Molekula

alpha-Naphtholphthalein

SKU 90036332 CAS 596-01-0 Available on enquiry

Supplying 4,500+ customers in over 80 countries

ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Certificate of Analysis with every batch

Alpha-Naphtholphthalein is a pH indicator used in analytical chemistry, particularly in titrations involving strong bases. It changes color from colorless to deep blue in basic solutions. Available in powder form with a purity of ≥98.0% (HPLC), it has a molecular weight of about 418.4 g/mol and a melting point of 240–242 °C. Molekula supplies alpha-Naphtholphthalein from research to bulk quantities with full documentation and ISO 9001:2015 traceability.

This substance is available from Molekula on enquiry. Full specification, Safety Data Sheet and Certificate of Analysis documentation are provided with your quotation once our team confirms the grade and pack size you need.

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Overview

SKU: 90036332
CAS Number: 596-01-0
IUPAC Name: 3,3-bis(4-hydroxynaphthalen-1-yl)-2-benzofuran-1-one
EC Number: 209-875-5
Exact Mass: 418.1205
SMILES: C1=CC=C2C(=C1)C(=CC=C2O)C3(C4=CC=CC=C4C(=O)O3)C5=CC=C(C6=CC=CC=C65)O
InChIKey: HQHBAGKIEAOSNM-UHFFFAOYSA-N
InChI: 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
PubChem CID: 68993

Synonyms

1-Naphtholphthalein
1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxy-1-naphthalenyl)-
3,3-Bis(4-hydroxy-1-naphthyl)phthalide
3,3-bis(4-hydroxynaphthalen-1-yl)-1,3-dihydro-2-benzofuran-1-one
3,3-bis(4-hydroxynaphthalen-1-yl)-2-benzofuran-1-one
3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one
a-naphtholphthalein
a-Naphtolphtalein
Naphtholphthalein
naphtholphthalein blue

Frequently asked questions

What is alpha-Naphtholphthalein used for?

It is primarily used as a pH indicator in analytical chemistry, particularly in titrations involving strong bases.

What is the chemical formula and molecular weight of alpha-Naphtholphthalein?

The chemical formula is C28H18O4, and the molecular weight is about 418.4 g/mol.

How should alpha-Naphtholphthalein be stored?

Store in a cool, dry place, protected from light and moisture, in a tightly sealed container.

What grade is available for alpha-Naphtholphthalein?

It is available in analytical grade, suitable for laboratory use.

Can Molekula supply alpha-Naphtholphthalein in bulk?

Yes, Molekula can supply alpha-Naphtholphthalein in bulk quantities—please contact our sales team for pricing and availability.

What documentation comes with an order of alpha-Naphtholphthalein?

Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) upon request.

Related products

Molekula has supplied fine chemicals and biochemicals since 1999, and its facilities are ISO 9001:2015 and ISO 14001:2015 certified. Every dispatched batch is logged with a batch number and matched to a Certificate of Analysis, and Safety Data Sheets are available in five languages.