Square acid, scientific name 3, 4-dihydroxy-3-cyclobutene-1, 2-dione, is a cyclobutene derivative.
| Name | 3,4-Dihydroxy-3-cyclobutene-1,2-dione | EINECS | 220-761-4 |
| CAS No. | 2892-51-5 | Density | 2.415 g/cm3 |
| PSA | 74.60000 | LogP | -0.53420 |
| Solubility | water: 20 g/L (30 °C) | Melting Point | >300 °C(lit.)
|
| Formula | C4H2O4 | Boiling Point | 250.963 °C at 760 mmHg |
| Molecular Weight | 114.057 | Flash Point | 119.84 °C |
| Transport Information | N/A | Appearance | White powder |
Appearance and character: strong acid, pKl=1.5; pK2=3.5. Produces dark purple with aqueous ferric chloride. It can be oxidized by bromine and potassium permanganate and does not react with phenylhydrazine. Similar in nature to carboxylic acid, it can form salts with bases, esters, acyl chloride, amides and mixed acid anhydrides.
Solubility in water :20 G/L (30°C).
Melting point :300 °C
Flash point :190 °C
Melting point: >300 °C(lit.)
Flash point: 190 °C
Water solubility: 20 g/L (30 ºC)
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