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L-Cystine

Cas:
56-89-3
Molecular Structure:
MDL:
MFCD00064228
Molecular Formula:
C6H12N2O4S2
Molecular Weight:
240.30
Alias:
L-膀胱氨基酸,雙硫代氨基丙酸 L(-)-3,3'-Dithiobis(2-aminopropanoic acid) 2-Amino-3-[(2-amino-2-carboxyethyl)dithio]propanoic acid (R,R)-3,3'-Dithiobis(2-aminopropionicacid)
Product order:
Name Specifications Packing Price Delivery
L-Cystine 超純級,99.5% 500g RMB 3245 Consulting service
L-Cystine 超純級,99.5% 100g RMB 748 Consulting service
L-Cystine 超純級,99.5% 25g RMB 209 Consulting service
L-Cystine 99% 500g RMB 506 Consulting service
L-Cystine 99% 100g RMB 110 Consulting service
L-Cystine 99% 25g RMB 66 Consulting service
Character:
白色片狀結(jié)晶,溶于酸和堿性溶液,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)。
熔點:  >240℃(dec.)  
[a]20/D:  -224° (c=2;1 M HCL)
Quality Standard:
99%:

外觀Appearance                          白色結(jié)晶粉末
紅外光譜鑒別Infrared spectrometry       和對照品匹配
純度Purity                              ≥99.0% (T)
干燥損失Loss on drying                  <0.5 % (105°C, 3 小時)
重金屬Heavy metals (as Pb)              <10 ppm
硫酸鹽灰分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%
灼燒殘渣ign. residue                     ≤0.05% (as SO4)
干燥損失loss on drying, 20 °C (HV)      ≤0.05%
鹽酸溶解試驗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
痕量陽離子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

Storage:
密封陰涼干燥避光保存。
用途  某些腫瘤細胞系需要胱氨酸或在培養(yǎng)基中半胱氨酸;各種微生物的生長必須物質(zhì)
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