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Product details
Catalog number 135000-44-35.500MG
Price for 135000-44-35.500MG
Size / count 500 mg
Orthopyridyl disulfide (OPSS) PEGs are thiol-specific PEGylation reagents that react with free sulfhydryls (-SH) at a wide pH range (pH 3-10) through disulfide exchange. The newly formed disulfide (S-S) bond is unstable in a reducing environment. Thus, the bond can be cleaved to reverse the pegylation and release free thiols. PEG-NHS ester derivatives are active esters and useful reagents to pegylate proteines, peptides or any other surfaces with a free primary amino group to form stable amide bonds. The Reaction requires a neutral to alkaline pH (7 to 8.5) to proceed. However, hydrolysis competes with aminolysis of the active ester and also increases with higher pH. Thus, working with excess PEG-NHS ester is necessary to obtain high pegylation yields. The PEG butyric acid NHS ester derivative has a C4 chain directly attached to PEG. It is one of the most stable PEG NHS esters known with a hydrolysis half-life of over 20 min at pH 8.
The catalog number for Ɑ-Butyric Acid NHS Ester-ω-Pyridyldithiopropanamido PEG is 135000-44-35.500MG.
Ɑ-Butyric Acid NHS Ester-ω-Pyridyldithiopropanamido PEG is available in the following size(s): 500 mg.
Ɑ-Butyric Acid NHS Ester-ω-Pyridyldithiopropanamido PEG is currently made to order / not held in immediate stock. Contact us for lead time.
Orthopyridyl disulfide (OPSS) PEGs are thiol-specific PEGylation reagents that react with free sulfhydryls (-SH) at a wide pH range (pH 3-10) through disulfide exchange. The newly formed disulfide (S-S) bond is unstable in a reducing environment. Thus, the bond can be cleaved to reverse the pegylati
We don’t generally offer free samples, but trial discounts in exchange for feedback and validation results are almost always possible. Contact us with your intended application to arrange one.
Yes. Ordering two or more units, or combining this with other products, usually qualifies for a discount depending on quantity. Contact our sales team with your required volume for a custom quote.
A Certificate of Analysis is available for most products upon request. Contact our support team with the lot number to obtain the relevant CoA.
