商品名:L-胱氨酸
别 名:L-膀胱氨基酸,双硫代氨基丙酸
L(-)-3,3'-Dithiobis(2-aminopropanoic acid)
2-Amino-3-[(2-amino-2-carboxyethyl)dithio]propanoic acid
(R,R)-3,3'-Dithiobis(2-aminopropionicacid)
英文名:L-Cystine
产 地:湖南
Cas号:56-89-3
MDL:MFCD00064228
Beilstein:1728094
EINECS:200-296-3
分子结构:
分子式:C6H12N2O4S2
分子量:240.3000
备注:以上描述,仅作参考,并不表示您收到的产品,与此项描述完全相符,产品的出厂标准,请参见质量标准。
性状:白色片状结晶,溶于酸和碱性溶液,不溶于乙醇、乙醚、苯和三氯甲烷。溶解度:0.112g/L水(25°C), 24mg/100mL水(50°C)、52 mg/100mL 水 (75°C)、114 mg/100mL 水(100°C)。熔点: >240℃(dec.) [a]20/D: -224° (c=2;1 M 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 重金属Heavy metals (as Pb) 硫酸盐灰分Sulfated ash 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 品级Grade 非动物源,达到EP标准,用于细胞培养 (≥99%, from non-animal source, for cell culture) 外观Appearance 白色结晶粉末 红外光谱鉴别Infrared spectrometry Conforms 水溶性solubility clear colorless solution at 1g to 10ml of 2m hydrochloric acid 残留溶剂residual solvents meets the requirements 干燥损失Loss on Drying ≤0.50 % 灼烧残渣Residue on ignition (Ash) ≤0.10 % 内毒素Endotoxin Level ≤1 EU/mg 细胞培养测试Cell Culture Test Pass 比旋光度Specific rotation [a]20/D -218 to -224°(c = 2 in 1m hydrochloric acid) 氯Chloride ≤0.02 % 硫酸根Sulfate ≤0.03 % 铁Iron ≤10.0 ppm 重金属Heavy metals ≤10.0 ppm 铵Ammonium ≤200.0 ppm 砷Arsenic ≤1 ppm 茚三酮阳性物质Ninhydrin positive substances (each) conforms 含量Assay(dry basis) 98.5 to 101.0% 水溶解试验Solubility in water at 20 °C 280 g/l pH 4.5 - 6 来源Origin must be non-animal source
存储:密封阴凉干燥避光保存。
用途:某些肿瘤细胞系需要胱氨酸或在培养基中半胱氨酸;各种微生物的生长必须物质
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