| Identification | More | [Name]
p-Naphtholbenzein | [CAS]
145-50-6 | [Synonyms]
1-NAPHTHOLBENZEIN
4-[(4-HYDROXY-1-NAPHTHALENYL)PHENYLMETHYLENE]-1(4H)-NAPHTHALENONE
ALPHA,ALPHA-BIS(4-HYDROXY-1-NAPHTHYL)BENZYL ALCOHOL
ALPHA-NAPHTHOLBENZEIN
A-NAPHTHOLBENZEIN
LABOTEST-BB LT00452038
P-NAPHTHOLBENZEIN
P-NAPHTHOLBENZEIN (ALPHA)
P-NAPHTHOLBENZEIN INDICATOR
P-NAPHTHOLBENZEIN TS
P-NAPTHOLBENZEIN
4-[(4-hydroxy-1-naphthalenyl)phenylmethylene]-1(4h)-naphthalenon
4,4’-(α-Hydroxybenzylidene)di-1-naphthol
4-(alpha-(4-hydroxy-1-naphthyl)benzylidene)naphthalen-1(4H)-one
ALPHA-NAPHTHOLBENZEIN, INDICATOR GRADE
P-NAPHTHOLBENZEIN(ALPHA-)(0.2% IN ACETIC ACID)[FOR NON-AQUEOUS TITRATION]
P-NAPHTHOLBENZEIN(ALPHA-)(10% IN CA. 95% ETHANOL) [FOR PH DETERMINATION]
1-Naphtholbenzein(PhIndicator)-(P-Naphtholbenzein)
1-Naphtholbenzein(PhIndicator)
1-NAPHTHOL BENZEIN ( ALPHA-NAPHTHOL BENZEIN) pH INDICATOR | [EINECS(EC#)]
230-116-9 | [Molecular Formula]
C27H18O2 | [MDL Number]
MFCD00078492 | [Molecular Weight]
374.43 | [MOL File]
145-50-6.mol |
| Chemical Properties | Back Directory | [Appearance]
deep red to rust-coloured crystals | [Melting point ]
230-235 °C(lit.) | [Boiling point ]
463.44°C (rough estimate) | [bulk density]
120-300kg/m3 | [density ]
1.0946 (rough estimate) | [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 | [form ]
Liquid | [pka]
8.95(at 25℃) | [color ]
Pale Red-Brown | [Odor]
Odorless | [PH]
0.0, green
0.8, yellow
10.0, blue-green
8.2, yellow | [PH Range]
Green (0.0) to yellow (0.8);Yellow (8.2) to green-blue (11.0) | [Stability:]
Stable. Combustible. Incompatible with strong oxidizing agents. | [Water Solubility ]
insoluble | [ε(extinction coefficient)]
≥50000 at 207-213nm in methanol at 0.01g/L | [λmax]
210nm | [BRN ]
3471575 | [InChIKey]
VDDWRTZCUJCDJM-SOYKGTTHSA-N | [CAS DataBase Reference]
145-50-6(CAS DataBase Reference) | [EPA Substance Registry System]
145-50-6(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
S37/39:Wear suitable gloves and eye/face protection . | [WGK Germany ]
3
| [F ]
10-21 | [TSCA ]
Yes | [HS Code ]
29145000 |
| Hazard Information | Back Directory | [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. |
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