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N8257

α-Naphtholphthalein

Name: α-Naphtholphthalein
Brand: SIGMA

>80% purity NaOH basis (titration), practical grade, powder

Synonym(s):

1-Naphtholphthalein; 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one

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About This Item

Empirical Formula (Hill Notation):

C₂₈H₁₈O₄

CAS Number:

596-01-0

Molecular Weight:

418.44

Beilstein:

97816

EC Number:

209-875-5

MDL number:

MFCD00036202

UNSPSC Code:

12171500

PubChem Substance ID:

24897859

NACRES:

NA.47

product name

α-Naphtholphthalein, practical grade

grade

practical grade

Quality Level

200

Assay

>80% NaOH basis (titration)

form

powder

pH

7.3-8.7, colorless to blue-green

mp

238-240 °C (lit.)

solubility

ethanol: 50 mg/mL, clear, red-orange

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

Oc1ccc(c2ccccc12)C3(OC(=O)c4ccccc34)c5ccc(O)c6ccccc56

InChI

1S/C28H18O4/c29-25-15-13-23(17-7-1-3-9-19(17)25)28(22-12-6-5-11-21(22)27(31)32-28)24-14-16-26(30)20-10-4-2-8-18(20)24/h1-16,29-30H

InChI key

HQHBAGKIEAOSNM-UHFFFAOYSA-N

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Related Categories

Hematology Stains

Histology Stains

General description

α-Naphtholphthalein, a phthalein dye is a pH indicator between 7.3 (colorless) and 8.7 (greenish-blue). Applications include inks, markers, detecting viable cells, food storage, and many more.

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Phosphorescent sensing of carbon dioxide based on secondary inner-filter quenching.

I M Pérez de Vargas-Sansalvador et al.

Analytica chimica acta, 655(1-2), 66-74 (2009-11-21)

A study of different strategies to prepare phosphorescence-based sensors for gaseous CO(2) determination has been performed. It includes the characterization of different configurations tested, a discussion of the results obtained and possibilities for the future. The optical sensor for gaseous

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