Hexafluoropropene, oxidized, oligomers, reduced, fluorinated

Viscosity

Link to relevant study record(s)

Reference

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2012

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

other: ASTM D445 "Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)"

Deviations:

no

GLP compliance:

no

Type of method:

capillary viscometer (static)

Key result

Temp.:

20°C

Parameter:

kinematic viscosity (in mm²/s)

Value:

> 0.45 - < 0.55

Temp.:

40°C

Parameter:

kinematic viscosity (in mm²/s)

Value:

> 0.35 - < 0.42

Key result

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

> 0.748 - < 0.931

Remarks on result:

other: calculated

Kinematic viscosity was determined on six different batches of Galden Low Molecular Weight both at 20 and 40°C. The obtained results are summarized in the following table:

Grade	Batch No.	Kinematic viscosity at 20°C ( mm2/s )	Kinematic viscosity at 40°C ( mm2/s )
HT55	1314SP	0.45	0.35
HT55	1631SP	0.45	0.35
HT55	1806SP	0.46	0.35
HT70	1021RR	0.55	0.42
HT70	3816OE	0.54	0.40
HT70	1531SP	0.54	0.41

The dynamic viscosity is obtained by multiplying the kinematic viscosity by the density of the liquid:

η = ν x ρ

η = dynamic viscosity

ν = kinematic viscosity ρ = density

Batch Number	Kinematic viscosity at 20°C ( mm2/s )	Density at 20 °C ( g/cm3 )	Dynamic viscosity at 20°C (mPa s )
1314SP	0,45	1,6623	0,74804
1631SP	0,45	1,6650	0,74925
1806SP	0,46	1,6653	0,76604
1021RR	0,55	1,6934	0,93137
3816OE	0,54	1,6875	0,91125
1531SP	0,54	1,6823	0,90844

Conclusions:

Galden Low Molecular Weight has a kinematic viscosity in the range between 0.45 and 0.55 cSt at 20°C and between 0.35 and 0.42 cSt at 40°C.
The calculated dynamic viscosity at 20°C is between 0.748 and 0.931 mPa s.

Executive summary:

The purpose of the measurements was to evaluate the kinematic viscosity of GALDEN LMW according to ASTM D445 method “Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)”.

According to the method, the kinematic viscosity is expressed as a measurement of the time for a fixed volume of the test item to flow by gravity through a capillary viscometer. The kinematic viscosity is determined from the measure flow time and the calibration constant of the viscometer.

The dynamic viscosity can be obtained by multiplying the kinematic viscosity by the density of the liquid.

Measurements were performed on six different batches of GALDEN LMW at 20 and 40°C.

The results obtained from measurements show that Galden LMW has a kinematic viscosity in the range between 0.45 and 0.55 cSt at 20°C and between 0.35 and 0.42 cSt at 40°C. The calculated dynamic viscosity is between 0.748 and 0.931 mPa s.

Description of key information

GALDEN LMW has a kinematic viscosity in the range between 0.45 and 0.55 cSt at 20°C.

Key value for chemical safety assessment

Viscosity:

0.84 mPa · s (dynamic)

at the temperature of:

20 °C

Additional information

A study of kinematic viscosity for GALDEN LMW is reported. The measurements were conducted on six different batches (3 batches of GALDEN HT55 and 3 batches of GALDEN HT70) according to ASTM method No. 445 “Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)”.

The results obtained from measurements show that Galden LMW has a kinematic viscosity in the range between 0.45 and 0.55 cSt at 20°C and between 0.35 and 0.42 cSt at 40°C. The calculated dynamic viscosity at 20 °C is between 0.748 and 0.931 mPa s (average value = 0.8395 mPas).