PurePEG, LLC is a leading supplier of high-quality, monodisperse polyethylene glycol (PEG) and related products for academic and commercial applications. The company offers PEG materials with defined repeat units, a wide range of terminal functional groups (X and Y), and diverse architectures including linear, branched, and multi-arm structures. Leveraging its proprietary PurePEG technology developed through years of innovation, PurePEG is able to produce highly pure PEGs with precise molecular weights and narrow dispersity. The company has pioneered PEG derivatives for antibody–drug conjugates (ADCs), including acid-functionalized PEG used in targeted cancer therapies. Due to its excellent water solubility, low toxicity, and non-immunogenicity, PEG has become an essential material in biomedicine, with multiple PEGylated drugs approved for clinical use. In addition to its catalog products, PurePEG provides high-quality custom synthesis and contract development services ranging from milligram to kilogram scale.
Vicbio Biotechnology Co., Ltd. provides the full range of PurePEG products.
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PurePEG offers high-quality monodisperse polyethylene glycol with precisely defined molecular weights and structures. These PEG products are designed to ensure consistency and reproducibility in advanced research and pharmaceutical applications.
A wide range of PEG derivatives with diverse terminal functional groups (X and Y) is available to support PEGylation, bioconjugation, and targeted drug delivery applications.
PurePEG provides PEG materials with various structural formats, including linear, branched, and multi-arm configurations, enabling flexible design for drug delivery systems and biomaterial development.
PurePEG develops specialized PEG derivatives for antibody–drug conjugates (ADCs), including acid-functionalized PEGs designed to support targeted therapeutic development.
PurePEG offers custom synthesis and contract development services for PEG products across a wide scale range, from milligram to kilogram quantities, tailored to specific research and industrial requirements.
| Product Name | Cat# | CAS | Molecular formula | Molecular weight |
| 3,3′-Diselenobispropionic acid | 512371 | 7370-58-3 | C6H10O4Se2 | 304.06 |
| di-tert-butyl 3,3′-diselanediyldipropionate | 512282 | N/A | C14H26O4Se2 | 416.3 |
| 2,2′-diselanediyldiacetic acid | 512361 | 16066-50-5 | C4H6O4Se2 | 276.01 |
| di-tert-butyl 2,2′-diselanediyldiacetate | 512281 | N/A | C12H22O4Se2 | 389.98 |
| Azido-PEG4-Val-Ala-PAB-PNP | 5126604 | N/A | C33H45N7O12 | 731.8 |
| Azido-PEG4-Val-Ala-PAB | 5116604 | N/A | C26H42N6O8 | 566.7 |
| Mal-amide-PEG6-Val-Cit-PAB-OH | 516206 | 3034751-42-0 | C40H63N7O14 | 865.4 |
| Mal-PEG8-amide-Val-Ala-Exatecan | 5116208 | N/A | C58H78FN7O18 | 1179.539 |
