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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

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