| Payment & Shipping Terms | Supply Capacity | ||
|---|---|---|---|
| Payment Terms: | T/T, WU | Production Capacity: | 5000T/year |
| Min. Order: | 25KG | Packing: | according to the customer's requirements |
| Means of Transport: | Ocean, Air, Land | Delivery Date: | 7 days |
Fluorescent Brightener 393 CAS: 1533-45-5
| Item | Index |
|---|---|
| Appearance | Yellow crystal powder |
| Melting point | 351-353℃ |
| Solidity content | ≥98% |
| Fineness of grains | ≤120 meshes |
Fluorescent Brightener 393 absorb high energy radiation in the ultraviolet to violet region (330nm-380nm) on the part of characteristic molecules and emit lower energy radiation in blue region in visible spectrum (400nm-450nm),
which yields the counteracting the yellowing appearance.
FWA should be transparent on the substrate and should not absorb the visible region of the spectrum.
Many FWAs contain the structure of stilbene. Stilbene is an unsaturated hydrocarbon with the formula C6H5CH=CHC6H5.
Other nucleus of FWAs are coumarin, imidazole, 1,3-diphenyl-2-pyrazolin, naphtalimid, benzoxazole and heteroaromatics.
| CAS Number | 1533-45-5 |
|---|---|
| Molecular Formula | C28H18N2O2 |
| Molecular Weight | 414.45 |
| Melting Point | >300 °C(lit.) |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Flashing point | 285.1°C |
| Boiling point | 566.8°C at 760 mmHg |
| Vapour pressure | 2.79E-12mmHg at 25°C |
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