L-半胱氨酸盐酸盐,一水合物

L-Cysteine hydrochloride hydrate 是一种条件必需氨基酸,是硫化氢 (H2S)、谷胱甘肽和牛磺酸等生物活性分子的前体。L-Cysteine hydrochloride hydrate 能抑制胃饥饿素,降低啮齿动物和人类的食欲。

[ 描述 ]:

[ 相关类别 ]:

[参考文献]

[ 沸点 ]:
293.9ºC at 760 mmHg

[ 熔点 ]:
175°C

[ 分子式 ]:
C₃H₁₀ClNO₃S

[ 分子量 ]:
175.634

[ 闪点 ]:
131.5ºC

[ 精确质量 ]:
175.006989

[ PSA ]:
111.35000

[ LogP ]:
0.76610

[ 外观性状 ]:
白色结晶粉末

[ 折射率 ]:
6 ° (C=8, 1mol/L HCl)

[ 储存条件 ]:
Store at RT.

[ 稳定性 ]:
Stable. Incompatible with strong oxidizing agents, most common metals, hydrogen chloride.

[ 水溶解性 ]:
H2O: 1 M at 20 °C, clear, colorless

详细MSDS(安全技术说明书)

CHEMICAL IDENTIFICATION

RTECS NUMBER :

HA2285000

CHEMICAL NAME :

L-Cysteine, hydrochloride, monohydrate

CAS REGISTRY NUMBER :

7048-04-6

LAST UPDATED :

199504

DATA ITEMS CITED :

2

MOLECULAR FORMULA :

C3-H7-N-O2-S.Cl-H.H2-O

MOLECULAR WEIGHT :

175.65

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Subcutaneous

SPECIES OBSERVED :

Rodent - mouse

DOSE/DURATION :

3564 mg/kg

TOXIC EFFECTS :

Details of toxic effects not reported other than lethal dose value

REFERENCE :

JJANAX Japanese Journal of Antibiotics. (Japan Antibiotics Research Assoc., 2-20-8 Kamiosaki, Shinagawa-ku, Tokyo 141, Japan) V.21- 1968- Volume(issue)/page/year: 41,105,1988 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X9440 No. of Facilities: 196 (estimated) No. of Industries: 2 No. of Occupations: 6 No. of Employees: 1414 (estimated) No. of Female Employees: 879 (estimated)

[ 个人防护装备 ]:
dust mask type N95 (US);Eyeshields;Gloves

[ 危害码 (欧洲) ]:
Xi:Irritant

[ 风险声明 (欧洲) ]:
R36/37/38

[ 安全声明 (欧洲) ]:
S26-S36

[ 危险品运输编码 ]:
NONH for all modes of transport

[ WGK德国 ]:
3

[ RTECS号 ]:
HA2285000

[ 海关编码 ]:
29309013

L-半胱氨酸盐酸盐,一水合物上游产品

L-半胱氨酸盐酸盐,一水合物下游产品

用盐酸加热水解头发6～8h，减压蒸出盐酸，用活性炭脱色、过滤，滤液用氨水中和后得L-胱氨酸粗结晶，然后用氨水重结晶得L-胱氨酸。再以L-胱氨酸为原料，经还原可得L-半胱氨酸，其方法有二。
锡粒还原法。
将L-胱氨酸溶解于稀盐酸，加入锡粒并升温回流还原反应2h，滤去还原液中剩余的锡粒，并用水稀释，然后通人硫化氢使其饱和；过滤，滤渣用少量水洗；合并洗液和滤液，经减压浓缩、冷却结晶、分离、干燥得L-半胱氨酸盐酸盐。
HOOCCH(NH2)CH2SSCH2CH(NH2)COOH+Sn[HCl,H2S→HSCH2CH（NH2）COOH·CHl
电解还原法
将L-胱氨酸和稀盐酸加入电解槽，搅拌溶解，并在50℃下电解；电解液通硫化氢数小时使之饱和；过滤，滤液加活性炭脱色，脱色液经减压浓缩、冷却结晶、分离、干燥得L-半胱氨酸盐酸盐，每吨产品消耗胱氨酸0.7t，盐酸1t。

[ 海关编码 ]: 2930909090

[ 中文概述 ]:
2930909090. 其他有机硫化合物. 增值税率:17.0%. 退税率:13.0%. 监管条件:无. 最惠国关税:6.5%. 普通关税:30.0%

[ 申报要素 ]: 品名, 成分含量, 用途

[ Summary ]:
2930909090. other organo-sulphur compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

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￥需询单/1kg ￥需询单/1ton

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￥120.0/25kg

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