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N-Ethylmaleimide

Cas:
128-53-0
Molecular Structure:
MDL:
MFCD00005509
Molecular Formula:
C6H7NO2
Molecular Weight:
125.12
Alias:
N-乙基马来酰亚胺,N-乙基马来酰亚胺, N-乙基顺丁烯二酰亚胺NEM
Product order:
Name Specifications Packing Price Delivery
N-Ethylmaleimide 98% 1g RMB 107.8 Consulting service
N-Ethylmaleimide 98% 5g RMB 299.2 Consulting service
N-Ethylmaleimide 98% 25g RMB 935 Consulting service
N-Ethylmaleimide 超纯级,99.0% 1g RMB 209 Consulting service
N-Ethylmaleimide 超纯级,99.0% 5g RMB 649 Consulting service
N-Ethylmaleimide 超纯级,99.0% 25g RMB 2189 Consulting service
Character:
易溶于醇及醚,微溶于水。有刺激性,催泪。
熔点:46℃
沸点: 210℃
   溶解度:50 mg/ml乙醇,>50 mg /4 ml水,1115 g/l 甲苯(20°C)。;然而,水溶液不稳定。水解速率准一级,并且显著依赖于pH值。 
Quality Standard:
99%:
外观Appearance                          白色至淡黄色结晶粉末
红外光谱鉴别Infrared spectrometry       符合
纯度Purity                              ≥99.0% (HPLC)
熔点Melting point                       42°C - 47°C
水溶解试验Solubility in Water           溶液透明


超纯级,99.5%:

外观Appearance                          白色粉末
红外光谱鉴别Infrared spectrometry       符合
纯度Purity                              ≥99.5% (HPLC)
不溶物insoluble matter,                 passes filter test
灼烧残渣ign. residue                    ≤0.05%
熔点Melting point                       43°C - 48°C
水溶性solubility methanol:              soluble1 M at 20 °C, clear, colorless
anion traces by ICP Atomic emission
氯chloride (Cl-):                       ≤50 ppm
硫酸根sulfate (SO42-):                  ≤100 ppm
cation traces by by ICP Atomic emission
  Al:                                   ≤5 ppm            
  Ba:                                   ≤5 ppm
  Bi:                                   ≤5 ppm
  Ca:                                   ≤10 ppm
  Cd:                                   ≤5 ppm
  Co:                                   ≤5 ppm
  Cr:                                   ≤5 ppm
  Cu:                                   ≤5 ppm
  Fe:                                   ≤5 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.                                   absorption1M/382 nm, methanol cut-off 

Storage:
储存温度: 2-8°C
1、蛋白质半胱氨酸残基的共价修饰试剂。
2、巯基烷化试剂,使依赖于NADP的异柠檬酸脱氢酶和许多的内切酶失活。
3、在交感神经元中增加来自于M-通道的电流,并作为KCNQ2, KCNQ4 和 KCNQ5通道的开放者(opener)行施作用。
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