A6170112
alpha-Naphtholbenzein , 145-50-6
Synonym(s):
1-Naphtholbenzein
CAS NO.：145-50-6
Empirical Formula: C27H18O2
Molecular Weight: 374.43
MDL number: MFCD00078492
EINECS: 205-656-3
| Pack Size | Price | Stock | Quantity |
| 1g | RMB63.20 | In Stock |
|
| 5G | RMB227.20 | In Stock |
|
| 25G | RMB835.20 | In Stock |
|
| others | Enquire |
Update time: 2022-07-08
PRODUCT Properties
| 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 |
| form | Liquid |
| pka | 8.95(at 25℃) |
| 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. |
| InChIKey | VDDWRTZCUJCDJM-SOYKGTTHSA-N |
| 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) |
Description and Uses
alpha-Naphtholbenzein is a pH indicator (pH 0.0-0.8/ pH 8.2-10.0). Dyes and metabolites.
Safety
| Symbol(GHS) |  GHS07 |
| Signal word | Warning |
| Hazard statements | H315-H319-H335 |
| Precautionary statements | P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P261-P280a-P304+P340-P305+P351+P338-P405-P501a |
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 26-36-37/39 |
| WGK Germany | 3 |
| F | 10-21 |
| TSCA | Yes |
| HS Code | 29145000 |
