methylethylketone peroxide trimer

Viscosity

Link to relevant study record(s)

Reference

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

Study period:

December 2013

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Well conducted study according to OECD guideline under Internal management system, certificate of analysis included in the report.

Qualifier:

according to guideline

Guideline:

OECD Test Guideline 114 (Viscosity of Liquids)

Version / remarks:

Adopted May 12, 1981

Deviations:

no

GLP compliance:

no

Remarks:

Internal management system

Type of method:

rotational viscometer (dynamic)

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

4.7

Temp.:

other: 25.0°C

Parameter:

dynamic viscosity (in mPa s)

Value:

3.7

Temp.:

other: 30.0°C

Parameter:

dynamic viscosity (in mPa s)

Value:

3.2

The rheometer was calibrated at 13-12-2011.
A calibration check was performed prior to the measurement . The estimated accuracy is ± 1%.

Viscosity measurement of the REACH test substance

Table 1: measured viscosities at 5.0°C

Shear rate [1/s]	Viscosity [mPa.s]
	after 0 hour	after 1 hour	after 2 hours
1.32	3000	285
2.64		201	148
6.6		128	85.0
13.2		108	63.0
26.4		105	44.2
66			38.4

 

Table 2: measured viscosities at 10.0°C

Shear rate [1/s]	Viscosity [mPa.s]
	after 0 hour	after 1 hour	after 2 hours
6.6	280
13.2	145	42.6	38.7
26.4	83.2	30.9	28.6
66		23.3	21.5
132		21	19

 

Table 3: measured viscosities at 15.0°C

Shear rate [1/s]	Viscosity [mPa.s]
	after 0 hour	after 1 hour	after 2 hours
66	15.5	12.5	11.8
132	12.7	10.7	10.2

 

Table 4: measured viscosities at 20.0°C

Shear rate [1/s]	Viscosity [mPa.s]
	after 0 hour	after 1 hour	after 2 hours
66	4.7	4.7	4.6
132	4.8	4.6	4.6

 

 

Table 5: measured viscosities at 25.0°C

Shear rate [1/s]	Viscosity [mPa.s]
	after 0 hour	after 1 hour	after 2 hours
66	3.7	3.7	3.7
132	3.7	3.6	3.7

 

Table 6: measured viscosities at 30.0°C

Shear rate [1/s]	Viscosity [mPa.s]
	after 0 hour	after 1 hour	after 2 hours
66	3.2	3.2	3.2
132	3.2	3.2	3.2

 

Conclusions:

The viscosity of the test substance was determined according to OECD Guideline 114.
The viscosity of the test substance is 4.7 mPa.s at 20°C and 3.2 mPa.s at 30°C.

Below 20°C the test substance behaved like a non-Newtonian liquid (a pseudoplastic liquid), i.e. the viscosity decreased at higher shear rates. Next to that the viscosity was time dependent below 20°C.

The test substance behaved like a Newtonian liquid at and above 20°C, i.e. the viscosity was independent of the shear rate. Also the viscosity did not change in time.

Executive summary:

The viscosity of Trigonox 301 (CAS 26748 -23 -0) was determined according to OECD Guideline 114 , and in accordance with European Chemicals Agency (ECHA), Guidance on information requirements and chemical safety assessment, Chapter R.7a, Endpoint specific guidance, May 2008.

 

The viscosity of the test substance is 4.7 mPa.s at 50 rpm (20 oC)

 

Description of key information

The viscosity of the test substance was determined according to OECD Guideline 114 and is  4.7 mPa.s at 20°C and 3.2 mPa.s at 30°C.

Key value for chemical safety assessment

Viscosity:

4.7 mPa · s (dynamic)

at the temperature of:

20 °C