1-methylpiperazine

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1986

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods with acceptable restrictions

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

GLP compliance:

no

Type of method:

dynamic method

Remarks:

under argon atmosphere

Key result

Test no.:

#1

Temp.:

19.73 °C

Vapour pressure:

6.67 hPa

Remarks on result:

other:

Key result

Test no.:

#2

Temp.:

24.99 °C

Vapour pressure:

9.33 hPa

The regression of the results leads with a mean deviation of 0.21 % to the following equation (range of measurement 6.58 - 136.67°C):

ln(p/hPa) = 9.4947 - 3200.55 / (200.89 + t/°C)

Conclusions:

The vapour pressure was determined to be 6.7 hPa at 20°C and 9.3 hPa at 25°C.

Description of key information

6.7 hPa at 20°C

9.3 hPa at 25°C

Key value for chemical safety assessment

Vapour pressure:

6.7 hPa

at the temperature of:

20 °C

Additional information

The determination was carried out by dynamic method under Argon atmosphere.