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Compound Search guide
 PEG dicarboxylic acid with molecular weight distribution. 

COOH-PEGn-COOH derived from commercially available OH-PEGn-OH with molecular weight distribution.

We do not compromise on quality even with low-cost non-monodisperse PEG derivatives with molecular weight distribution.

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We apply proprietary methods to remove impurities such as unreacted raw materials (OH-OH), one-sided reaction intermediates (R-OH), and other impurities contaminated in raw materials.

If the carboxylic acid is protected at both ends, the retention time changes significantly as follows.
After deprotection, the chromatogram changes to the following. The retention time is exactly the same as that of the raw material PEG1.4K, but since it has been isolated once as the protected precursor, there is no room for the OH-OH or the half-reaction by- product OH-COOH to be mixed in.

A single structure gives a chromatogram like the one below, with a sharper HPLC shape and much simpler MS spectra.

Also available for active esters (NHS)

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Click on the SCHEM No. in the list to display a detailed page.


SCHEM No. Structure Compound Name Price (JPY) Purity Stock(mg)
05993

COOH-PEG20K-COOH

77,600/0.8mg<80%27.1
05992

PrCOOH-PEG20K-OPrCOOH

80,500/5mg<80%0
00660

COOH-PEG2K-COOH

87,200/25mg<80%1,550.3
03109

PrCOOH-PEG2K-OPrCOOH

85,000/250mg<80%206.8
00715

COOH-PEG1.4K-COOH

77,300/25mg<80%2.8
03115

PrCOOH-PEG1.4K-OPrCOOH

84,200/25mg<80%0
03071

PrCOOH-PEG1.4K-OPrCOOH

81,900/250mg<80%0
05991

PrCOOH-PEG1K-OPrCOOH

81,700/500mg<80%0
03431

COOH-PEG1K-COOH

77,300/50mg<80%330.5

Other structures, not listed here, with different average molecular weights or other functional groups are also available.

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