Registration Dossier
Registration Dossier
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EC number: 203-965-8 | CAS number: 112-38-9
Endpoint summary
Administrative data
Description of key information
Additional information
Undecylenic acid revealed no hazardous phys.-chem. properties, thus no classification.
| Endpoint | Result | Comments |
| Appearance | Solid | Undecylenic acid is a colourless (white) solid. |
| Melting point | 21.2-26.4 °C | Melting range is above 20 °C (usual room temperature), thus the substance is not prone to cause exposure to dust and small particles emissions |
| Boiling point | 286.05- 293.75°C | Relatively high boiling point suggests a generally low fugacity of the substance up to this temperature range |
| Density | 1.0024 | Equals more or less the density of water |
| Vapour pressure | 0.0192 Pa | Low vapour pressure, what generally suggests that the substance has low potential to cause significant inhalative exposure |
| Partition coefficient log Pow | 4.0 | Log Pow 4.0 is in accordance with the low solubility of the substance. |
| Water solubility | 38.46 mg/ l at pH 4.27 and 20°C (lesser solubility at neutral pH) | 38.46 mg/l at 20 °C (pH 4.27). Lower solubility in the neutral pH range indicated by another supporting study. Since the water solubility falls within the bracket 0.1 -100 mg/L, undecylenic acid is "slightly soluble". |
| Flash point | 158°C ± 1°C | Flash point at relatively high temperatures, no classification as highly flammable. |
| Flammability | Not highly flammable | Undecylenic acid is not highly flammable. |
| Adsorption coefficient log Koc | The adsorption coefficient of 10-UNDENECENOIC AClD was found to be log Koc = 2.84 (Koc = 691.83) ( OECD Guideline 121 Adsorption - HPLC) . This result is close to the log Koc 2.77 of reference substance acetanilid, which represents the lower end of adsorbability capacity of the reference substances used. Therefore it is concluded that undecylenic acid has low adsorptive capacity. |
|
Oxidising properties |
Not oxidising | Structural assessment indicates that the substance does not have oxidising properties. |
Explosive properties |
Not explosive | Structural assessment indicates that the substance does not have explosive properties. |
Dissociation constant |
Dissociating propreties. | Undecylenic acid has dissociating properties. However due to its low solubility in water, the acidity constant could not be determined for temperatures lower than 60°C. At 60°C the acidity constant of undecylenic acid is 4.85 (with ionic strentgh : 0.01 mol/L). |
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