2,4,6-triisopropyl-m-phenylene diisocyanate

Viscosity

Link to relevant study record(s)

Reference

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

Study period:

12 OCT 2011 - 08 NOV 2011

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP-Study

Qualifier:

according to guideline

Guideline:

OECD Test Guideline 114 (Viscosity of Liquids)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

rotational viscometer (dynamic)

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

59.35

Remarks on result:

other: Standard deviation: 0.37 mPa s

Temp.:

40°C

Parameter:

dynamic viscosity (in mPa s)

Value:

19.82

Remarks on result:

other: Standard deviation: 0.05 mPa s

The evaluation and calculation of the results was executed automatically by the rheoplus software. The viscosities of each measuring point as well as the calculated results are summarized in the following table:

Temperature [°C]		20.00		40.00
Measuring Point	Shear Rate	Viscosity	Viscosity	Viscosity	Viscosity
	[1/s]	[mPa s]	[mPa s]	[mPa s]	[mPa s]
1	0.1	57.4	56.0	22.7	21.9
2	0.144	54.4	58.9	19.7	19.5
3	0.207	56.0	59.8	20.2	20.3
4	0.298	58.6	59.7	20.5	20.0
5	0.428	59.3	60.6	20.2	20.4
6	0.616	59.6	59.7	20.2	20.1
7	0.886	59.8	60.2	19.6	19.9
8	1.27	59.5	59.5	19.6	19.5
9	1.83	59.7	59.8	19.4	19.6
10	2.64	59.9	59.9	19.7	19.7
11	3.79	59.9	59.9	19.5	19.7
12	5.46	59.9	59.9	19.5	19.7
13	7.85	60.0	59.9	19.5	19.6
14	11.3	60.0	59.9	19.5	19.7
15	16.2	59.9	59.9	19.5	19.7
16	23.4	60.0	59.9	19.5	19.7
17	33.6	59.9	59.9	19.5	19.7
18	48.3	59.9	59.9	19.5	19.6
19	69.5	59.9	59.9	19.5	19.6
20	100	59.8	59.8	19.4	19.6
Average [mPa s]		59.090	59.614	19.783	19.857
Average [mPa s]		59.35		19.82
SD [mPa s]		0.371		0.052
RSD [%]		0.62		0.26

Conclusions:

- dynamic viscosity (at 20°C) = 59.35 ± 0.37 mPa s;
- dynamic viscosity (at 40°C) = 19.82 ± 0.05 mPa s

Executive summary:

The dynamic viscosity at 20 °C and at 40 °C of the substance was investigated in a GLP study according to OECD guideline 114 (2011) by using a cone/plate-rheometer. The dynamic viscosity has been determined to be 59.35 ± 0.37 mPa s at 20 °C and 19.82 ± 0.05 mPa s at 40 °C.

Description of key information

The dynamic viscosity at 20 °C and at 40 °C of the substance was investigated in a GLP study according to OECD guideline 114 (2011) by using a cone/plate-rheometer. The dynamic viscosity has been determined to be 59.35 ± 0.37 mPa s at 20 °C and 19.82 ± 0.05 mPa s at 40 °C.

Key value for chemical safety assessment

Viscosity:

59.35 mPa · s (dynamic)

at the temperature of:

20 °C

Additional information

The kinematic viscosity at 20 °C of the substance has been determined to be 59.09 mm²/s in a non-GLP supporting study (Blaul, 2012) according to ASTM D 7042 (which is equivalent to ISO 3104 / ASTM D445) with a rotational viscometer.

With the denisity (den) of the substance (1.0457 g/cm³) the kinematic viscosity (kin) is connected directly with the dynamic viscosity (dyn) via dyn = den x kin.

As a result the calculated dynamic viscosity from the measured density and kinematic viscosity is: 1.0457 g/cm³ x 59.09 mm²/s = 61.81 mP s. This is in the range of the measured key-value and supports the validity of the key study (Sonnenschein, 2011)