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Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study
Remarks:
acceptable study, meets basic scientific principles

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1991
Report date:
1991

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
no
Type of method:
dynamic method
Remarks:
with argon

Test material

Constituent 1
Chemical structure
Reference substance name:
Sodium sarcosinate
EC Number:
224-338-5
EC Name:
Sodium sarcosinate
Cas Number:
4316-73-8
Molecular formula:
C3H6NNaO2
IUPAC Name:
sodium (methylamino)acetate
Test material form:
liquid
Details on test material:
Name of test material (as cited in study report):N-methylglycine sodium salt (35 - 40%) in water ("Sodium Sarcosinate Sol.")

Results and discussion

Vapour pressureopen allclose all
Key result
Temp.:
20 °C
Vapour pressure:
12.62 hPa
Remarks on result:
other: calculated from the regression equation
Temp.:
30 °C
Vapour pressure:
23.61 hPa
Temp.:
40 °C
Vapour pressure:
42.1 hPa
Temp.:
50 °C
Vapour pressure:
71.99 hPa
Vapour pressure at 50°C (if relevant for classification of gas under pressure)
Key result
Vapour pressure:
71.99 hPa

Any other information on results incl. tables

Temperature [°C]

Vapour Pressure [hPa]

Abberation [%]

 

Measurement

Calculation

 

27.7

20.00

20.53

-2.58

33.7

30.00

29.39

2.06

42.8

50.00

49.12

1.79

49.2

70.00

69.07

1.35

56.2

100.0

98.49

1.53

72.3

200.0

209.1

-4.33

80.7

300.0

300.0

0.00

94.1

500.0

513.2

-2.56

102.1

700.0

692.3

1.11

111.9

1000.0

979.9

2.05

112.87

---

1013.25

---

 

The regression of the results leads with a mean deviation of 1.94%to

the following equation:

In(p/hPa) = 11.5590 – 3895.50/ (224.52 +T/°C)

The vapour pressure at 20 °C was calculated from the regression equation.

The normal boiling temperature was obtained by intrapolation/extrapolation from the vapour pressure curve.

Applicant's summary and conclusion