Ammonia, anhydrous

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Data are taken from a published handbook

Qualifier:

no guideline followed

Principles of method if other than guideline:

No further information is reported

GLP compliance:

no

Type of method:

other: not stated

Temp.:

20 °C

Vapour pressure:

8 611 hPa

The vapour pressure of ammonia, anhydrous is reported to be 8611 hPa at 20 °C

Conclusions:

The vapour pressure of ammonia, anhydrous is 8611 hPa at 20 °C

Executive summary:

The vapour pressure of ammonia, anhydrous is reported to be 8611 hPa at 20 °C

Description of key information

The vapour pressure of ammonia, anhydrous is reported to be 8611 hPa at 20 °C (Handbook of Compressed Gases).

Key value for chemical safety assessment

Vapour pressure:

8 611 hPa

at the temperature of:

293 K

Additional information

The vapour pressure of ammonia, anhydrous is reported to be 8611 hPa at 20 °C (Handbook of Compressed Gases; Lange's Handbook of Chemistry).

The vapour pressure of aqueous ammonia was determined to be 2160 mmHg at 25 °C (Daubert & Danner, 1989). The vapour pressure of a 30% ammonia solution (aqueous) is reported to be 118 torr at 20°C (Young, 2003). At a temperature of 19.9°C, the vapour pressure varies between 9.64 -41.69 kPa for a composition of 3.93 to 23.37%wt NH3 in solution (Perman, 1903).