Hydroxylammonium chloride

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

09 Mar - 11 Mar 2016

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:

no

Type of method:

effusion method: Knudsen cell

Specific details on test material used for the study:

Storage conditions: ambient temperature (10 – 30 °C), dry

Temp.:

ca. 50 °C

Vapour pressure:

ca. 0.001 hPa

Temp.:

ca. 25 °C

Vapour pressure:

ca. 0 hPa

Temp.:

ca. 20 °C

Vapour pressure:

ca. 0 hPa

Results
Vapour pressure was measured in the range of 30 to 60 °C.
Table 1 – Measured vapour pressures and corresponding temperatures

Temperature [°C]	Vapour pressure [hPa]
30	6.6E-05
35	1.1E-04
40	1.9E-04
45	3.3E-04
50	5.4E-04
55	8.8E-04
60	1.4E-03

 

The vapour pressure values for 20, 25 and 50 °C were calculated using the Antoine equation and the constants shown below.
A = 10.56675
B = -4471.82
C = 273.15

Table 2 – Vapour pressure values extrapolated from experimental data

T [°C]	p [hPa]	p [Pa]
20	2.1E-05	2.1E-03
25	3.7E-05	3.7E-03
50	5.4E-04	5.4E-02

Description of key information

2.1E-05 hPa at 20 °C
3.7E-05 hPa at 25 °C

5.4E-04 hPa at 50 °C

(OECD 104, estimated using Antoine equation)

Key value for chemical safety assessment

Vapour pressure:

0.002 Pa

at the temperature of:

20 °C

Additional information

The vapour pressure values for the test item were extrapolated from the experimental data.