3,5,5-trimethylhexanoic acid

Viscosity

Link to relevant study record(s)

Reference

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

Study period:

January 2010

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Reason / purpose for cross-reference:

reference to other study

Qualifier:

equivalent or similar to guideline

Guideline:

other: DIN 51562 ASTM D 445

GLP compliance:

no

Other quality assurance:

other: DIN EN ISO 9001

Type of method:

capillary viscometer (static)

Key result

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

11.47

 Details on single measurements:

Temperature /°C	kin. Viscosity (1. Measurement) /mm²/s	kin. Viscosity (2. Measurement) /mm²/s
20	12.740	12.760
40	6.860	6.859

Accuracy < +/- 0.5%

The dynamic viscosity was calculated from the arithmetic mean of the kinematic viscosity (2 replicates) based on the density ( 0.8996 g/cm³) of the test item at 20°C:

11.470 mPa s.

Kinematic viscosity at 40°C (arithmetic mean of 2 replicates): 6.86 mm^2/s

Conclusions:

Dynamic viscosity: 11.47 mPa s (20 °C)

Executive summary:

Viscosity was determined using the capillary viscosimeter method (kinematic viscosity; ASTM D 445; mean of two determinations) at 20 °C and 40 °C:

12.75 mm^2/s at 20°C, corresponding to a dynamic viscosity of 11.47 mPa s.

6.86 mm^2/s at 40°C.

The laboratory complied with a quality management system according to DIN EN ISO 9001 : 2008.

Description of key information

Dynamic viscosity (ASTM D 445): 11.47 mPas at 20°C;
Kinematic viscosity (ASTM D 445): 6.86 mm^2/s at 40°C

Key value for chemical safety assessment

Viscosity:

11.47 mPa · s (dynamic)

at the temperature of:

20 °C

Additional information

Based on the kinematic viscosity of the test item at 40°C (arithmetic mean of 2 replicates) of 6.86 mm^2/s, for hydrocarbons a classification as Aspiration toxicity, Hazard Category 1 would be applicable according to REGULATION (EC) No 1272/2008 (CLP). However, the submission substance is invariably a carboxylic acid. Thus, classification criteria based on viscosity do not apply to the submission substance.

 

In conclusion, according to REGULATION (EC) No 1272/2008 (CLP) no classification requirements exist for the submission substance with regard to aspiration toxicity.