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Aminobenzoic acids and derivatives

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1

Medchemexpress LLC Methoxyacetic acid | 625-45-6 | MFCD00004308 | 100.0% | 90.08 g/mol | C3H6O3 | 100g
SDP

Methoxyacetic acid is a metabolite of ethylene glycol monomethyl ether When the concentration of methoxyacetic acid reaches a certain level it can inhibit the respiratory function of hepatic mitochondria and testicular mitochondria Methoxyacetic acid is somewhat toxic[1][2]

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2

Apexbio Technology LLC Amino-PEG2-C2-acid 791028-27-8 5g
SDP

Amino-PEG2-C2-acid (CAS 791028-27-8) is a bifunctional polyethylene glycol (PEG)-based linker featuring both amino and carboxyl functional groups It is primarily utilized in the synthesis of antibody-drug conjugates (ADCs) facilitating the covalent attachment of active pharmaceutical molecules to antibodies By introducing a short hydrophilic PEG spacer Amino-PEG2-C2-acid can enhance solubility and modulate the pharmacokinetic properties of conjugated compounds The compound s dual reactivity enables efficient conjugation strategies in biomedical research and drug development

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3

Medchemexpress LLC Amino-peg3-c2-acid | 784105-33-5 | MFCD21607085 | 99.9% | 221.25 g·mol⁻¹ | C9H19NO5 | 1 G
SDP

Amino-PEG3-C2-acid is a bifunctional PEG-based linker with terminal amino and carboxylic acid groups, designed for conjugation chemistry in PROTAC and antibody-drug conjugate synthesis. Intended for research use only.

  • Short PEG spacer with three ethylene glycol units.
  • Terminal amino and carboxylic acid functional groups.
  • Suitable for PROTAC and ADC linker synthesis.
  • High purity (99.94%).
  • Available in pack sizes including 1 g.

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4

Medchemexpress LLC Acid-PEG3-SS-PEG3-acid | 2055014-98-5 | 98.0% | 474.59 g/mol | C18H34O10S2 | 25 MG
SDP

Acid-PEG3-SS-PEG3-acid is a cleavable six-unit polyethylene glycol (PEG) linker used in the synthesis of antibody-drug conjugates (ADCs). The molecule has carboxylic acid termini that enable amide-coupling bioconjugation and a disulfide (SS) linkage that allows intracellular cleavage under reducing conditions.

  • Cleavable six-unit PEG linker
  • Carboxylic acid termini for amide coupling
  • Disulfide (SS) cleavable linkage for intracellular release
  • Supplied in multiple pack sizes for research use

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5

Medchemexpress LLC Acid-PEG2-ss-PEG2-acid | 1807539-10-1 | 95.0% | 386.48 g/mol | C14H26O8S2 | 25 MG
SDP

Acid-PEG2-SS-PEG2-acid is a cleavable four-unit polyethylene glycol (PEG) linker used to synthesize antibody-drug conjugates (ADCs). It contains an internal disulfide bond that enables intracellular cleavage and release of conjugated payloads, and acid termini suitable for conjugation chemistry.

  • Provides cleavable disulfide linkage for intracellular release.
  • Four-unit PEG spacer increases solubility and flexibility.
  • Acid termini enable conjugation to carboxyl-reactive chemistries.
  • Suitable for ADC synthesis and bioconjugation research.
  • Available in small pack sizes for research use.

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6

Medchemexpress LLC 29-amino-3,6,9,12,15,18,21,24,27-nonaoxanonacosan-1-ol | 129449-09-8 | MFCD28385478 | >95.0% | 457.56 g/mol | C20H43NO10 | 1 G
SDP

Amino-PEG10-OH is a 10-unit polyethylene glycol (PEG) linker with a terminal amino group and a hydroxyl group, used as a non-cleavable, hydrophilic spacer in antibody-drug conjugate and PROTAC synthesis to improve solubility and control spacing between functional moieties.

