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商品编号:52639
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Ampicillin sodium salt BioChemica(氨苄青霉素钠盐)

价    格:询价

产    地:德国更新时间:2019/7/15 13:41:34

品    牌:AppliChem型    号:A0839

状    态:正常点击量:1626

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北京西美杰科技有限公司

联 系 人:方丽初

电     话:010-88597838

传     真:010-88595011

等     级: (第 12年)

性     质:生产型,贸易型,服务型,

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Ampicillin sodium salt BioChemica

A0839

Order No. Quantity
A0839,0010 10 g
A0839,0025 25 g
A0839,0100 100 g


产品参数

Synonym D(-)-α-Aminobenzylpenicillin sodium salt 
Melting point 212 - 215°C (dec.) 
Formula C16H18N3NaO4
M 371.39 g/mol 
CAS-No. 69-52-3 
HS-No. 29411000 
EC-No. 200-708-1 
Storage RT 
LGK 10 - 13 
Specification  
Assay (titr.) min. 98 % 
α20°C/D; 0.2 %, H2O +258° - +287° 
pH (10 %; H2O; 20°C) 8.0 - 10.0 
Heavy metals max. 0.002 % 
Water (K.F.) max. 2 % 


产品介绍

(1)  Nguyen-Distèche, M. et al. (1974) Eur. J. Biochem. 41, 457-463
Sensitivity to Ampicillin and Cephalothin of enzymes involved in wall peptide crosslinking in E. coli K12, strain 44.

Hinweis

Ampicillin is a half-synthetic penicillin (β-lactam antibiotic), known to interfere with the wall peptide crosslinking in growing bacteria. It inhibits the enzyme activity of transpeptidase, carboxypeptidase and endopeptidase. Its action is bactericidal and the pH optimum for its action ranges from pH 5.5 - 6. At this pH value, its activity against E. coli is 10x higher in comparison to pH 8.
Ampicillin sodium salt is readily watersoluble and stock solutions are prepared at concentrations of 50 mg/ml, stored at -20°C in aliquots. The working concentration in LB-ampicillin plates, LB or TB medium is 50 μg/ml (dilution 1 : 1000).
Stability: The activity of a 10 % aqueous solution of ampicillin, if stored at +4°C (pH 7), is reduced by 15 % after 24 hours, 33 % after 48 hours and 65 % after 7 days. At room temperature, the corresponding loss of activity is 28 %, 45 % and 81 %, respectively.



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