Propargyl-PEG4-S-PEG4-t-butyl ester

    WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 122029

CAS#: 2055041-18-2

Description: Propargyl-PEG4-S-PEG4-t-butyl ester is a PEG linker containing a propargyl group and t-butyl group. The propargyl groups can react with azide-bearing compounds or biomolecules via copper catalyzed azide-alkyne Click Chemistry to yield stable triazole linkages. t-butyl ester is a better leaving group compared to a hydroxyl group. The hydrophilic PEG spacer increases solubility in aqueous media.

Chemical Structure

Propargyl-PEG4-S-PEG4-t-butyl ester
CAS# 2055041-18-2

Theoretical Analysis

MedKoo Cat#: 122029
Name: Propargyl-PEG4-S-PEG4-t-butyl ester
CAS#: 2055041-18-2
Chemical Formula: C26H48O10S
Exact Mass: 552.30
Molecular Weight: 552.720
Elemental Analysis: C, 56.50; H, 8.75; O, 28.95; S, 5.80

Price and Availability

Size Price Availability Quantity
250mg USD 700 2 Weeks
500mg USD 1200 2 Weeks
1g USD 2000 2 Weeks
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Synonym: Propargyl PEG4 S PEG4 t butyl ester, PEG4-S-PEG4, butyl ester

IUPAC/Chemical Name: tert-butyl 4,7,10,13,19,22,25,28-octaoxa-16-thiahentriacont-30-ynoate


InChi Code: InChI=1S/C26H48O10S/c1-5-7-28-9-11-30-13-15-32-17-19-34-21-23-37-24-22-35-20-18-33-16-14-31-12-10-29-8-6-25(27)36-26(2,3)4/h1H,6-24H2,2-4H3


Appearance: To be determined

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: To be determined

Shelf Life: >2 years if stored properly

Drug Formulation: To be determined

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Product Data:

Preparing Stock Solutions

The following data is based on the product molecular weight 552.720000000000000000000000000000 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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