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Sebacic acid (Decanedioic acid or 1,8-octanedioic acid) is a straight-chain saturated aliphatic dicarboxylic acid with the molecular formula C10H18O4 and a molecular weight of 202.25. It forms needle-like crystals with a faint fatty acid odor and a slightly acidic taste. Decanedioic acid is chemically stable; its dicarboxylic acid structure allows it to undergo esterification, salt formation, and polycondensation reactions, making it a key fine organic intermediate.
| Item | Specification |
| Melting Point | 134–134.4°C |
| Boiling Point | 294.5°C/100 mmHg (lit.) |
| Density | 1.21 g/cm³ (25°C) |
| Flash Point | 220°C |
| Vapor Pressure | 1.24E-06 mmHg at 25°C |
| Refractive index | 1.422 (134°C) |
| Solubility | Solubility in water at 20°C is 1 g/L, and at 100°C is 17 g/L; readily soluble in ethanol, diethyl ether, and acetone; sparingly soluble in benzene and petroleum ether. |
| PKa | 4.720 |
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