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Physical & Chemical properties

Vapour pressure

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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).