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Squaric acid CAS:2892-51-5 Product introduction
Name: Squaric acid
CAS No:2892-51-5
EINECS No: 220-761-4
Molecular formula: C4H2O4
Molecular weight: 114.06
Density:1.82 g/cm3
Melting point: >300 °C(lit.)
Boiling point: 250.96°C
Squaric acid Characteristic:
Square acid has strongly acidic with pKl=1.5; pK2=3.5. Produces a deep purple color with aqueous ferric chloride solution. Square acid can be oxidized by bromine and potassium permanganate, and does not react with phenylhydrazine. Similar to carboxylic acid, Square acid can form salts with bases and produce esters, chlorides, amides and mixed anhydrides. Solubility in water: 20 G/L (30°C). Melting point:300 °C Flash point:190 °C
Squaric acid COA:
| Test Items | Test Results |
| Appearance | White crystal powder |
| Purity%≥ | 98 |
| Metal cation%≤ | 0.5 |
| Wa ter content %≤ | 1.2 |
Squaric acid Application:
1. Used as an acylation reagent for acylation reactions with electrically rich activated aromatic rings. Reacts with active double bonds and active methyl groups to produce new compounds with special properties.
2. Used as intermediates in the synthesis of organic photoconductors, liquid crystal display materials, laser writing and recording materials, and electrostatic photoreceptor materials.
3. Used in the synthesis of photoconductive square acidocyanine and square acid dyes
Squaric acid Package:
Package:25kg/bag, 50kg/drum
Squaric acid storage and transportation:
Sealed in a cool, dry environment
Related Products——Acetate:
| product name | CAS |
| Squaric acid | 2892-51-5 |
| 3,4-Dimethoxy-3-cyclobutene-1,2-dione | 5222-73-1 |
| Diethyl squarate | 5231-87-8 |
| Dibutyl squarate | 2892-62-8 |
| 3,4-Diisopropoxy-3-cyclobutene-1,2-dione | 61699-62-5 |
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