  • Non-cleavable 10-unit PEG spacer suitable for ADC and PROTAC chemistry.
  • Terminal amino and hydroxyl groups enable versatile conjugation chemistries.
  • Enhances aqueous solubility of conjugates.
  • Provides a predictable linker length for spatial control.
  • Available in small-scale quantities for laboratory research.

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7

Medchemexpress LLC Acid-PEG3-SS-PEG3-acid | 2055014-98-5 | 474.59 g·mol⁻¹ | C18H34O10S2 | 5 MG
SDP

This cleavable six-unit polyethylene glycol (PEG) linker is designed for the synthesis of antibody-drug conjugates (ADCs). It contains a central disulfide bond flanked by PEG3 spacers and terminating carboxylic acid groups, enabling conjugation to payloads and reductive intracellular release.

  • cleavable disulfide (SS) bond for controlled payload release.
  • six-unit PEG scaffold increases solubility and flexibility.
  • terminal carboxylic acid groups enable standard conjugation chemistries.
  • suitable for antibody-drug conjugate (ADC) and bioconjugation workflows.
  • provided in multiple small pack sizes for research use.

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8

Medchemexpress LLC Amino-PEG9-acid | 1191079-83-0 | 485.57 | C21H43NO11 | 1 G
SDP

Amino-PEG9-acid is a polyethylene glycol (PEG)-based linker with a terminal amino group and a carboxylic acid, used as a PROTAC linker and as a non-cleavable ADC linker for antibody-drug conjugates. It provides a hydrophilic spacer useful for conjugation chemistry in bioconjugation and linker design.

  • Is a PEG-based PROTAC linker.
  • Can be used in the synthesis of PROTACs.
  • Functions as a non-cleavable ADC linker for antibody-drug conjugates.
  • Provides a hydrophilic spacer with terminal amino and carboxylic acid groups.
  • Available in multiple package sizes, including 1 g for lab-scale work.

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9

Medchemexpress LLC 3-(2-(2-aminoethoxy)ethoxy)propanoic acid | 791028-27-8 | MFCD20926377 | 99.7% | 177.20 | C7H15NO4 | 500 MG
SDP

Amino-PEG2-C2-acid is a cleavable three-unit polyethylene glycol (PEG) linker intended for research use in the synthesis of antibody-drug conjugates (ADCs) and PROTACs. It provides an amino-functionalized PEG spacer with a terminal propanoic acid group that facilitates conjugation chemistry and linker optimization in bioconjugation workflows.

  • Cleavable three-unit PEG spacer suitable for ADC and PROTAC synthesis.
  • Amino-functionalized for straightforward conjugation chemistry.
  • Terminal carboxylic acid enables diverse coupling strategies.
  • Reported high purity supports research applications.
  • Available in multiple package sizes, including a 500 mg option.

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10

Medchemexpress LLC Acid-PEG3-SS-PEG3-acid | 2055014-98-5 | MFCD28950758 | 98.0% | 474.59 g·mol⁻¹ | C18H34O10S2 | 100 MG
SDP

Acid-PEG3-SS-PEG3-acid is a cleavable six-unit polyethylene glycol (PEG) linker that contains a central disulfide bond and terminal carboxylic acid groups. It is designed as a bioreducible spacer for use in the synthesis of antibody-drug conjugates (ADCs), providing hydrophilicity and a site for conjugation chemistry.

  • Cleavable disulfide (SS) linkage for intracellular payload release.
  • Two PEG3 units provide hydrophilicity and spacer length.
  • Terminal carboxylic acids enable common conjugation chemistries.
  • Molecular weight 474.59 g·mol⁻¹ and formula C18H34O10S2.
  • Available in small research quantities suitable for ADC development.

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11

Medchemexpress LLC Amino-PEG9-acid | 1191079-83-0 | MFCD26127809 | 98.0% | 485.57 g/mol | C21H43NO11 | 250 MG
SDP

Amino-PEG9-acid is a polyethylene glycol (PEG)-based linker used in the synthesis of proteolysis targeting chimeras (PROTACs) and as a non-cleavable linker for antibody-drug conjugates (ADCs). It is typically supplied as a solid with high purity for use in linker chemistry and bioconjugation applications.

