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Merck
CN

17384

Supelco

Octadecyl 2-(4-dipropylaminophenylazo)benzoate

Selectophore™, ≥99.0%

Synonym(s):

ETH 2418, Propyl red octadecyl ester

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About This Item

Empirical Formula (Hill Notation):
C37H59N3O2
CAS Number:
204581-67-9
Molecular Weight:
577.88
UNSPSC Code:
26111700

Key Documents

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product line

Selectophore™

Quality Level

200

Assay

≥99.0% (HPLC)
≥99.0%

form

liquid

storage temp.

2-8°C

SMILES string

CCCCCCCCCCCCCCCCCCOC(=O)c1ccccc1\N=N/c2ccc(cc2)N(CCC)CCC

InChI

1S/C37H59N3O2/c1-4-7-8-9-10-11-12-13-14-15-16-17-18-19-20-23-32-42-37(41)35-24-21-22-25-36(35)39-38-33-26-28-34(29-27-33)40(30-5-2)31-6-3/h21-22,24-29H,4-20,23,30-32H2,1-3H3

InChI key

YXEYOKDHPZUPRA-UHFFFAOYSA-N

General description

Octadecyl 2-(4-dipropylaminophenylazo)benzoate is a neutral chromoionophore, which can be used for potentiometric,, and optical pH measurements. High selectivity permits pH measurements at normal physiological intracellular pH and also in acidic physiological media.
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Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Legal Information

Selectophore is a trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

12 - Non Combustible Liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

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Certificates of Analysis (COA)

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From molecular recognition to analytical information using chemical sensors: Development of a combined catheter gastric pH-probe.
Spichiger, Ursula E., et al.
Electroanalysis, 7, 859-863 (1995)
Applicability of the phase boundary potential model to the mechanistic understanding of solvent polymeric membrane-based ion-selective electrodes
Bakker, Eric, et al.
Electroanalysis, 7, 817-822 (1995)
Chromoionophore-Mediated Imaging of Water Transport in Ion-Selective Membranes
Zwickl, T., et al.
Analytical Sciences, 14, 57-61 (1998)
Design of pH microelectrodes based on ETH 2418 and their application for measurement of pH profile in instant noodles
Zhang, X., et al.
Analytica Chimica Acta, 445, 57-65 (2001)

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