| 4-((S)-2-((S)-2-amino-3-methylbutanamido)propanamido)benzyl ((1S,9S)-9-ethyl-5-fluoro-9-hydroxy-4-methyl-10,13-dioxo-2,3,9,10,13,15-hexahydro-1H,12H-benzo[de]pyrano[3′,4′:6,7]indolizino[1,2-b]quinolin-1-yl)carbamate | 51058 | 2845164-91-0 | C40H43FN6O8 | 754.82 |
| MC-Val-Cit-PAB-PNP | 51057 | 159857-81-5 | C35H43N7O11 | 737.8 |
| MC-Val-Ala-PAB-OH | 51056 | 1870916-87-2 | C25H34N4O6 | 486.56 |
| MC (C5)-Val-Cit | 51055 | 2504147-59-3 | C20H31N5O7 | 453.5 |
| SPDP-Val-Cit-PAB-PNP | 51054 | N/A | C33H39N7O9S2 | 741.8 |
| SPDP-Val-Cit-PAB-OH | 51053 | N/A | C26H36N6O5S2 | 576.7 |
| Alloc-Val-Ala-PAB | 51051 | 1343407-91-9 | C19H27N3O5 | 377.4 |
| DBCO-PEG4-Val-Ala-PAB | 5114804 | 2348405-92-3 | C45H57N5O10 | 827.9 |
| Boc-PEG2-Val-Cit-PAB-OH | 512702 | 2055024-55-8 | C30H50N6O9 | 638.75 |
| endo BCN-PEG3-VC-PFP Ester | 5196303 | 2353409-45-5 | C37H50F5N5O10 | 819.8 |
| endo BCN-PEG3-Val-Cit | 511203 | N/A | C31H51N5O10 | 653.8 |
| Azido-PEG3-Val-Cit-PAB-PNP | 516603 | 2055047-18-0 | C34H47N9O12 | 773.8 |
| Azido-PEG4-Val-Cit-PAB-OH | 516604 | 2055024-64-9 | C29H48N8O9 | 652.8 |
| Boc-PEG4-Val-Cit-PAB-OH | 512704 | 2055024-54-7 | C34H58N6O11 | 726.86 |
| Boc-PEG6-Val-Cit-PAB-OH | 512706 | 2055024-53-6 | C38H66N6O13 | 814.96 |
| 6-Azidohexanoyl-Val-Cit-PAB | 51047 | 1613321-01-9 | C24H38N8O5 | 518.61 |
| DBCO-PEG4-Val-Cit-PAB-PNP | 514804 | 2226472-28-0 | C55H66N8O15 | 1079.2 |
| DBCO-PEG3-Val-Cit-PAB-PNP | 514803 | N/A | C53H62N8O14 | 1035.12 |
| Alkyne-Val-Cit-PAB-PNP | 51042 | 2748039-77-0 | C31H38N6O9 | 638.75 |
| Alkyne-Val-Cit-PAB-OH | 51041 | 2748039-76-9 | C24H35N5O5 | 473.6 |
| Fmoc-PEG2-Val-Cit-PAB-OH | 512902 | 2055024-59-2 | C40H52N6O9 | 760.88 |
| Fmoc-PEG4-Val-Cit-PAB-OH | 512904 | 2055024-58-1 | C44H60N6O11 | 848.98 |
| Fmoc-PEG6-Val-Cit-PAB-OH | 512906 | 2055024-57-0 | C48H68N6O13 | 937.09 |
| NH2-PEG6-Val-Cit-PAB-OH | 514606 | 2055024-60-5 | C33H58N6O11 | 714.85 |
| Z-Val-Cit-OH | 51032 | 159858-06-7 | C19H28N4O6 | 408.45 |
| Z-Val-Ala-OH | 51031 | 24787-89-1 | C16H22N2O5 | 322.36 |
| Z-Val-Osu | 51030 | 583238 | C17H20N2O6 | 348.35 |
| Boc-Val-Ala-PAB-PNP | 51029 | 1884578-00-0 | C27H34N4O9 | 558.58 |
| Boc-Val-Ala-PAB | 51028 | 1884577-99-4 | C20H31N3O5 | 393.48 |
| Boc-Val-Cit-OH | 51027 | 870487-08-4 | C16H30N4O6 | 374.43 |
| Boc-Val-Ala-OH | 51026 | 70396-18-8 | C13H24N2O5 | 288.34 |
| Boc-Val-Osu | 51025 | 545287 | C14H22N2O6 | 314.33 |
| NH2-PEG1-Val-Cit-PAB-OH | 514601 | 2055024-63-8 | C23H38N6O6 | 494.58 |
| NH2-PEG3-Val-Cit-PAB-OH | 514603 | 2055024-62-7 | C27H46N6O8 | 582.69 |
| NH2-PEG4-Val-Cit-PAB-OH | 514604 | 2055024-61-6 | C29H50N6O9 | 626.74 |
| Alloc-Val-Ala-PAB-PNP | 51020 | 1884578-27-1 | C26H30N4O9 | 542.54 |
| Alloc-Val-Ala-OH | 51019 | 330970-70-2 | C12H20N2O5 | 272.13 |
| (9H-fluoren-9-yl)methyl ((S)-3-methyl-1-(((S)-1-((4-((((4-nitrophenoxy)carbonyl)oxy)methyl)phenyl)amino)-1-oxo-5-ureidopentan-2-yl)amino)-1-oxobutan-2-yl)carbamate | 863971-53-3 | C40H42N6O10 | 766.8 | |
