PRODUCT Properties
| Melting point: | 214 °C |
| Boiling point: | 307.77°C (rough estimate) |
| Density | 1.2662 (rough estimate) |
| refractive index | 1.5570 (estimate) |
| pka | 8.59±0.30(Predicted) |
| form | powder to lump |
| color | White to Amber |
| EPA Substance Registry System | 4-(Hydroxyamino)quinoline-1-oxide (4637-56-3) |
Safety
| Symbol(GHS) |    GHS08,GHS05,GHS06 |
| Signal word | Danger |
| Hazard statements | H335-H318-H301-H350-H315-H340-H371 |
| Precautionary statements | P280-P305+P351+P338-P310-P260-P264-P270-P309+P311-P405-P501-P264-P270-P301+P310-P321-P330-P405-P501-P264-P280-P302+P352-P321-P332+P313-P362 |
| Hazard Codes | T |
| Risk Statements | 45-46-25-37/38-41-68 |
| Safety Statements | 53-26-36/37/39-45 |
| RTECS | VB9800000 |
| HS Code | 2933.49.7000 |
