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中文名(CN) 英文名(EN) CAS No. 规格(SP) 报价(CNY) 产地(From) 类别(Key)
L-胱氨酸 L-Cystine (cell culture tested, ≥98.5%) 56-89-3 25G 280.00 Sigma-C7602 氨基酸
L-胱氨酸 L-Cystine (cell culture tested, ≥98.5%) 56-89-3 100G 950.00 Sigma-C7602 氨基酸
L-胱氨酸 L-Cystine (cell culture tested, ≥98.5%) 56-89-3 500G 3500.00 Sigma-C7602 氨基酸

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数据参数(Specifications)

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中文名称 3,3’-二硫代二丙氨酸;L-3,3’-二硫代双(2-氨基丙酸);L-膀胱氨基酸;L-胱胺酸;胱氨酸;双-β-硫化丙氨酸;双半胱氨酸;双巯丙氨酸
英文名称 3,3’-dithiobis(2-aminopropanoicacid);3,3’-dithiobis-l-alanin;3,3'-Dithiobis(2-aminopropanoic acid)
CAS识别号 56-89-3
MDL识别号 MFCD00064228
EC识别号 200-296-3
Beilstein 1728094
分子式 [-SCH2CH(NH2)CO2H]2
分子量 240.30
分子结构图 分子图
产品性状 白色片状结晶或结晶性粉末;极微溶于水;不溶于乙醇及其他有机溶剂,易溶于稀酸和碱性液中,在热碱液中易分解;pI4.6;分解点为260-261℃;比旋光度[α]20D-223.4°(0.5-2.0mg/ml,5mol/L HCl).
质量标准 99%:
外观Appearance                                                     白色结晶粉末
红外光谱鉴别Infrared spectrometry                       和对照品匹配
纯度Purity                                                               ≥99.0% (T)
干燥损失Loss on drying                                         <0.5 % (105°C, 3 小时)
重金属Heavy metals (as Pb)                                   <10 ppm
硫酸盐灰分Sulfated ash                                         <0.1 %
比旋光度Specific rotation [a]20/D                          -211° ~ -224° (c=2, 1 M HCl)
Fe                                                                           < 10 ppm
Cl                                                                            < 100 ppm
NH4                                                                        < 100 ppm
SO4                                                                        < 100 ppm

99.5%:
含量assay                                                               ≥99.5% (T)
比旋光度Specific rotation [a]20/D                          -214° ~ -224° (c=2, 1 M HCl)  
不溶物insoluble matter,                                           passes filter test
其它氨基酸foreign amino acids                              ≤0.3%
灼烧残渣ign. residue                                              ≤0.05% (as SO4)
干燥损失loss on drying, 20 °C (HV)                      ≤0.05%
盐酸溶解试验solubility in 1 M HCl                        soluble 0.2 M at 20 °C, clear, colorless
氯chloride (Cl-):                                                       ≤500 ppm
硫酸根sulfate (SO42-):                                            ≤100 ppm
痕量阳离子cation traces by ICP Atomic emission
  Al:                                                                           ≤5 ppm
  As:                                                                          ≤0.1 ppm
  Ba:                                                                          ≤5 ppm
  Bi:                                                                           ≤5 ppm
  Ca:                                                                          ≤10 ppm
  Cd:                                                                          ≤5 ppm
  Co:                                                                          ≤5 ppm
  Cr:                                                                           ≤5 ppm
  Cu:                                                                          ≤5 ppm
  Fe:                                                                           ≤10 ppm
  K:                                                                            ≤50 ppm
  Li:                                                                            ≤5 ppm
  Mg:                                                                          ≤5 ppm
  Mn:                                                                          ≤5 ppm
  Mo:                                                                          ≤5 ppm
  Na:                                                                           ≤50 ppm
  Ni:                                                                            ≤5 ppm  
  Pb:                                                                           ≤5 ppm  
  Sr:                                                                            ≤5 ppm  
  Zn:                                                                            ≤5 ppm  
abs.  absorption0.2M/316 nm, 1 M HCl cut-off

用于生化研究,生物培养基的制备,医药上用于肝炎、放射性损伤的防治、各种秃发症、及药物中毒,也可用于急性传染病、支气管哮喘、神经痛及湿疹和烧伤的辅助治疗。用于医药、食品、化妆品等行业用于医药、化妆品、食品添加剂等营养增补剂、调味剂。用于奶粉的母乳化。面团筋力增强剂,用于焙烤食品(酵母发酵剂)、发酵粉。
储存条件 常温密封避光保存,Stored in cool, dry and airproof.
包装说明 Bellancom原装进口,正品保证,Bellancom Chemistry The original.
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