| NH2-PEG-DMG,2K | 55162K | N/A | N/A | 2000 |
| DSPE-PEG2K-CH2CH2COOH | 55182K | N/A | N/A | 2000 |
| DSPE-PEG-CH₂CH₂COONHS,2K | 55122K | N/A | N/A | 2000 |
| DSG-PEG-NH2,2K | 55152K | N/A | N/A | 2000 |
| mPEG-DAG,2K | 56862K | N/A | N/A | 2000 |
| mPEG-DAPE,2K | 56852K | N/A | N/A | 2000 |
| Mal-NH-PEG-DAG,2K | 55142K | N/A | N/A | 2000 |
| IOX-1 | 71005 | 5852-78-8 | C10H7NO3 | 189.17 |
| tert-Butyl ((S)-1-((2S,4R)-4-hydroxy-2-(((S)-1-(4-(4-methylthiazol-5-yl)phenyl)ethyl)carbamoyl)pyrrolidin-1-yl)-3,3-dimethyl-1-oxobutan-2-yl)carbamate | 73016 | 1997302-16-5 | C28H40N4O5S | 544.71 |
| (2S,4R)-4-Hydroxy-N-[(1S)-1-[4-(4-methyl-5-thiazolyl)phenyl]ethyl]-2-pyrrolidinecarboxamide | 73015 | 2086301-12-2 | C17H21N3O2S | 331.43 |
| tert-Butyl (2S,4R)-4-hydroxy-2-(((S)-1-(4-(4-methylthiazol-5-yl)phenyl)ethyl)carbamoyl)pyrrolidine-1-carboxylate | 73014 | 2313528-38-8 | C22H29N3O4S | 431.55 |
| (S)-1-(4-(4Methylthiazol-5-yl)phenyl)ethan-1-amineHCl | 73013 | 1948273-01-5 | C12H15ClN2S | 254.78 |
| tert-butyl (S)-(1-(4-(4-methylthiazol-5-yl)phenyl)ethyl)carbamate | 73012 | 1973408-97-7 | C17H22N2O2S | 318.43 |
| tert-Butyl [(S)-1-(4-bromophenyl)ethyl]carbamate | 73011 | 847728-89-6 | C13H18BrNO2 | 300.19 |
| tert-butyl ((S)-1-((2S,4R)-4-hydroxy-2-((4-(4-methylthiazol-5-yl)benzyl)carbamoyl)pyrrolidin-1-yl)-3,3-dimethyl-1-oxobutan-2-yl)carbamate | 73010 | 1448189-98-7 | C27H38N4O5S | 530.68 |
| (2S,4R)-4-hydroxy-N-(4-(4-methylthiazol-5-yl)benzyl)pyrrolidine-2-carboxamide | 73009 | 1448189-45-4 | C16H19N3O2S | 317.41 |
| tert-butyl (2S,4R)-4-hydroxy-2-((4-(4-methylthiazol-5-yl)benzyl)carbamoyl)pyrrolidine-1-carboxylate | 73008 | 1448191-54-5 | C21H27N3O4S | 417.52 |
| (4-(4-Methylthiazol-5-yl)phenyl)methanamine hydrochloride | 73007 | 1448189-30-7 | C11H13ClN2S | 240.75 |
| tert-butyl (4-(4-methylthiazol-5-yl)benzyl)carbamate | 73006 | 68819-84-1 | C16H20N2O2S | 304.41 |
| tert-butyl (4-bromobenzyl)carbamate | 73005 | 68819-84-1 | C12H16BrNO2 | 286.16 |
| tert-butyl (S)-2-(5-(4-chlorophenyl)-6,7-dimethyl-2-oxo-2,3-dihydro-1H-thieno[2,3-e][1,4]diazepin-3-yl)acetate | 73004 | 1268524-67-9 | C21H23ClN2O3S | 418.94 |
| tert-butyl (S)-3-amino-4-((3-(4-chlorobenzoyl)-4,5-dimethylthiophen-2-yl)amino)-4-oxobutanoate | 73003 | 1268524-66-8 | C21H25ClN2O4S | 436.95 |
| tert-butyl (S)-3-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-4-((3-(4-chlorobenzoyl)-4,5-dimethylthiophen-2-yl)amino)-4-oxobutanoate | 73002 | 1268524-65-7 | C36H35ClN2O6S | 659.19 |
| (2-amino-4,5-dimethylthiophen-3-yl)(4-chlorophenyl)methanone | 73001 | 50508-66-2 | C13H12ClNOS | 265.76 |
| (S,R,S)-AHPC-Me | 71004 | 1948273-02-6 | C23H32N4O3S | 444.59 |
| (S,R,S)-AHPC | 71003 | 1448297-52-6 | C22H30N4O3S | 430.56 |
| (+)-JQ-1 | 71002 | 1268524-70-4 | C23H25ClN4O2S | 456.99 |
| (+)JQ-1(carboxylic acid) | 71001 | 202592-23-2 | C19H17ClN4O2S | 400.88 |
