Hydroxy-PEG3-t-butylester

CAS NO.：133803-81-3
Empirical Formula: C11H22O5
Molecular Weight: 234.29
MDL number: MFCD20926380
SAFETY DATA SHEET (SDS)
Update Date: 2025-11-17 15:41:33

What is Hydroxy-PEG3-t-butylester?

Description

Hydroxy-PEG2-t-butyl ester is a PEG linker containing a hydroxyl group with a t-butyl ester. The hydrophilic PEG spacer increases solubility in aqueous media. The hydroxyl group enables further derivatization or replacement with other reactive functional groups. The t-butyl protected carboxyl group can be deprotected under acidic conditions.

The Uses of Hydroxy-PEG3-t-butylester

Hydroxy-PEG2-(CH2)2-Boc is an ADC linker for the synthesis of antibody drug conjugates (ADC), Hydroxy-PEG2-(CH2)2-Boc is derived from patent WO2004008101A2 (compound 196). Hydroxy-PEG2-(CH2)2-Boc can also be used as a PROTAC linker for PROTAC synthesis.

in vitro

ADCs are comprised of an antibody to which is attached an ADC cytotoxin through an ADC linker.

Properties of Hydroxy-PEG3-t-butylester

Boiling point:	321.8±22.0 °C(Predicted)
Density	1.046±0.06 g/cm3(Predicted)
storage temp.	Sealed in dry,Room Temperature
solubility	Soluble in DMSO
pka	14.36±0.10(Predicted)
form	clear liquid
color	Colorless to Almost colorless

Safety information for Hydroxy-PEG3-t-butylester

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H302:Acute toxicity,oral H312:Acute toxicity,dermal H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H332:Acute toxicity,inhalation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.