| Appearance | slightly yellow liquid |
| Anhydride Content | ≥41.0% |
| Volatile Content | ≤1.0% |
| Free Acid | ≤1.0 % |
| Freezing Point | ≤-15℃ |
| Viscosity(25℃) | 30-50 mPa•S |
| Physical State(25℃) | Liquid |
| Appearance | slightly yellow liquid |
| Molecular Weight | 166.17 |
| Specifical Gravity(25/4℃) | 1.21 |
| Water Solubility | decomposes |
| Solvent Solubility | Slightly Soluble: petroleum ether Miscible: benzene, toluene, acetone, carbon tetrachloride, chloroform, ethanol, ethyl acetate |