Alcohols, C16-18

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Justification for type of information:

Alcohols, C16-18 is a member and is from Long Chain Alcohols (C6-22 primary aliphatic alcohols) category.
The Long Chain Alcohols (C6-22 primary aliphatic alcohols) category is considered suitable as a source of data for Alcohols, C16-18.
Considered valid for read-across for purposes of classification.
No further vertebrate testing can be justified.

Long Chain Alcohols (C6-22 primary aliphatic alcohols) category covers a family of 30 primary aliphatic alcohols within a carbon chain length range of C6-C22. Commercial products generally include several aliphatic alcohol components, with a range of carbon chain lengths present. The family consists of alcohols with varying compositions and structures. Composition depends on the route to manufacture and the related feedstocks. Most of the alcohols have linear carbon chains but certain manufacturing processes create branched structures. Data are also available for eleven other similar substances, which support the category. Non-sponsored alcohols may not be HPV or may not be produced by members of the consortium, but have structures similar to sponsored linear alcohols.

Key points are that the members share:
• The same structural features
• Similar metabolic pathways
• Common mode of ecotoxicological action
• Common levels and mode of human health related effects.

Reason / purpose for cross-reference:

read-across source

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.5 (Surface Tension)

Principles of method if other than guideline:

Equilibrium surface tension was measured using the Wilhelmy Plate Technique.

GLP compliance:

not specified

Type of method:

plate method

Surface tension:

66.53 mN/m

Temp.:

25 °C

Conc.:

0.101 other: mg/m2

Remarks on result:

other: 66.53 dyne/centimeter (dyne/cm ) = 66.53 millinewnon/meter (mN/m). Water solubility of Oleyl Alcohol: 0.042mg/L. In the study oleyl alcohol is assumed to be "insoluble". Concentrations are reported as surface concentrations only.

The results in full are shown in Table 1.

Table 1 - Oleyl alcohol surface tension results

	Concentration (mg.m-2)
Temperature (deg C)	0.0265	0.0398	0.053	0.101
	Oleyl Alcohol surface tension mN.m-1
15		69.31	68.56
16	70.64	69.2	64.41	67.67
17	7047	69.03	68.24	67.57
18	70.29	68.84	68.06	67.41
19	70.13	68.66	61.89	67.26
20	69.96	68.47	67.81	67.12
21	69.77	68.28	67.65	66.94
22	69.58	68.09	67.44	66.78
23	69.43	67.92	67.33	66.66
24	69.27	67.75	67.17	66.59
25	69.13	67.73	67.04	66.53
26	69.02	67.68	67.01	66.47
27	38.98	67.69	67.11	66.39
28	68.93	67.67	67.15	66.39
29	68.91	67.61	67.17	66.36
30	68.91	67.66	67.31	66.42
31	68.9	67.62	67.34	66.44
32	68.95		67.26	66.51
33				66.57

 

Conclusions:

A surface tension value of 66.5 mN/m at a concentration at the surface of 0.101 mg/m2 was determined at 25ºC in a reliable study conducted according to generally accepted scientific principles.

Description of key information

A surface tension value of 66.5 mN/m at a concentration at the surface of 0.101 mg/m2 was determined at 25ºC in a reliable study conducted according to generally accepted scientific principles.

Key value for chemical safety assessment

Surface tension:

66.5

Additional information

A surface tension value of 66.5 mN/m at a concentration at the surface of 0.101 mg/m2 was determined at 25ºC in a reliable study conducted according to generally accepted scientific principles.