Allyl isothiocyanate

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1993

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Principles of method if other than guideline:

Principle of test:
Allyl Isothiocyanate vapour pressure was measured using the transpiration method.

Short description of test conditions:
Ca. 3 ml of Allyl Isothiocyanate was dispensed into the receptacle of the transpiration measurement device. Dry nitrogen gas or nitrogen gas of 80% relative humidity was introduced into the receptacle at a constant flow rate and Allyl Isothiocyanate vapor was guided into a trap cooled with liquid nitrogen.
The trap was removed after a fixed period of time and the liquefied Allyl Isothiocyanate was diluted homogeneously with 2 ml di acetone. This test solution was analysed by Gas Chromatography and the volume of Allyl Isothiocyanate trapped was determined using a calibration curve prepared beforehand. Measurement was performed three times at 0% relative humidity and twice at 80%.

Parameters analysed / observed:
Vapour pressure of Allyl Isothiocyanate at relative humidities of 0% and 80%.

GLP compliance:

not specified

Type of method:

other: transpiration method

Specific details on test material used for the study:

Test item purity 99.9%

Test no.:

#1

Temp.:

23 °C

Vapour pressure:

3.4 mm Hg

Conclusions:

Vapor pressure of Allyl Isothiocyanate is 3.4 mmHg at 23°C.

Key value for chemical safety assessment

Vapour pressure:

0.453 kPa

at the temperature of:

23 °C