[2-[2-[2-[2-(2-Methoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]acetic acid

CAS NO.：16142-03-3
Empirical Formula: C13H26O8
Molecular Weight: 310.34
MDL number: MFCD30536160
SAFETY DATA SHEET (SDS)
Update Date: 2026-05-28 05:32:16

What is [2-[2-[2-[2-(2-Methoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]acetic acid?

Description

m-PEG6-CH2COOH is a PEG linker containing a terminal carboxylic acid. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond. The hydrophilic PEG spacer increases solubility in aqueous media.

Biological Activity

m-PEG5-CH2COOH is a non-cleavable ADC linker for the synthesis of antibody-drug conjugates (ADCs). It is also a PEG-based PROTAC linker, which can be used for PROTAC synthesis.

in vitro

ADCs are comprised of an antibody to which is attached an ADC cytotoxin through an ADC linker.
PROTACs contain two different ligands connected by a linker; one is a ligand for an E3 ubiquitin ligase and the other is for the target protein. PROTACs exploit the intracellular ubiquitin-proteasome system to selectively degrade target proteins.

Properties of [2-[2-[2-[2-(2-Methoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]acetic acid

Boiling point:	418.6±40.0 °C(Predicted)
Density	1.124±0.06 g/cm3(Predicted)
pka	3.39±0.10(Predicted)
form	Liquid
color	Colorless to light yellow

Safety information for [2-[2-[2-[2-(2-Methoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]acetic acid

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P270:Do not eat, drink or smoke when using this product. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P330:Rinse mouth. P362:Take off contaminated clothing and wash before reuse. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P302+P352:IF ON SKIN: wash with plenty of soap and water. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P332+P313:IF SKIN irritation occurs: Get medical advice/attention. P337+P313:IF eye irritation persists: Get medical advice/attention. P405:Store locked up. P403+P233:Store in a well-ventilated place. Keep container tightly closed. P501:Dispose of contents/container to..…

Computed Descriptors for [2-[2-[2-[2-(2-Methoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]acetic acid

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1-{2-[2-(2-{2-[2-(2-Bromo-ethoxy)-ethoxy]-ethoxy}-ethoxy)-ethoxy]-ethoxy}-2-methoxy-ethane