3,4-DIHYDROXY-3-CYCLOBUTENE-1,2-DIONE
3,4-Dihydroxy-3-cyclobutene-1,2-dione
CAS: 2892-51-5
Molecular Formula: C4H2O4
3,4-DIHYDROXY-3-CYCLOBUTENE-1,2-DIONE - Names and Identifiers
| Name | 3,4-Dihydroxy-3-cyclobutene-1,2-dione |
| Synonyms | NSC 624671 Squaric acid dihydroxy-cyclobutenedion dihydroxycyclobutenedione 4-hydroxycyclobutane-1,2,3-trione 1,2-Dihydroxycyclobutene-3,4-dione 3,4-DIHYDROXY-3-CYCLOBUTEN-1,2-DIONE 3,4-Dihydroxy-3-cyclobutene-1,2-dione 3,4-DIHYDROXY-3-CYCLOBUTENE-1,2-DIONE 3,4-DIHYDROXYCYCLOBUT-3-ENE-1,2-DIONE 3,4-dihydroxycyclobut-3-ene-1,2-dione 1,2-DIHYDROXY-3,4-CYCLOBUTENEDIONE FOR S 1-Cyclobutene-3,4-dione-1,2-diolSquaric Acid |
| CAS | 2892-51-5 |
| EINECS | 220-761-4 |
| InChI | InChI=1/C4H2O4/c5-1-2(6)4(8)3(1)7/h1,5H |
| InChIKey | PWEBUXCTKOWPCW-UHFFFAOYSA-N |
3,4-DIHYDROXY-3-CYCLOBUTENE-1,2-DIONE - Physico-chemical Properties
| Molecular Formula | C4H2O4 |
| Molar Mass | 114.06 |
| Density | 1.82 g/cm3 |
| Melting Point | >300°C(lit.) |
| Boling Point | 250.96°C |
| Flash Point | 190 °C |
| Water Solubility | 20 g/L (30 ºC) |
| Solubility | 20g/l |
| Vapor Presure | 0.000117mmHg at 25°C |
| Appearance | White powder |
| Color | White to beige |
| Merck | 14,8769 |
| BRN | 774275 |
| pKa | 1.5??(at 25℃) |
| PH | 1 (1g/l, H2O, 20℃) |
| Storage Condition | Inert atmosphere,Room Temperature |
| Refractive Index | 1.5800 (estimate) |
| MDL | MFCD00001334 |
3,4-DIHYDROXY-3-CYCLOBUTENE-1,2-DIONE - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R43 - May cause sensitization by 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 |
| UN IDs | 3261 |
| WGK Germany | 3 |
| RTECS | GU1800000 |
| TSCA | Yes |
| HS Code | 29144090 |
| Hazard Note | Irritant |
| Hazard Class | 8 |
| Packing Group | II |
3,4-DIHYDROXY-3-CYCLOBUTENE-1,2-DIONE - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Use | Used as an acylation reagent to carry out acylation reaction with an electrorich activated aromatic ring; React with active double bonds and active methyl groups to generate new compounds with special properties; used to synthesize photoconductive square acid and square acid dyes; treated with oxalyl chloride to generate dichlorocyclobutene dione can be used as an acylation reagent, acylation reaction with electrorich activated aromatic ring. Reacts with active double bonds and active methyl groups to form new compounds with special properties. Used as an intermediate for the synthesis of organic photoconductors, liquid crystal display materials, laser writing recording materials and electrophotographic photoreceptor materials. |
Last Update：2024-04-09 15:16:49
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