p-Naphtholbenzein

Product Name: p-Naphtholbenzein
CAS No.: 145-50-6
Chemical Name: p-Naphtholbenzein
Synonyms: α-Naphtholbenzein;A-NAPHTHOLBENZEIN;Nsc 9862;8.2-10.0);pha-NaphthoL;p-phtolbenzein;P-NAPTHOLBENZEIN;à-naphtholbenzein;ɑ-Naphtholbenzein;1-NAPHTHOLBENZEIN
CBNumber: CB4450645
Molecular Formula: C27H18O2
Formula Weight: 374.43
MOL File: 145-50-6.mol

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p-Naphtholbenzein Property

Melting point:: 230-235 °C(lit.)
Boiling point:: 463.44°C (rough estimate)
Density: 1.0946 (rough estimate)
bulk density: 120-300kg/m3
vapor density: 12.9 (vs air)
refractive index: 1.4875 (estimate)
storage temp.: Store at +5°C to +30°C.
solubility: Solubility Insoluble in water; soluble in ethanol, methanol
pka: 8.95(at 25℃)
form: Liquid
color: Pale Red-Brown
PH Range: Green (0.0) to yellow (0.8);Yellow (8.2) to green-blue (11.0)
Odor: Odorless
PH: 0.0, green
0.8, yellow
10.0, blue-green
8.2, yellow
Water Solubility: insoluble
λmax: 210nm
ε(extinction coefficient): ≥50000 at 207-213nm in methanol at 0.01g/L
BRN: 3471575
Stability:: Stable. Combustible. Incompatible with strong oxidizing agents.
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-
InChIKey: VDDWRTZCUJCDJM-SOYKGTTHSA-N
SMILES: Oc1ccc(\C(c2ccccc2)=C3\C=CC(=O)c4ccccc34)c5ccccc15
CAS DataBase Reference: 145-50-6(CAS DataBase Reference)
EPA Substance Registry System: 1(4H)-Naphthalenone, 4-[(4-hydroxy-1-naphthalenyl)phenylmethylene]- (145-50-6)

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Safety

Hazard Codes: Xi
Risk Statements: 36/37/38
Safety Statements: 26-36-37/39
WGK Germany: 3
F: 10-21
TSCA: TSCA listed
HS Code: 29145000
Storage Class: 11 - Combustible Solids
Hazard Classifications: Aquatic Chronic 4

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 291099
Product name: α-Naphtholbenzein
Purity: indicator grade
Packaging: 5g
Price: $62
Updated: 2025/07/31

Sigma-Aldrich

Product number: 291099
Product name: α-Naphtholbenzein
Purity: indicator grade
Packaging: 25g
Price: $221
Updated: 2025/07/31

Sigma-Aldrich

Product number: 1.06202
Product name: 1-Naphtholbenzein
Purity: indicator Reag. Ph Eur
Packaging: 5G
Price: $104
Updated: 2025/07/31

TCI Chemical

Product number: N0028
Product name: p-Naphtholbenzein
Packaging: 25g
Price: $267
Updated: 2025/07/31

Sigma-Aldrich

Product number: 70480
Product name: α-Naphtholbenzein
Purity: indicator (pH 8.2-10.0)
Packaging: 10g
Price: $110
Updated: 2025/07/31

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p-Naphtholbenzein Chemical Properties,Usage,Production

Chemical Properties

deep red to rust-coloured crystals

Uses

alpha-Naphtholbenzein is a pH indicator (pH 0.0-0.8/ pH 8.2-10.0). Dyes and metabolites.

p-Naphtholbenzein Preparation Products And Raw materials

Raw materials

Preparation Products

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p-Naphtholbenzein Suppliers

Americas 1 Austria 1 Belgium 1 Canada 1 China 161 Europe 5 Germany 4 India 30 Japan 5 Poland 1 Slovakia 1 South Korea 1 Switzerland 2 United Kingdom 9 United States 38 Global 261

Beijing Nordhuns Chemical Technology Co.,Ltd

Tel: 010-84929330 13811281791
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Email: info@nordhuns.com
Country: China
ProdList: 299
Advantage: 58

BIOISCO(Lianyungang, Jiangsu) Biotechnology Co., Ltd

Tel: 18082049515
Email: 2757382053@qq.com
Country: China
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J & K SCIENTIFIC LTD.

Tel: 18210857532; 18210857532
Fax: 86-10-82849933
Email: jkinfo@jkchemical.com
Country: China
ProdList: 96815
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Alfa Aesar

Tel: 400-6106006
Fax: 021-67582001/03/05
Email: saleschina@alfa-asia.com
Country: China
ProdList: 30123
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TCI (Shanghai) Development Co., Ltd.

Tel: 021-67121386
Fax: 021-67121385
Email: Sales-CN@TCIchemicals.com
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Energy Chemical

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Adamas Reagent, Ltd.

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Shanghai Hanhong Scientific Co.,Ltd.

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Sichuan Kulinan Technology Co., Ltd

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RYSS TECH LTD

Tel: 400-188-0725 +86 21 34310725 13611771617
Fax: +86 21 34311076
Country: China
ProdList: 2002
Advantage: 57

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View Lastest Price from p-Naphtholbenzein manufacturers

Henan Fengda Chemical Co., Ltd

Product: p-Naphtholbenzein 145-50-6
Price: US $5.00-2.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: g-kg-tons, free sample is available
Release date: 2024-04-16

Career Henan Chemical Co

Product: α-Naphtholbenzein 145-50-6
Price: US $9.80/KG
Min. Order: 1g
Purity: ＞98%
Supply Ability: 20 tons
Release date: 2020-02-10

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