A mixture of: propan-2-one-O,O'(methoxyvinylsilandiyl)dioxime; propan-2-one-O-(dimethoxyvinylsilyl)oxime; propan-2-one-O,O',O''-(vinylsilantriyl)trioxime

Vapour pressure

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

February 22, 2005

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

According to OECD Guideline 104, with GLP.

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

GLP compliance:

yes

Type of method:

other: Isoteniscope and Vapour Balance Methods

Key result

Test no.:

#1

Remarks on result:

not determinable because of methodological limitations

Remarks:

(Vapour pressure balance: The instrument could no maintain the vacuum required to operate)

Key result

Test no.:

#2

Remarks on result:

not determinable

Remarks:

(Isoteniscope System: the sampled decomposed prior to obtaining suitable manometer readings)

Attempts were made to determine the vapor pressure using both, Vapour Pressure Balance and Isoteniscope System, procedures specified in EU Method A4 (Vapour Pressure).

Vapour pressure balance: The instrument could no maintain the vacuum required to operate.

Isoteniscope System: the sampled decomposed prior to obtaining suitable manometer readings.

Conclusions:

It was not possible to determine the vapour pressure using neither the vapour pressure balance nor isoteniscope method.

Executive summary:

It was not possible to determine the vapour pressure using neither the vapour pressure balance nor isoteniscope method.

Reference 2

Endpoint:

vapour pressure

Type of information:

(Q)SAR

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification

Remarks:

Internationally accepted method, EPI Suite, EPA (USA)

Justification for type of information:

See attached QSAR supporting information

Principles of method if other than guideline:

Calculation by atom/fragment contribution method using the software MPBPWIN Version v. 1.41 2000, of the U.S. Environmental Protection Agency

Specific details on test material used for the study:

SMILES of components:
acetone O,O'-[methoxy(vinyl)silanediyl]oxime (VMAC2): CC( C)= NO[Si] (/C([H])=C([H])\[H])( OC)O N =C( C)C
acetone O,O',O''-(vinylsilanetriyl)oxime (VAC3): CC( C)= NO[Si] (/C( [H] )=C([H] )\[H]) (0 N=C( C)C)O N=C( C )C
acetone O-[dimethoxy(vinyl)silyl]oxime (VM2AC): CC(C)=NO[Si](/C([H])=C([H])\[H]) (OC)OC

Temp.:

25 °C

Vapour pressure:

3.69 Pa

Remarks on result:

other: acetone O,O'-[methoxy(vinyl)silanediyl]oxime

Temp.:

25 °C

Vapour pressure:

0.251 Pa

Remarks on result:

other: acetone O,O',O''-(vinylsilanetriyl)oxime

Temp.:

25 °C

Vapour pressure:

80.7 Pa

Remarks on result:

other: acetone O-[dimethoxy(vinyl)silyl]oxime

The calculated vapour pressures of the three main components of the test substance at 25 ºC were: 3.69 Pa (acetoneO,O'-[methoxy(vinyl)silanediyl]oxime); 0.251 Pa (acetoneO,O',O''-(vinylsilanetriyl)oxime) and 80.7 Pa (acetoneO-[dimethoxy(vinyl)silyl]oxime).

Conclusions:

The calculated vapour pressures of the three main components of the test substance at 25 ºC were: 3.69 Pa (acetoneO,O'-[methoxy(vinyl)silanediyl]oxime); 0.251 Pa (acetoneO,O',O''-(vinylsilanetriyl)oxime) and 80.7 Pa (acetoneO-[dimethoxy(vinyl)silyl]oxime).

Executive summary:

Using the software MPBPWIN v.1.41 2000, of the U.S. Environmental Protection Agency the calculated vapour pressures of the three main components of the test substance at 25 ºC were: 3.69 Pa (acetoneO,O'-[methoxy(vinyl)silanediyl]oxime); 0.251 Pa (acetoneO,O',O''-(vinylsilanetriyl)oxime) and 80.7 Pa (acetoneO-[dimethoxy(vinyl)silyl]oxime).

Description of key information

It was not possible to determine the vapour pressure using neither the vapour pressure balance nor isoteniscope method.

Additional information

Using the software MPBPWIN v.1.41 2000, the calculated vapour pressures of the three main components of the test substance at 25 ºC were: 3.69 Pa (acetoneO,O'-[methoxy(vinyl)silanediyl]oxime); 0.251 Pa (acetoneO,O',O''-(vinylsilanetriyl)oxime) and 80.7 Pa (acetoneO-[dimethoxy(vinyl)silyl]oxime).