Penicillin G sodium salt CAS:367-93-1 White powder 99%
| Catalog Number | XD90350 |
| Product Name | Penicillin G sodium salt |
| CAS | 69-57-8 |
| Molecular Formula | C16H17N2NaSO4 |
| Molecular Weight | 356.37 |
| Storage Details | 2 to 8 °C |
| Harmonized Tariff Code | 29411000 |
Product Specification
| pH | 5.0-7.5 |
| Assay | 99% |
| Appearance | White powder |
| Loss on Drying | <1.0% |
| Colour | <1 |
| Specific optical rotation | +285° - +310° |
| Clarity | <1 |
| Potency | >1600u/mg |
| Total Impurities | <1.0% |
| Bacterial endotoxins | <0.10IU/mg |
| Polymer of penicillin | <0.08% |
| Insoluble Particles | >10um:<6000, >25um:<600 |
| Sterile | Conforms |
| Absorbance 280nm | <0.1% |
| Visible Foreign Matter | <5/2.4g |
| Absorbance 264nm | 0.8-0.88% |
| Absorbance 325nm | <0.1% |
This product is an inducer of β-galactosidase and β-galactosidase, not hydrolyzed by β-galactoside, and is a substrate for thiogalactosidase. IPTG is commonly used in cloning experiments that require induction of β-galactosidase activity. It is often used in combination with X-Gal or Bluo-Gal for blue-white screening of recombinant bacterial colonies that can be Chemicalbook to induce expression of the lac operon in E. coli. IPTG binds to the lacI repressor protein and changes its conformation to prevent the inhibition of the β-galactosidase-encoding gene lacZ.
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