4Arm-PEG-NHS, 4Arm-PEG-SCM four arm (polyethylene glycol) NHS Synonym: four arm  PEG NHS Product Structure: Product Specifications: l  Catalog Numbers:PS4-H-2K,5K,10K.20K. l  Appearance: White/off-white or pale-yellow solid, semi-solid or liquid depends on molecular weight. l  Solubility: 10 mg/mL in water,chloroform, DMSO. l  Stability: 1Years at -20°C, Desiccate. l  Molecular Weight（PEG）:2K,5K,10K.20K. l  Reactive group:NHS l  Purity: > 95%. Handling and Use: 4Arm-PEG-NHS  is sensitive to light and temperature. For best use, material should always be kept in low temperature in dry condition.  Avoid frequent thaw and freezing. For more information about using this product, . Storage Conditions： 4Arm-PEG-NHS should be stored at -20℃. Desiccate.  Materials may be handled under inert gas for best stability. Re-test material after 12 months. Related Products: 4arm-PEG-DA,4arm-PEG-MAL 4arm-PEG-SH,4arm-PEG-NHS 4arm-PEG-N3,4arm-PEG-ACA       This product is for research use only and is not intended for use in humans or for diagnostic use.