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CHAPSO

Synonyms

3-([3-cholamidopropyl]dimethylammonio)-2-hydroxy-1-propanesulfonate,
3-[dimethyl(3-{[(3α,5β,7α,12α)-3,7,12-trihydroxy-24-oxocholan-24-yl]amino}propyl)ammonio]-2-hydroxy-1-propanesulfonate,
3-[(3-cholamidopropyl)dimethylamino]-2-hydroxy-1-propanesulfate

Technical Data

CAS Number: 82473-24-3
Molecular Formula: C32H58N2O8S
Molecular Weight: 614.89
Beilstein Registry Number: 5842642

FabriChem Specifications

ITEMSSPECIFICATIONS
Assay (by HPLC)98.0% Min.
AppearanceWhite powder
Solubility (0.5M in H2O)Complete and colorless
Moisture2.0% Max.
Conductance (0.5M in H2O)100 μs/cm Max.
UV (1% in H2O)
A260nm0.10 Max.
A350nm0.01 Max.

Molecular Structure

chapso-structure

About

CHAPS {3-[(3-Cholamidopropyl)dimethylammonio]-1-propanesulfonate} and CHAPSO [3-[(3-cholamidopropyl)dimethylammonio]-2-hydroxy-1-propanesulfonate] are zwitterionic (aka hybrid or dipolar) detergents used in the laboratory to solubilize biological macromolecules such as proteins. They are used as non-denaturing solvents in the process of protein purification and is especially useful in purifying membrane proteins, which are often sparingly soluble or insoluble in aqueous solution due to their native hydrophobicity. CHAPS can also be used in conjunction with nonionic detergents. CHAPSO has the same basic chemical structure as CHAPS, but has an additional hydroxyl functional group.

Both detergents have low light absorbance in the ultraviolet region of the electromagnetic spectrum, which is useful for laboratory workers monitoring ongoing chemical reactions or protein-protein binding with UV/Vis spectroscopy.

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