Naphtholphthalein

Naphtholphthalein: Naphtholphthalein

IUPAC name

3,3-bis(4-hydroxynaphthalen-1-yl)-2-benzofuran-1-one

Other names

1-Naphtholphthalein, alpha-naphtholphthalein, naphtholphthalein blue

Identifiers

CAS number 596-01-0

PubChem 68993

Beilstein Reference 97816

Jmol-3D images Image 1

SMILES

C1=CC=C2C(=C1)C(=CC=C2O)C3(C4=CC=CC=C4C(=O)O3)C5=CC=C(C6=CC=CC=C65)O

Properties

Molecular formula C₂₈H₁₈O₄

Molar mass 418.44 g mol⁻¹

Appearance Colorless-redish to blue-green solid

Melting point
254 °C, 527 K, 489 °F

Solubility in water Insoluble

Hazards

Main hazards Irritant (Xi)

Y (verify) (what is: Y/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Infobox references

α-Naphtholphthalein (C₂₈H₁₈O₄) is a pH indicator.

External links

http://www.sigmaaldrich.com/catalog/search/ProductDetail?ProdNo=N8257&Brand=SIGMA

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Academic Dictionaries and Encyclopedias

Naphtholphthalein


IUPAC name 3,3-bis(4-hydroxynaphthalen-1-yl)-2-benzofuran-1-one
Other names 1-Naphtholphthalein, alpha-naphtholphthalein, naphtholphthalein blue
Identifiers
CAS number	596-01-0
PubChem	68993
Beilstein Reference	97816
Jmol-3D images	Image 1
SMILES C1=CC=C2C(=C1)C(=CC=C2O)C3(C4=CC=CC=C4C(=O)O3)C5=CC=C(C6=CC=CC=C65)O
Properties
Molecular formula	C₂₈H₁₈O₄
Molar mass	418.44 g mol⁻¹
Appearance	Colorless-redish to blue-green solid
Melting point	254 °C, 527 K, 489 °F
Solubility in water	Insoluble
Hazards
Main hazards	Irritant (Xi)
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references