ALPHA-NAPHTHOLBENZEIN
Synonym(s):4,4′-(α-Hydroxybenzylidene)di-1-naphthol;p-naphtholbenzein
- CAS NO.：6948-88-5
- Empirical Formula: C27H20O3
- Molecular Weight: 392.45
- MDL number: MFCD00003979
- EINECS: 230-116-9
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-28 05:59:24
What is ALPHA-NAPHTHOLBENZEIN?
Chemical properties
RED-BROWN POWDER
The Uses of ALPHA-NAPHTHOLBENZEIN
α-Naphtholbenzein can be used as an indicator during non-aqueous titration.
Purification Methods
-{4-hydroxynaphth-1-yl})-benzyl alcohol] B2319 M 392.5, m 122-125o, ~ 9.3. Crystallise the alcohol from EtOH, aqueous EtOH or glacial acetic acid. pKEst [Beilstein 6 H 1150.B2319]
Properties of ALPHA-NAPHTHOLBENZEIN
| Melting point: | 230-235 °C(lit.) |
| Boiling point: | 477.16°C (rough estimate) |
| Density | 1.1098 (rough estimate) |
| refractive index | 1.5460 (estimate) |
| storage temp. | Amber Vial, Room Temperature |
| solubility | DMSO (Slightly), Methanol (Slightly) |
| form | Powder |
| pka | 9.14±0.40(Predicted) |
| color | Red-brown |
| PH Range | 8.5(YELLOW)-9.8(GREEN) |
| CAS DataBase Reference | 6948-88-5(CAS DataBase Reference) |
Safety information for ALPHA-NAPHTHOLBENZEIN
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for ALPHA-NAPHTHOLBENZEIN
New Products
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