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Physical & Chemical properties

Vapour pressure

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Description of key information

Vapour pressure at 20°C: 0.00000000033 Pa (Read across from structural homologue "[938-147-6] Fatty acid chlorides, C8-14 (even numbered), reaction products with glycine ")

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
20 °C

Additional information

The vapour pressure of the structural homologue was determined according to the European Commission Regulation (EC) No. 440/2008, Part A: Methods for the determination of physico-chemical properties A.4. Vapour pressure (effusion method) and OECD test guideline OECD 104 (Vapour pressure).

The composition of the source material [938-147-6] Fatty acid chlorides, C8-14 (even numbered), reaction products with glycine only slightly deviates from the target material with regard to the C-chain distribution:

C-chain distribution of N-Alkanoyl glycin sodium constituents of the UVCB substances (normalised to 100%), melting ranges, boiling and physical state:

  Source material (Glycine, N-coco acyl derivs., sodium salts) Target Material
 C8  4 -12 %  3 -14%
 C10  5 -12 %  4 -10%
 C12  55 -68 %  75 - 90%
 C14  14 -24%  -
 C16  < 8%  -
 melting range  141 -190°C  143 -174°C
 boiling behaviour  decomposition before boiling at 260°C  decomposition before boiling at 290°C
 phys. state  white crystalline solid  white crystalline solid

Compared to the source material the content of the main C-homologue (C12) of the target material is increased, whereas longer C-chain lengths are not present in the target material. All other constituents are identical and are present at comparable concentrations. The melting ranges and boiling behaviour of both substances are comparable. Therefore, it is reasonable to conclude that the vapour pressures of source and target materials are in the same order of magnitude.