Acid PEGs
Acid PEGs are carboxyl-functional PEG derivatives widely used in coupling reactions, activated ester synthesis, and bioconjugation workflows. Also known as carboxy PEG compounds, these reagents are ideal for attaching PEG chains to amines and biomolecules in drug delivery, diagnostics, and life science research.
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![Molecular structure for PEG 3-[2-[2-(2-Azidoethoxy)ethoxy]ethoxy]propanoic acid (CAS 1056024-94-2), also known as Azido-dPEG4-acid, from Frontier Specialty Chemicals.](https://frontierspecialtychemicals.com/wp-content/uploads/2026/10/AMTGC715-PA20-Square-510x510-1.png)
Acid PEGs3-[2-[2-(2-Azidoethoxy)ethoxy]ethoxy]propanoic acid (98%)
$210.00 – $630.00 View productsCatalog#: AMTGC715-PA20
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Acid PEGs2-(2-(2-Azidoethoxy)ethoxy)acetic acid (95%)
$80.00 – $710.00 View productsCatalog#:Â AMTGC628-AA20
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Acid PEGs20-Azido-3,6,9,12,15,18-hexaoxaicosan-1-oic acid (96%)
$290.00 – $870.00 View productsCatalog#:AMTGC1433-AC25
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Acid PEGs4-((2-(2-Azidoethoxy)ethyl)amino)-4-oxobutanoic acid (96%)
$140.00 – $420.00 View productsCatalog#: AMTGC1267-OB24
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Acid PEGs1-Azido-16-oxo-3,6,9,12-tetraoxa-15-azanonadecan-19-oic acid (99%)
$130.00 – $390.00 View productsCatalog#:AMTGC1254-AA24
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Acid PEGs10-Oxo-2,5,12-trioxa-9-azatetradecan-14-oic acid (99%)
$80.00 – $240.00 View productsCatalog#:Â AMTGC1270-OT24
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Acid PEGs14-Azido-5-oxo-3,9,12-trioxa-6-azatetradecan-1-oic acid (98%)
$100.00 – $300.00 View productsCatalog#:AMTGC1268-AT24
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Acid PEGs4-((2-(2-(2-Azidoethoxy)ethoxy)ethyl)amino) -4-oxobutanoic acid (99%)
$110.00 – $330.00 View productsCatalog#: AMTGC1239-EB24
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![Molecular structure for PEG 2-[2-(Dodecyloxy)ethoxy]acetic acid (CAS 20858-23-5), also known as C12 alkyl ether carboxylic acid, from Frontier Specialty Chemicals.](https://frontierspecialtychemicals.com/wp-content/uploads/2026/10/AMTGC1221-DD23-Square-510x510-1.png)
Acid PEGs2-[2-(Dodecyloxy)ethoxy]acetic acid (>97%)
$120.00 – $360.00 View productsCatalog#:Â AMTGC1221-DD23
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Acid PEGs11-Azido-5-oxo-3,9-dioxa-6-azaundecan-1-oic acid (96%)
$120.00 – $360.00 View productsCatalog#: AMTGC1272-OA24
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Acid PEGs15-Oxo-2,5,8,11,17-pentaoxa-14-azanonadecan-19-oic acid (97%)
$100.00 – $300.00 View productsCatalog#: AMTGC1271-PA24
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Acid PEGs2,5,8,11-Tetraoxatridecan-13-oic acid (97%)
$80.00 – $240.00 View productsCatalog#: AMTGC1201-DA23
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![Molecular structure for 4-[3-(2-Methoxyethoxy)propylamino]-4-oxobutanoic acid (CAS 184419-48-4), also known as Methoxyethoxypropyl succinamic acid, from Frontier Specialty Chemicals.](https://frontierspecialtychemicals.com/wp-content/uploads/2026/05/AMTGC1256-PA24-Square-510x510-1.png)
Acid PEGs4-[3-(2-Methoxyethoxy)propylamino]-4-oxobutanoic acid (99%)
$60.00 – $180.00 View productsCatalog#: AMTGC1256-PA24
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Acid PEGs14-Azido-3,6,9,12-tetraoxatetradecanoic acid (99%)
$140.00 – $1,250.00 View productsCatalog#: AMTGC721-AT20
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Acid PEGs1-Azido-13-oxo-3,6,9-trioxa-12-azahexadecan-16-oic acid (99%)
$120.00 – $360.00 View productsCatalog#:AMTGC1238-AT24
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Acid PEGs11-Azido-3,6,9-trioxaundecanoic acid (97%)
$66.00 – $540.00 View productsCatalog#: AMTGC502-AT19