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70480

α-Naphtholbenzein

Name: α-Naphtholbenzein
Brand: SIAL

Synonym(s):

4,4′-(α-Hydroxybenzylidene)di-1-naphthol, p-naphtholbenzein

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About This Item

Empirical Formula (Hill Notation):

C₂₇H₁₈O₂

CAS Number:

145-50-6

Molecular Weight:

374.43

NACRES:

NA.21

PubChem Substance ID:

24886093

UNSPSC Code:

12352200

EC Number:

205-656-3

Beilstein/REAXYS Number:

2628063

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Properties

form

powder

Quality Level

100

technique(s)

UV/Vis spectroscopy: suitable

mp

230-235 °C (lit.)

SMILES string

Oc1ccc(\C(c2ccccc2)=C3\C=CC(=O)c4ccccc34)c5ccccc15

InChI

1S/C27H18O2/c28-25-16-14-23(19-10-4-6-12-21(19)25)27(18-8-2-1-3-9-18)24-15-17-26(29)22-13-7-5-11-20(22)24/h1-17,28H/b27-24-

InChI key

VDDWRTZCUJCDJM-PNHLSOANSA-N

Description

General description

α-Naphtholbenzein is a dye generally used during acid-base titration method.

Application

α-Naphtholbenzein has been used as indicator during sequential injection analysis technique done for acid-base titrations.

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hcodes

H413

pcodes

P273 - P501

Hazard Classifications

Aquatic Chronic 4

Storage Class

11 - Combustible Solids

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Titration of strong and weak acids by sequential injection analysis technique.

Maskula, Silla, Johan Nyman, and Ari Ivaska

Talanta, 52.1, 91-99 (2000)

Global Trade Item Number

SKU	GTIN
70480-10G	04061835294282
70480-50G	04061835294299