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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:
70 march 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
GLP compliance:
yes
Type of method:
effusion method: Knudsen cell
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: 1500000655
- Expiration date of the lot/batch: 13.03.2018
- Manufacturing date: 14.03.2015
Test no.:
#1
Temp.:
102.6 °C
Vapour pressure:
0.32 Pa
Remarks on result:
other: Evaporation rate : 4.44 microgram/min
Test no.:
#2
Temp.:
108.2 °C
Vapour pressure:
0.76 Pa
Remarks on result:
other: Evaporation rate : 10.60 microgram/min
Test no.:
#3
Temp.:
113.9 °C
Vapour pressure:
1.8 Pa
Remarks on result:
other: Evaporation rate : 25.00 microgram/min
Test no.:
#4
Temp.:
119.7 °C
Vapour pressure:
3.86 Pa
Remarks on result:
other: Evaporation rate :53.23 microgram/min

Vapour pressure of magnesium gluconate at 20°C and 25°C was calculated on the basis of equation:

log (p) = f (1/t) = a-b/(t+273.15)

a = 24.6051

b=9430.77

R2=0.9728

where:

p – vapour pressure in Pa,

t – temperature in °C,

obtained for four measurement points: 102.6°C, 108.2 °C, 113.9 °C and 119.7 °C

Conclusions:
The determined vapour pressure of test item is to be :
at 20 °C : 2.72.E-8 Pa
at 25 °C : 9.42.E-8 Pa
Executive summary:

The vapour pressure of test item is determinated to be 2.72.E-8 Pa and 9.42.E-8 Pa at 20 and 25°C respectively, calculated using Antoine equation and following the guideline OECD 104.

Description of key information

The vapour pressure of test item was determinated to be 2.72.E-8 Pa and 9.42.E-8 Pa at 20 and 25°C respectively, calculated using Antoine equation and following the guideline OECD 104.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
20 °C

Additional information