![5,7-dihydroxy-2-phenyl-4H-benzo[b]pyran-4-one](http://a0.leadongcdn.com/cloud/ipBqpKorRilSknorqnko/20124258192877.gif) |
![5,7-dihydroxy-2-phenyl-4H-benzo[b]pyran-4-one](http://a2.leadongcdn.com/static/assets/images/transparent.png?1778749569234)
| Menge: | |
|---|---|
DY2509
480-40-0
207-549-7
C15H10O4
5,7-dihydroxy-2-phenyl-4H-benzo[b]pyran-4-one
| Index name | Specification |
| Appearance | Light Yellow Powder |
| Assay(HPLC) | 99.0%min |
| Melting Point | 284 to 290 deg C |
| Loss on Drying | 0.5% max |
| Ash | 0.2% max |
| Lead | NMT 2ppm |
| Heavy Metals | NMT 10ppm |
| Arsenic | NMT 2ppm |
| Mercury | NMT 1ppm |