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Bis-PEG8-acid

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Category	COOH-PEGn-COOH
Catalog NO.	BPG-0177
Product Name	Bis-PEG8-acid
CAS	1246189-43-4
Molecular Formula	C20H38O12
Molecular Weight	470.51

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Description	Bis-PEG8-acid is a PEG linker containing two terminal carboxylic acid groups. The terminal carboxylic acids 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.
Synonyms	HOOC-PEG7-CH2CH2COOH; HOOCCH2CH2O-PEG7-CH2CH2COOH; 4,7,10,13,16,19,22,25-Octaoxaoctacosanedioic acid; Bis-PEG8-COOH; 4,7,10,13,16,19,22,25-Octaoxaoctacosane-1,28-dioic Acid; Di-Acid-PEG8
IUPAC Name	3-[2-[2-[2-[2-[2-[2-[2-(2-carboxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoic acid
Canonical SMILES	C(COCCOCCOCCOCCOCCOCCOCCOCCC(=O)O)C(=O)O
InChI	InChI=1S/C20H38O12/c21-19(22)1-3-25-5-7-27-9-11-29-13-15-31-17-18-32-16-14-30-12-10-28-8-6-26-4-2-20(23)24/h1-18H2,(H,21,22)(H,23,24)
InChIKey	IRTAMFHIULAGCS-UHFFFAOYSA-N
Boiling Point	601.8±55.0°C (Predicted)
Purity	≥95%
Density	1.179±0.06 g/cm3 (Predicted)
Solubility	Soluble in DMSO
Related CAS	51178-68-8 (polymer)
Appearance	Pale Yellow or Colorless Oily Matter
Shelf Life	-20°C 3 years powder; -80°C 2 years in solvent
Storage	Store at 2-8°C for short term (days to weeks) or -20°C for long term (months to years)

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