Tos-PEG4-t-butyl ester
- CAS NO.：217817-01-1
- Empirical Formula: C20H32O8S
- Molecular Weight: 432.53
- MDL number: MFCD22201544
- Update Date: 2026-05-28 02:24:53
What is Tos-PEG4-t-butyl ester?
Description
Tos-PEG4-t-butyl ester is a PEG linker containing a t-butyl ester and a tosyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The t-butyl protected carboxyl group can be deprotected under acidic conditions. The tosyl group is a very good leaving group for nucleophilic substitution reactions.
Properties of Tos-PEG4-t-butyl ester
| Boiling point: | 528.5±45.0 °C(Predicted) |
| Density | 1.154±0.06 g/cm3(Predicted) |
| storage temp. | 2-8°C |
| form | Liquid |
| color | Colorless to light yellow |
Safety information for Tos-PEG4-t-butyl ester
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection. |
Computed Descriptors for Tos-PEG4-t-butyl ester
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