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Supelco

Sodium octyl sulfate

suitable for ion pair chromatography, LiChropur™, ≥99.0% (T)

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Synonym(s):
Octyl sulfate sodium salt
Linear Formula:
CH3(CH2)7OSO3Na
CAS Number:
142-31-4
Molecular Weight:
232.27
Beilstein:
3658635
EC Number:
205-535-5
MDL number:
MFCD00007470
UNSPSC Code:
12000000
PubChem Substance ID:
329766106
NACRES:
NB.21

description

anionic

Quality Level

100

Assay

≥99.0% (T)

form

crystals

quality

LiChropur™

mol wt

232.27 g/mol

technique(s)

ion pair chromatography: suitable

mp

195 °C (dec.) (lit.)

λ

10 % in H2O

UV absorption

λ: 210 nm Amax: 0.1
λ: 220 nm Amax: 0.06
λ: 230 nm Amax: 0.04
λ: 260 nm Amax: 0.02
λ: 500 nm Amax: 0.02

suitability

corresponds to standard for RP gradient test
corresponds to standard for filter test

SMILES string

[Na+].CCCCCCCCOS([O-])(=O)=O

InChI

1S/C8H18O4S.Na/c1-2-3-4-5-6-7-8-12-13(9,10)11;/h2-8H2,1H3,(H,9,10,11);/q;+1/p-1

InChI key

WFRKJMRGXGWHBM-UHFFFAOYSA-M

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General description

Sodium octyl sulfate (SOS) is an ion-pair reagent, an anionic surfactant with an 8-carbon tail suitable for cationic separation sorted by carbon chain length.

Application

Sodium octyl sulfate (SOS) may be used as an ion-pairing reagent:
  • For the retention of catechols in reversed-phase high-performance liquid chromatography of catecholamines and their congeners.
  • For the separation of asymmetric dimethylhydrazine (ADMH) and its decomposition products using ion-pair chromatography.

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Legal Information

LiChropur is a trademark of Merck KGaA, Darmstadt, Germany

WGK

WGK 2

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

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Determination of 1, 1-dimethylhydrazine and its decomposition products using ion-pair chromatography
Ponomarenko SA, et al.
Moscow University Chemistry Bulletin, 64(3), 147-153 (2009)
Reversed-phase high performance liquid chromatography of catecholamines and their congeners with simple acids as ion-paring reagents
Asmus PA and Freed CR
Journal of Chromatography A, 169, 303-311 (1979)
Electrostatic effects on the phase behavior of aqueous cetyltrimethylammonium bromide and sodium octyl sulfate mixtures with added sodium bromide
Brasher LL, et al.
Langmuir, 11(11), 4267-4277 (1995)
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