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Vapour pressure

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Description of key information

Key study: Read-across from experimental data on the analogue CAS No. 68155-09-9. The vapour pressure is less than 3.3 x 10-4 Pa at 25 ºC.

Key value for chemical safety assessment

Additional information

Key study: Read-across from experimental data on the analogue CAS No. 68155-09-9.

The analogue CAS No. 68155-09-9 which shares the same functional groups with the substance Amides, C12-C14 (even numbered), N-[3-(dimethylamino) propyl], N´-oxides, also has comparable values for the relevant molecular properties.

 

Cocamidopropylamine Oxide (CAS 68155-09-9) where R=C8-C18, is a tertiary amine oxide where RCO- represents the fatty acids from coconut oil. Coconut oil contains predominantly medium chain triglycerides with roughly 92% saturated fatty acids, 6% monounsaturated fatty acids, and 2% polyunsaturated fatty acids. Of the saturated fatty acids, coconut oil is primarily 44.6% lauric acid, 16.8% myristic acid, 8.2% palmitic acid, 8% caprylic acid, and other seven different saturated fatty acids in small amount. Its only monounsaturated fatty acid is oleic acid while its only polyunsaturated fatty acid is linoleic acid.

 

Therefore, the source chemical and the target chemical share the following functional groups:

a.- N-Oxide functionality

b.- Amide group

 

For the source substance, in the chemical structure, the R is substituted by C8-C18 and for the target substance the R is substituted by C12-C14.

 

Based on company experimental data (reported under the endpoint record Vapour pressure.001) on the analogue CAS No. 68155-09-9, the read-across approach is applied and the vapour pressure for the substance Amides, C12-14 (even numbered),
N-[3-(dimethylamino)propyl], N'-oxides is less than 3.3 x 10-4 Pa at 25 ºC.