Phthalic anhydride
Molecular formula:C8H4O3
Molecular weight:148.12
Quality standard:(GB/T15336-94)
| Name | Indicators | ||
| Excellent | First class | Qualified | |
| Appearance | White flake or crystalline powder | The other shades of white microstrip flake or crystalline powder | |
| Melt chroma(Pt - Co)≤ | 20 | 50 | 100 |
| Thermal stability chroma（Platinum - Cobalt）≤ | 50 | 150 | -- |
| Crystallization point℃ ≥ | 130.5 | 130.3 | 130.0 |
| Purity% ≥ | 99.5 | 99.5 | 99.0 |
| Free acid content ≤ | 0.5 | 0.5 | 0.5 |
| Ash % ≤ | 0.05 | -- | -- |
The main physical and chemical properties:White flaky crystalline powder, melting point 130.5℃, Solid Ratio (4℃): 1.527 insoluble in water and ether, with a general organic acid anhydride Chemical properties.
Use:This product is mainly used in the production of phthalate plasticizers can also be used for unsaturated polyester resins - alkyd resins, saccharin, plastics, paints, dyes and pharmaceutical industries.
Packaging:25kg, 50kg packaging polypropylene woven bag lined with PVC
