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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
27 July 2016 to 26 September 2016.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
yes
Remarks:
The study was conducted in compliance with the OECD Principles of GLP (1998).
Type of method:
effusion method: isothermal thermogravimetry
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: Lot No. 4145Y1016
- Expiration date of the lot/batch: October 16, 2017
- Purity test date: 2016-02-29

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material:
As per the instruction received from the Sponsor on storage of the test item, the test item was stored:
Storage Temperature : Ambient
Storage Container : In original container as supplied by the Sponsor
Storage Location : Test Item Control Office, JRF
Test no.:
#1
Temp.:
25 °C
Vapour pressure:
0.009 Pa
Remarks on result:
other: -2.06
Remarks:
log10 [Vp (Pa)]
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0.009 Pa
Remarks on result:
other: -2.05
Remarks:
log10 [Vp (Pa)]
Test no.:
#3
Temp.:
25 °C
Vapour pressure:
0.009 Pa
Remarks on result:
other: -2.06
Remarks:
log10 [Vp (Pa)]
Key result
Test no.:
#4
Temp.:
25 °C
Vapour pressure:
0.009 Pa
Remarks on result:
other: -2.06
Remarks:
mean log10 [Vp (Pa)]

Table 1. Calculation of Vapour Pressure (Replication I)

Temperature (°С) Temperature (K) Reciprocal of Temperature (1/K) Mass (mg) of Test Item Mass Difference (mg) Mass Difference (kg)

δm

 Vapour Pressure (Pa) Vp Log10
Vp (Pa)		 Log10
[Vp(Pa)] at 25 °С
33.94 307.09 0.003256374 24.1529 - - - -  
34.94 308.09 0.003245805 24.1376 0.0153 0.0000000153 0.047814936 -1.32  
35.94 309.09 0.003235304 24.1240 0.0289 0.0000000289 0.090317102 -1.04  
36.94 310.09 0.003224870 24.1110 0.0419 0.0000000419 0.130944172 -0.88  
37.94 311.09 0.003214504 24.0991 0.0538 0.0000000538 0.168133567 -0.77  
38.94 312.09 0.003204204 24.0882 0.0647 0.0000000647 0.202197803 -0.69 -2.06
39.94 313.09 0.003193970 24.0778 0.0751 0.0000000751 0.234699459 -0.63  
40.94 314.09 0.003183801 24.0668 0.0861 0.0000000861 0.269076210 -0.57  
41.94 315.09 0.003173696 24.0559 0.0970 0.0000000970 0.303140446 -0.52  
42.94 316.09 0.003163656 24.0453 0.1076 0.0000001076 0.336267134 -0.47  
43.94 317.09 0.003153679 24.0349 0.1180 0.0000001180 0.368768790 -0.43  

Table 2. Calculation of Vapour Pressure (Replication II)

Temperature (°С) Temperature (K) Reciprocal of Temperature (1/K) Mass (mg) of Test Item Mass Difference (mg) Mass Difference (kg)  

δm

 Vapour Pressure (Pa) Vp Log10
Vp (Pa)		 Log10
[Vp(Pa)] at 25 °С
33.97 307.12 0.003256056 28.2252 - - - -  
34.97 308.12 0.003245489 28.2087 0.0165 0.0000000165 0.051565127 -1.29  
35.97 309.12 0.003234990 28.1952 0.0300 0.0000000300 0.093754777 -1.03  
36.97 310.12 0.003224558 28.1817 0.0435 0.0000000435 0.135944427 -0.87  
37.97 311.12 0.003214194 28.1694 0.0558 0.0000000558 0.174383885 -0.76  
38.97 312.12 0.003203896 28.1575 0.0677 0.0000000677 0.211573280 -0.67 -2.05
39.97 313.12 0.003193664 28.1459 0.0793 0.0000000793 0.247825127 -0.61  
40.97 314.12 0.003183497 28.1348 0.0904 0.0000000904 0.282514395 -0.55  
41.97 315.12 0.003173394 28.1238 0.1014 0.0000001014 0.316891146 -0.50  
42.97 316.12 0.003163356 28.1128 0.1124 0.0000001124 0.351267898 -0.45  
43.97 317.12 0.003153380 28.1016 0.1236 0.0000001236 0.386269682 -0.41  

Table 3. Calculation of Vapour Pressure (Replication II)

Temperature (°С) Temperature (K) Reciprocal of Temperature (1/K) Mass (mg) of Test Item Mass Difference (mg) Mass Difference (kg) 

δm

 Vapour Pressure (Pa) Vp Log10
Vp (Pa)		 Log10
[Vp(Pa)] at 25 °С
33.83 306.98 0.003257541 23.0189 - - - -  
34.83 307.98 0.003246964 23.0046 0.0143 0.0000000143 0.044689777 -1.35  
35.83 308.98 0.003236455 22.9940 0.0249 0.0000000249 0.077816465 -1.11  
36.83 309.98 0.003226015 22.9846 0.0343 0.0000000343 0.107192962 -0.97  
37.83 310.98 0.003215641 22.9756 0.0433 0.0000000433 0.135319395 -0.87  
38.83 311.98 0.003205334 22.9667 0.0522 0.0000000522 0.163133312 -0.79 -2.06
39.83 312.98 0.003195092 22.9582 0.0607 0.0000000607 0.189697166 -0.72  
40.83 313.98 0.003184916 22.9496 0.0693 0.0000000693 0.216573535 -0.66  
41.83 314.98 0.003174805 22.9413 0.0776 0.0000000776 0.242512357 -0.62  
42.83 315.98 0.003164757 22.9335 0.0854 0.0000000854 0.266888599 -0.57  
43.83 316.98 0.003154773 22.9247 0.0942 0.0000000942 0.294390000 -0.53  

Replication Log10Vp (Pa) at 25 °С Vapour Pressure (Antilog)
I -2.06 8.71 x 10-3
II -2.05 8.91 x 10-3
III -2.06 8.71 x 10-3
Mean -2.06 8.78 x 10-3
Conclusions:
The vapour pressure of Dabquel Complex Mg P at 25 °С was 8.78 x 10-3 Pa.
Executive summary:

The study was conducted to determine the vapour pressure of DABQUEL COMPLEX Mg P by the effusion method using thermogravimetric analyzer. The study was conducted in compliance with OECD test guideline 104 and the OECD principles of GLP (1998). The Log10 [Vp(Pa)] of Dabquel Complex Mg P for replications I, II and III was -2.06, -2.05 and -2.06, respectively. The mean LogI0 [Vp(Pa)] was -2.06. The vapour pressure of Dabquel Complex Mg P at 25 °С was 8.71 x 10E-3 Pa, 8.91 x 10E-3 and 8.71 x 10E-3 for replications I, II and III, respectively. The mean vapour pressure of Dabquel Complex Mg P at 25 °С was 8.78 x 10E-3 Pa.

Description of key information

The vapour pressure of Dabquel Complex Mg P was determined by the effusion method using thermogravimetric analyzer (OECD 104; GLP). The mean vapour pressure of Dabquel Complex Mg P at 25 °C was 8.78 x 10E-3.

Key value for chemical safety assessment

Vapour pressure:
0.009 Pa
at the temperature of:
25 °C

Additional information