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3-(cyclohexylamino)-1-propanesulfonic acid, 3-cyclohexylaminopropanesulfonic acid,
N-cyclohexyl-3-aminopropanesulfonic acid

Technical Data

CAS Number: 1135-40-6
Molecular Formula: C9H19NO3S
Molecular Weight: 221.32
Beilstein Registry Number: 2835588
EC Number: 214-492-1

FabriChem Specifications

Assay (from N)99.0% Min.
AppearanceWhite Powder
Solubility (5% in H2O)Clear and Complete
Moisture ( LOD )1.0% Max.
Pka (25°C)10.2 – 10.6
pH ( 1% in H2O )4.9 – 6.0
UV (0.5M in H2O):
A250 nm0.05 Max
A280 nm0.10 Max

Molecular Structure



CAPS [3-(cyclohexylamino)-1-propanesulfonic acid] is one of the known buffering agents used for biochemical and biological research. These buffering agents are now collectively referred to as “Good’s Buffers”. Good’s Buffers are important tools used in modern biological laboratories for a variety of their properties, including but not limited to being zwitterionic (aka hybrid or dipolar) compounds.