  • PEG-based linker with an amino terminus and a terminal carboxylic acid.
  • Suitable for PROTAC and ADC synthesis and other bioconjugation reactions.
  • High purity, suitable for research and synthetic chemistry applications.
  • Soluble in common organic solvents and aqueous mixtures for coupling reactions.
  • Available in multiple package sizes to support small-scale and larger syntheses.

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12

Medchemexpress LLC Acid-PEG2-SS-PEG2-acid | 1807539-10-1 | 95.0% | 386.48 | C14H26O8S2 | 50 MG
SDP

Acid-PEG2-SS-PEG2-acid is a cleavable four-unit polyethylene glycol (PEG) linker that contains a central disulfide bond and terminal carboxylic acids. It is used as a spacer in antibody-drug conjugate (ADC) synthesis and general bioconjugation research, providing controlled release via reductive cleavage and improved solubility from PEGylation.

  • Cleavable disulfide (SS) linkage enabling reductive release.
  • Two PEG2 units provide hydrophilicity and spacing.
  • Terminal carboxylic acids for straightforward conjugation chemistry.
  • Suitable for ADC linker design and other bioconjugation applications.
  • Available in multiple pack sizes for research use only.

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13

Medchemexpress LLC N-(amino-PEG4)-N-bis(PEG4-Boc) | 2093153-97-8 | 98.0% | C40H80N2O16 | 10MG
SDP

N-(Amino-PEG4)-N-bis(PEG4-Boc) is a branched polyethylene glycol (PEG) linker with a Boc-protected amine terminus designed for use in the synthesis of PROTACs and other bioconjugates. It provides a protected amine handle and flexible PEG spacers to facilitate coupling and linker optimization in medicinal chemistry workflows.

  • Boc-protected amine enables selective deprotection and downstream coupling.
  • Branched bis-PEG4 architecture provides two tether points for dual-arm linkers.
  • PEG4 units increase aqueous solubility and spacer flexibility.
  • Supplied as a protected linker ready for synthetic coupling steps.
  • Suitable for PROTAC assembly and diverse bioconjugation strategies.

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14

Medchemexpress LLC Acid-PEG3-SS-PEG3-acid | 2055014-98-5 | 98.0% | 474.59 g/mol | C18H34O10S2 | 250 MG
SDP

Acid-PEG3-SS-PEG3-acid is a cleavable six-unit polyethylene glycol (PEG) linker comprising two PEG3 segments joined by a disulfide bond and terminating in carboxylic acid groups. It is formulated for use in antibody-drug conjugate (ADC) synthesis and related bioconjugation research, and is supplied in small research-scale packages.

  • Cleavable disulfide linker enabling intracellular payload release.
  • Six PEG units (two PEG3 segments) provide spacing and solubility.
  • Terminal carboxylic acids supply sites for conjugation chemistry.
  • Designed for ADC synthesis and related bioconjugation applications.
  • Available in multiple small-scale package sizes for research use.

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15

Medchemexpress LLC 1-Amino-3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48-hexadecaoxahenpentacontan-51-oic acid | 2922656-52-6 | 95.0% | C35H71NO18 | 10MG
SDP

Amino-PEG16-acid is an amine-terminated polyethylene glycol (PEG16) linker designed for use in the chemical synthesis of proteolysis targeting chimeras (PROTACs) and other bifunctional conjugates. It provides a hydrophilic, flexible spacer with reactive termini suitable for orthogonal coupling strategies and is supplied as a research-grade reagent with a reported purity of 95%.

  • Amine-terminated PEG16 linker useful for PROTAC synthesis.
  • Hydrophilic and flexible spacer to improve solubility and reduce steric hindrance.
  • Terminal carboxylic acid and primary amine for orthogonal conjugation chemistries.
  • Reported purity 95.0% suitable for research applications.
  • Molecular weight ~793.93 Da; formula C35H71NO18.

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