1,2,4,5-BenzenetetracarboxyL
1,2,4,5-Benzenetetracarboxylic acid
CAS: 89-05-4
Molecular Formula: C10H6O8
1,2,4,5-BenzenetetracarboxyL - Names and Identifiers
| Name | 1,2,4,5-Benzenetetracarboxylic acid |
| Synonyms | USAF xr-20 Pyrome1htic Acid Pyromellitic acid Pyromellitic acid hydrate 1,2,4,5-BenzenetetracarboxyL benzene-1,2,4,5-tetracarboxylate 1,2,4,5-Benzenetetracarboxylic acid benzene-1,2,4,5-tetracarboxylic acid 1,2,4,5-BENZENETETRACARBOXYLIC ACID FOR 1,2,4,5-Benzenetetracarboxylic acid,Pyromellitic acid |
| CAS | 89-05-4 |
| EINECS | 201-879-5 |
| InChI | InChI=1/C10H6O8/c11-7(12)3-1-4(8(13)14)6(10(17)18)2-5(3)9(15)16/h1-2H,(H,11,12)(H,13,14)(H,15,16)(H,17,18)/p-4 |
| InChIKey | CYIDZMCFTVVTJO-UHFFFAOYSA-N |
1,2,4,5-BenzenetetracarboxyL - Physico-chemical Properties
| Molecular Formula | C10H6O8 |
| Molar Mass | 254.15 |
| Density | 0,56 g/cm3 |
| Melting Point | 281-284.5°C(lit.) |
| Boling Point | 317.36°C (rough estimate) |
| Flash Point | 325 °C |
| Water Solubility | 1.5 g/100 mL (20 ºC) |
| Solubility | 0.1 M NaOH: 0.2M, clear, faintly yellow |
| Vapor Presure | 1.45E-14mmHg at 25°C |
| Appearance | White crystal |
| Color | White to very slightly yellow |
| Merck | 14,8004 |
| pKa | pK1: 1.92;pK2: 2.87;pK3: 4.49;pK4: 5.63 (25°C) |
| Storage Condition | Store below +30°C. |
| Stability | Stable. Incompatible with strong oxidizing agents, strong bases. |
| Refractive Index | 1.7010 (estimate) |
| MDL | MFCD00002471 |
| Physical and Chemical Properties | White to yellowish powdery crystals. Melting point 276 ° C (anhydrous),242 ° C (with 2 molecules of crystal water), the relative density of 1.79. Soluble in alcohol, slightly soluble in ether and water. Can sublimate. |
| Use | Used in the synthesis of polyimide, isophthalate octyl Ester, etc., is the main raw material for the production of extinction curing agent |
1,2,4,5-BenzenetetracarboxyL - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R36 - Irritating to the eyes |
| 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 S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| RTECS | DB9275000 |
| FLUKA BRAND F CODES | 34 |
| TSCA | Yes |
| HS Code | 29173980 |
1,2,4,5-BenzenetetracarboxyL - Reference Information
| LogP | 0.15 at 25℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | used in the synthesis of polyimide and octyl mesylate, is the main raw material for the production of extinction curing agent |
| production method | consists of 1,2,4, 5-tetramethylbenzene (or 5-isopropyl-1, 2, 4-trimethylbenzene) is obtained by oxidation, or by chloromethylation and oxidation of xylene. |
Last Update：2024-04-09 19:55:45
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