Reaction mass of 7,7-dimethyl-2-methylidenebicyclo[2.2.1]heptane and (1R)-2,2-dimethyl-3-methylenebicyclo[2.2.1]heptane and (1S)-2,2-dimethyl-3-methylenebicyclo[2.2.1]heptane and (1S)-2,6,6-trimethylbicyclo[3.1.1]hept-2-ene

Viscosity

Link to relevant study record(s)

Reference

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

Study period:

04 January 2018 - 05 January 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Test method according to OECD Guideline 114 (OPPTS 830.7100). GLP study.

Qualifier:

according to guideline

Guideline:

OECD Test Guideline 114 (Viscosity of Liquids)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7100 (Viscosity)

Deviations:

no

Qualifier:

according to guideline

Guideline:

CIPAC MT 3 (Specific gravity, density and weight per millilitre)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

capillary viscometer (static)

Key result

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

1.68

Key result

Temp.:

40°C

Parameter:

dynamic viscosity (in mPa s)

Value:

1.2

Table 1: Density of Test Item and Ethylene Glycol at 20 ± 0.5 ºC

[A] Calibration of Specific Gravity bottle
Replication	Weight (g) of the Empty Pyknometer (x)	Weight (g) of the Pyknometer with Water (y)	Water Equivalence WE = (y – x)	Capacity (mL) of Pyknometer V20= 1.0018 (y - x)
1	20.0098	29.9814	9.9716	9.9895
2	19.8912	29.6000	9.7088	9.7263
3	19.9565	29.6399	9.6834	9.7008
[B] Density of Test Item
Replication	Weight (g) of the Empty Pyknometer (x)	Weight (g) of the Pyknometer with Test Item (y')	Weight (g) of Test Item (y' – x)		Density (DS)  g/mL
1	20.0098	28.5207	8.5109		0.8520
2	19.8912	28.2439	8.3527		0.8588
3	19.9565	28.3095	8.3530		0.8611
Mean					0.8573
Standard Deviation					0.0047
[C] Density of Ethylene Glycol
Replication	Weight (g) of the Empty Pyknometer (x)	Weight (g) of the Pyknometer with Ethylene Glycol (y')	Weight (g) of Ethylene Glycol (y' – x)		Density (DEG)  g/mL
1	20.0098	31.1333	11.1235		1.1135
2	19.8912	30.7308	10.8396		1.1145
3	19.9565	30.7659	10.8094		1.1143
Mean					1.1141
Standard Deviation					0.0005

Table 2: Density of Test Item and Ethylene Glycol at 40 ± 0.5 ºC

[A] Calibration of Specific Gravity bottle
Replication	Weight (g) of the Empty Pyknometer (x)	Weight (g) of the Pyknometer with Water (y)	Water Equivalence WE = (y – x)	Capacity (mL) of Pyknometer V40= [1.0018 (y - x) + 0.01]
1	21.0457	30.8467	9.8010	9.8286
2	18.3553	28.1331	9.7778	9.8054
3	19.0579	29.0710	10.0131	10.0411
[B] Density of Test Item
Replication	Weight (g) of the Empty Pyknometer (x)	Weight (g) of the Pyknometer with Test Item (y')	Weight (g) of Test Item (y' – x)		Density (DS)  g/mL
1	21.0457	29.4461	8.4004		0.8547
2	18.3553	26.7326	8.3773		0.8544
3	19.0579	27.6207	8.5628		0.8528
Mean					0.8540
Standard Deviation					0.0010
[C] Density of Ethylene Glycol
Replication	Weight (g) of the Empty Pyknometer (x)	Weight (g) of the Pyknometer with Ethylene Glycol (y')	Weight (g) of Ethylene Glycol (y' – x)		Density (DEG)  g/mL
1	21.0457	31.9285	10.8828		1.1073
2	18.3553	29.2240	10.8687		1.1084
3	19.0579	30.1664	11.1085		1.1063
Mean					1.1073
Standard Deviation					0.0011

Table 3: Calculation of Viscosity

Replication	Time Taken (in Seconds) by Ethylene Glycol to Flow from 'x' to 'y' [tEG] at		Time Taken (in Seconds) by Test Item to Flow from 'x' to 'y' [ts] at		Viscosity cP (mPa s) at
	20 ± 0.1 °C	40 ± 0.1 °C	20 ± 0.1 °C	40 ± 0.1 °C	20 ± 0.1 °C	40 ± 0.1 °C
1	2115	973	231	167	1.67	1.21
2	2114	972	234	166	1.70	1.20
3	2115	972	231	166	1.67	1.20
Mean					1.68	1.20
Standard Deviation					0.02	0.01

Conclusions:

The determined average viscosity of the test item was 1.68 ± 0.02 cP (mPa s) at 20°C and 1.20 ± 0.01 cP (mPa s) at 40ºC.

Executive summary:

The determination of viscosity of test item was performed according to OECD Guideline 114 using the capillary viscometer method (OPPTS 830.7100) for determination of flow time and capillary stoppered pyknometer method (CIPAC MT 3.2.1) for determination of density. The experiment was conducted in three replications at 20ºC and 40ºC. The determined average viscosity of the test item was 1.68 ± 0.02 cP (mPa s) at 20°C and 1.20 ± 0.01 cP (mPa s) at 40ºC.

Description of key information

Key study: OECD Guideline 114. GLP study: The determined average viscosity of the test item was 1.68 ± 0.02 cP (mPa s) at 20°C and 1.20 ± 0.01 cP (mPa s) at 40ºC. 

Key value for chemical safety assessment

Viscosity:

1.68 mPa · s (dynamic)

at the temperature of:

20 °C

Additional information

Key study: The determination of viscosity of test item was performed according to OECD Guideline 114 using the capillary viscometer method (OPPTS 830.7100) for determination of flow time and capillary stoppered pyknometer method (CIPAC MT 3.2.1) for determination of density. The experiment was conducted in three replications at 20ºC and 40ºC. The determined average viscosity of the test item was 1.68 ± 0.02 cP (mPa s) at 20°C and 1.20 ± 0.01 cP (mPa s) at 40ºC.