
- ??? ??
- ??
- ??? ??
- ??? ??
- ??
- ???
- ??????(pH)
- 0.8-1.2 (100g/l, H2O, 20℃)
- pH ??
- 1 - 2
- optical activity
- [α]20/D +5.6±0.3°, c = 5% in 5 M HCl
- ???
- ??? ?????.
- ??
- Hygroscopic
- ?? ??(λmax)
- λ: 260 nm Amax: 1.0
λ: 280 nm Amax: 0.3
- Merck
- 14,2781
- BRN
- 5158059
- ???
- ????. ?? ???, ???? ???? ??, ????? ???? ????.
- LogP
- 0.235 (est)
- CAS ??????
- 7048-04-6(CAS DataBase Reference)
- ?? ? ?? ??
- ?? ? ???? ?? (GHS)
| ??? ?? | Xi | ||
|---|---|---|---|
| ?? ???? ?? | 36/37/38 | ||
| ????? | 26-36 | ||
| WGK ?? | 3 | ||
| RTECS ?? | HA2285000 | ||
| F ?????? | 3-10-23 | ||
| TSCA | Yes | ||
| HS ?? | 29309013 | ||
| ???? ?? | KE-01430 |
| ????(GHS): |
|
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ?? ?: | Warning | ||||||||||||||
| ??·?? ??: |
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| ??????: |
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?? L-???? ????? C??? ??, ??, ??
????
? (1) ?? : ? ?? 1g? ? 20mL? ?? ?, ? ?? ????? ??? ?? ?? ????? ??.
??(2) ???? : ? ?? 4g? ??? ?? 1N ??? ?? 50mL? ?? ? ?? ???? ??? ?, 
＝+5.0～+8.0°??? ??.
??(3) ?? : ? ??? ?????? ?? ??? ?, ? ?? 2.0ppm ????? ??.
??(4) ? : ? ?? 5.0g? ??? ??????? ?? ?????????????? ?? ??? ?, ? ?? 5.0ppm ????? ??.
??(5) ??? : ? ?? 100mg? ?????????(1→50) 50mL? ??? ??? 2?? ??? ?? 5μL? ?????? ?? n-?????????? ??(5 : 1 : 2)? ?????? ?? ????????? ?1??? ??? ?, ??? ?? ??? ??? ???? ?? ??. ?? ??? ???????? 2?? ????. ?????? ? 30cm ???? ??? ??? ???? 100℃?? 20?? ??? ?? ??????? n-?????(1→500)? ???? 100℃?? 5?? ??? ?? ???? ??? ????. ???? ?? ?? ????.
????
? (1) ? ??? ???(1→1,000) 5mL? ??? 0.5mL? ??????(1→100) 1mL? ??? 5?? ???? ?～???? ????.
??(2) ? ??? ???(1→1,000) 10mL? ???????? 2mL? ???????????? 2??? ?? ?, ???? ????.
??(3) ? ??? ???(1→50) 10mL? ????? 1mL? ??? ?? ??? 10?? ??? ?? ????? ? ??? (?)? ??? ????.
???
? ? ??? ??? ?? ? 0.25g? ??? ?? ? 20mL? ????? 4g? ??? ???. ???? 5mL? 0.1N????? 25mL? ??? ??? ??? 20?? ??? ??? ? ??? ???? 0.1N ??????????? ????(??? : ????). ?? ???? ???? ??.
0.1N ????? 1mL ＝ 15.76mg C3H7NO2S?HCl
?????
? ? ?? 1g? ??? ?? ?????? ??? ????????? ?? ??? ?, ? ?? 0.1% ????? ??.
??? ??
white crystalline powder
??
L-Cysteine hydrochloride monohydrate is used as a precursor in food, pharmaceutical and personal care products. It is actively involved in the production of flavors such as meat flavor obtained by reacting with sugars. It plays an important role as a key raw material for the manufacture of N-acetyl-L-cysteine, S-carboxymethyl-L-cysteine and L-cysteine base. It is involved in the treatment of liver disease as an antioxidant and antidote. Being an essential amino acid, it used as animal feed especially for sheep, which is responsible the growth of wool.??
ChEBI: A hydrate that is the monohydrate form of L-cysteine hydrochloride.?? ??
This product is supplied from Wacker FERMOPURE? material, but is sold for R&D use only, not for drug, household or other uses.Purification Methods
Likely impurities are cystine and tyrosine. Crystallise the salt from MeOH by adding diethyl ether, or from hot 20% HCl. Dry it under vacuum over P2O5. Hygroscopic. [Beilstein 4 III 1580, 1600.]?? L-???? ????? ?? ?? ? ???
???
?? ??
?? L-???? ????? ?? ??
| ??? | ?? | ??? | ?? | ?? ? | ?? |
|---|---|---|---|---|---|
| DONBOO AMINO ACID COMPANY | +8613063595538 |
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| Hefei TNJ Chemical Industry Co.,Ltd. | +86-0551-65418684 +8618949823763 |
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| HUARONG(GUANGDONG) PHARMACEUTICAL CO.,LTD | +86-19925801629 +86-19925801629 |
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| Hebei Weibang Biotechnology Co., Ltd | +8615531157085 |
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| Hebei Chuanghai Biotechnology Co,.LTD | +86-13131129325 |
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| Sichuan HongRi Pharma-Tech Co.,Ltd | +86-028-64841719 +8617390183901 |
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| Shandong Juchuang Chemical Co., LTD | +undefined15030412209 |
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| airuikechemical co., ltd. | +undefined86-15315557071 |
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