Molecular Formula | C9H8O3 |
Molar Mass | 164.16 |
Density | 1.405±0.06 g/cm3(Predicted) |
Melting Point | 140-145°C(lit.) |
Boling Point | 331.1±42.0 °C(Predicted) |
Flash Point | 163.8°C |
Solubility | Chloroform |
Vapor Presure | 0.00016mmHg at 25°C |
Appearance | White white crystalline powder |
Color | White to Off-White |
Storage Condition | Inert atmosphere,2-8°C |
Refractive Index | 1.583 |
MDL | MFCD00630580 |
Risk Codes | R37/38 - Irritating to respiratory system and skin. R41 - Risk of serious damage to eyes R42/43 - May cause sensitization by inhalation and skin contact. |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S37/39 - Wear suitable gloves and eye/face protection S24 - Avoid contact with skin. S22 - Do not breathe dust. |
WGK Germany | 3 |
TSCA | Yes |
HS Code | 29189900 |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
Use | Cis-5-norbornene-outer -2, 3-dicarboxylic anhydride is also called exomethylene tetrahydrophthalic anhydride. Methylene tetrahydrophthalic anhydride is divided into inner and outer configurations, namely inner methylene tetrahydrophthalic anhydride and outer methylene tetrahydrophthalic anhydride. The two configurations have different Uses. Exomethylene tetrahydrophthalic anhydride is an important chemical raw material, which is widely used in electronics, synthetic resins, petroleum industry, pesticides and other fields. |
preparation | weigh 98g of maleic anhydride and 26g of dicyclopentadiene, place them in a reaction kettle, add 100mL of dichloromethane, seal, stir, and raise the temperature to 150 ℃. after the reaction is complete, the obtained reaction solution is cooled, crystallizated, separated and dried to obtain shun -5-norbornene-outer -2,3-dicarboxylic acid anhydride crude product 47.5g (yield 72.35%). Take 500g of crude product (chromatographic purity 68.12%), add 500ml of propanol, heat to 85±5 ℃, reflux until dissolved completely, stir, cool to room temperature, cool to -25±5 ℃ for 5-6h, filter, and collect crystals; Add 250ml of propanol to the above crystals, heat to 85±5 ℃, reflux until dissolved completely, stir, cool to room temperature, it is placed at -5±5 ℃ for cooling and crystallization for 2h ~ 3h, filtration, crystal collection and drying to obtain 335.52g of cis-5-norbornene-outer -2, 3-dicarboxylic acid anhydride, melting point: 142.0 ℃ ~ 142.5 ℃, yield 98.51% and purity 99.91%. |