Phthalaldehyde
Phthalaldehyde (sometimes also o-phthalaldehyde or ortho-phthalaldehyde, OPA) is the chemical compound with the formula C6H4(CHO)2. It is one of three isomers of benzene dicarbaldehyde, related to phthalic acid. This pale yellow solid is a building block in the synthesis of heterocyclic compounds and a reagent in the analysis of amino acids. OPA dissolves in water solution at pH < 11.5. Its solutions degrade upon UV illumination and exposure to air.
| Names | |
|---|---|
| IUPAC name
Phthalaldehyde | |
| Preferred IUPAC name
Benzene-1,2-dicarbaldehyde | |
| Other names
Benzene-1,2-dicarboxaldehyde o-Phthalaldehyde o-Phthalic dicarboxaldehyde Phthaldialdehyde | |
| Identifiers | |
3D model (JSmol) |
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| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.010.367 |
| EC Number |
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PubChem CID |
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| RTECS number |
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| UNII | |
| UN number | 2923 |
CompTox Dashboard (EPA) |
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| Properties | |
| C8H6O2 | |
| Molar mass | 134.134 g·mol−1 |
| Appearance | Yellow solid |
| Density | 1.19 g/mL |
| Melting point | 55.5–56 °C (131.9–132.8 °F; 328.6–329.1 K) |
| Boiling point | 266.1 °C (511.0 °F; 539.2 K) |
| Low | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards |
Toxic, Irritant |
| GHS labelling: | |
| Danger | |
| H228, H301, H314, H315, H317, H335, H373, H410 | |
| P210, P240, P241, P260, P261, P264, P270, P271, P272, P273, P280, P301+P310, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P314, P321, P330, P332+P313, P333+P313, P362, P363, P370+P378, P391, P403+P233, P405, P501 | |
| Flash point | 132 °C (270 °F; 405 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
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