cis-1,2,3,6-Tetrahydrophthalic anhydride
cis-1,2,3,6-Tetrahydrophthalic anhydride
CAS: 85-43-8;935-79-5;2426-02-0
Molecular Formula: C8H8O3
cis-1,2,3,6-Tetrahydrophthalic anhydride - Names and Identifiers
cis-1,2,3,6-Tetrahydrophthalic anhydride - Physico-chemical Properties
| Molecular Formula | C8H8O3 |
| Molar Mass | 152.15 |
| Density | 1,375 g/cm3 |
| Melting Point | 101-102°C |
| Boling Point | 195°C 5mm |
| Flash Point | 157°C |
| Water Solubility | 29.4g/L at 20℃ |
| Vapor Presure | 0.021Pa at 20℃ |
| pKa | 3.84[at 20 ℃] |
| Storage Condition | Store below +30°C. |
| Refractive Index | 1.4810 (estimate) |
| Physical and Chemical Properties | This product is a white crystal, m.p.103 ~ 104 ℃, soluble in general solvents, slightly soluble in petroleum ether. |
cis-1,2,3,6-Tetrahydrophthalic anhydride - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R41 - Risk of serious damage to eyes R42/43 - May cause sensitization by inhalation and skin contact. R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
| UN IDs | 2698 |
| Hazard Class | 8 |
| Packing Group | III |
cis-1,2,3,6-Tetrahydrophthalic anhydride - Nature
Open Data Verified Data
white crystalline powder, flammable. Melting point 103-104 °c (cis-isomer). The relative density was 1. 20. Flash point (Open Cup) 157 °c. Slightly soluble in petroleum ether and ether, soluble in ethanol, acetone, chloroform, benzene.
Last Update：2024-01-02 23:10:35
cis-1,2,3,6-Tetrahydrophthalic anhydride - Preparation Method
Open Data Verified Data
The molten maleic anhydride and the refined mixed C4 fraction (in which the substance involved in the reaction is mainly butadiene) are reacted in the presence of benzene solvent to obtain tetrahydrophthalic anhydride, the reaction solution was then suction-filtered and dried to obtain a finished product.
Last Update：2022-01-01 10:43:58
cis-1,2,3,6-Tetrahydrophthalic anhydride - Use
Open Data Verified Data
organic synthesis intermediates, can be prepared from pesticide dimula, clindan, etc., can also be prepared plasticizers, epoxy resin curing agent, unsaturated polyester resin, solvent-free paint and adhesives.
Last Update：2022-01-01 10:43:58
cis-1,2,3,6-Tetrahydrophthalic anhydride - Safety
Open Data Verified Data
- This product has low toxicity. Contact with water to produce acid, corrosive. When in contact with the skin, it should be washed with soap and water immediately. Rat oral LD50 4590mg/kg, mice intraperitoneal injection of LDs0 500mg/kg. See also phthalic anhydride.
- It is packed in a metal drum lined with a plastic bag, 50kg per barrel. Store in a cool and ventilated place to prevent moisture. According to the provisions of flammable chemicals storage and transport, avoid open fire.
Last Update：2022-01-01 10:43:59
cis-1,2,3,6-Tetrahydrophthalic anhydride - Reference Information
| LogP | 1.29 at 40℃ |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | 1,2,3, 6-tetrahydrophthalic anhydride, it is an intermediate for the preparation of insecticide and fungicide, and can also be used for the preparation of alkyd resin, unsaturated polyester resin, plasticizer and curing agent. |
| production method | the preparation method is to add maleic anhydride in the reactor for heating and melting, and then slowly feed butadiene at about 100 ℃, A certain amount of butadiene is introduced, intermediate control is carried out, the reaction is finished, and the product is obtained by cooling and crystallization. In the above-mentioned reaction, the reaction may be performed with a solvent in some cases, but a desolvation treatment is required in the post-treatment, and a final post-treatment may be performed to obtain a finished product by distillation under reduced pressure. |
| category | corrosive article |
| toxicity grade | poisoning |
| Acute toxicity | abdominal injection-mouse LDL0: 500 mg/kg |
| stimulation data | Skin-rabbits 500 mg/24 h mild; eye-rabbit 20 mg/24 h moderate |
| flammability hazard characteristics | flammability |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; Stored separately from oxidants and amines |
| fire extinguishing agent | carbon dioxide, foam, dry powder |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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