CAPSO sodium salt

Synonym(s):3-(Cyclohexylamino)-2-hydroxy-1-propanesulfonic acid sodium salt

CAS NO.：102601-34-3
Empirical Formula: C9H20NNaO4S
Molecular Weight: 261.31
MDL number: MFCD00070063
EINECS: 700-631-8
SAFETY DATA SHEET (SDS)
Update Date: 2026-05-28 00:43:59

What is CAPSO sodium salt?

Chemical properties

White powder

The Uses of CAPSO sodium salt

CAPSO (N-cyclohexyl-2-hydroxyl-3-aminopropanesulfonic acid) sodium salt is used to formulate CAPSO buffer, a zwitterionic buffer that is useful in the range of pH 8.9 - 10.3. CAPSO buffer is used in western and immunoblotting experiments as well as protein sequencing and identification. Used in the electrotransfer of proteins to PVDF (sc-3723) or nitrocellulose membranes (sc-3718, sc-3724). CAPSO is not one of the original " Good " buffers, although it has a similar structure to the other propanesulfonic acids and was selected as a highly water soluble buffering reagent with an optimum buffering pH of 10.4 and minimal reactivity with enzymes or proteins, minimal salt effects.

What are the applications of Application

CAPSO sodium salt is used in immunoblotting experiments, protein sequencing and identification

Properties of CAPSO sodium salt

Boiling point:	601.2℃ at 101.325kPa
Density	1.369 at 20℃
vapor pressure	0-0Pa at 25℃
storage temp.	Inert atmosphere,Room Temperature
form	Crystalline Powder
color	White
pka	9.6(at 25℃)
PH Range	8.9 - 10.3
InChI	InChI=1S/C9H19NO4S.Na.H/c11-9(7-15(12,13)14)6-10-8-4-2-1-3-5-8;;/h8-11H,1-7H2,(H,12,13,14);;
CAS DataBase Reference	102601-34-3(CAS DataBase Reference)

Safety information for CAPSO sodium salt

Signal word	Danger
Pictogram(s)	Corrosion Corrosives GHS05
GHS Hazard Statements	H318:Serious eye damage/eye irritation
Precautionary Statement Codes	P280:Wear protective gloves/protective clothing/eye protection/face protection.