1-nitroguanidine

Vapour pressure

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

vapour pressure

Type of information:

other: Data base assessment source

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Qualifier:

equivalent or similar to guideline

Guideline:

other: not reported

Principles of method if other than guideline:

Collection of data

Type of method:

other: Collection of data

Specific details on test material used for the study:

Test stubstance supplied Sunflower AAP

Remarks on result:

not measured/tested

In the reference cited in the study report:

Encyclopedia of Explosives and Related Items. PATR2700 VOl.6. Picatinny Arsenal, Dover, NJ (1974)

it is stated that the vapor pressure (mmHg) is extremely low.

Conclusions:

The vapour pressure of nitroguanidine is stated to be extremely low.

Executive summary:

According to handbook data that the vapour pressure of nitroguanidine is extremely low.

Reference 2

Endpoint:

vapour pressure

Type of information:

calculation (if not (Q)SAR)

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Justification for type of information:

Calculation model and data base not mentioned in the handbook

Principles of method if other than guideline:

not mentioned: handbook data

GLP compliance:

not specified

Type of method:

other: Handbook data

Specific details on test material used for the study:

Test stubstance supplier not mentioned.

Key result

Temp.:

20 °C

Vapour pressure:

0 Pa

Remarks on result:

other: Result is derived using the Clausius-Clapeyron equation

The basis information is derived from Rosenblatt et al. (1991) reporting a value of 1.43 x 10pot-11 torr at 25 °C.

The Clausius-Clapeyron vapour pressure equation is used with:

log P(torr) = 14.15 - 7452/T

where P is the vapour pressure and T the temperature of the system (K). At 20 °C the Clausius-Clapeyron equation yields avapour pressure of 4.86 x 10pot-12 torr which is equivalent to the result presented of 6.46 x 10pot-10 Pa.

Conclusions:

The vapour pressure of nitroguanidine is estimated to be 0.000000000646 Pa according to th Clausius-Clapeyron equation.

Executive summary:

The vapour pressure is estimated to be 0.000000000646 Pa according to the Clausius-Clapeyron equation. This data is calculated on the basis of the a vapour pressure value of 1.43 x 10pot-11 torr at 25°C stated in Rosenblatt et al. (1991).

Description of key information

There are two information sources available for the weight of evidence of vapour pressure (handbook and collection of data).

Both conclude that the vapour pressure is extremely low (near zero).

Key value for chemical safety assessment

Vapour pressure:

0 Pa

at the temperature of:

20 °C

Additional information

There are two information sources available for the weight of evidence of vapour pressure (handbook and collection of data). In one study, the value for vapour pressure is calculated on the basis of a value stated in a publication, which was given in a different unit (torr) and reference Temperature (25 °C). The vapour pressure is calculated using the Clausius-Clapeyron equation to be 6.46 x 10^-10 Pa at 20 °C.

Another handbook states the vapour pressure to be extremely low.

Both statements are in line representing the same conclusion.

It is therefore concluded that the vapour pressure is extremely low with an absolute value near zero at a temperature of 20 °C.