CAS 145-50-6|α-Naphtholbenzein

Introduction：Basic information about CAS 145-50-6|α-Naphtholbenzein, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.

Table of Contents

1. Names
2. α-Naphtholbenzein BiologicalActivity
3. Chemical & Physical Properties
4. Safety Information
5. Customs
6. Synonyms

Common Name	α-Naphtholbenzein
CAS Number	145-50-6	Molecular Weight	374.431
Density	1.3±0.1 g/cm3	Boiling Point	578.6±50.0 °C at 760 mmHg
Molecular Formula	C₂₇H₁₈O₂	Melting Point	230-235 °C(lit.)
MSDS	ChineseUSA	Flash Point	242.3±22.7 °C

Names

Name	p-Naphtholbenzein
Synonym	More Synonyms

α-Naphtholbenzein BiologicalActivity

Description	α-Naphtholbenzein (p-Naphtolbenzein) is a dye. α-Naphtholbenzein can be used as a pH indicator. α-Naphtholbenzein has a visual transition from yellow (pH0-8.2) to turquoise (pH10). α-Naphtholbenzein is often used during sequential injection analysis technique done for acid-base titrations[1].
Related Catalog	Research Areas >>OthersSignaling Pathways >>Others >>Others
References	[1]. Maskula S, et al. Titration of strong and weak acids by sequential injection analysis technique. Talanta. 2000 May 31;52(1):91-9.

Chemical & Physical Properties

Density	1.3±0.1 g/cm3
Boiling Point	578.6±50.0 °C at 760 mmHg
Melting Point	230-235 °C(lit.)
Molecular Formula	C₂₇H₁₈O₂
Molecular Weight	374.431
Flash Point	242.3±22.7 °C
Exact Mass	374.130676
PSA	37.30000
LogP	7.11
Vapour Pressure	0.0±1.7 mmHg at 25°C
Index of Refraction	1.724
InChIKey	VDDWRTZCUJCDJM-UHFFFAOYSA-N
SMILES	O=C1C=CC(=C(c2ccccc2)c2ccc(O)c3ccccc23)c2ccccc21
Stability	Stable. Combustible. Incompatible with strong oxidizing agents.
Water Solubility	insoluble

Safety Information

Personal Protective Equipment	dust mask type N95 (US);Eyeshields;Gloves
Hazard Codes	Xi:Irritant;
Risk Phrases	R36/37/38
Safety Phrases	S26-S36-S37/39
RIDADR	NONH for all modes of transport
WGK Germany	3
HS Code	29145000

Customs

HS Code	2914501900
Summary	2914501900 other ketone-phenols。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0%

Synonyms

A-NAPHTHOLBENZEIN

Alpha-Naphtholbenzein

4-(α-(4-Hydroxy-1-naphthyl)benzylidene)naphthalen-1(4H)-one

P-NAPHTHOLBENZEIN TS

(E)-4-((4-hydroxynaphthalen-1-yl)(phenyl)methylene)naphthalen-1(4H)-one

1-NAPHTHOLBENZEIN

1(4H)-Naphthalenone, 4-[(4-hydroxy-1-naphthalenyl)phenylmethylene]-, (4E)-

P-NAPTHOLBENZEIN

α-Naphtholbenzein

(4E)-4-[(4-Hydroxy-1-naphthyl)(phenyl)methylene]-1(4H)-naphthalenone

1(4H)-Naphthalenone, 4-[α-(4-hydroxy-1-naphthyl)benzylidene]-

MFCD00078492

EINECS 230-116-9

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