ethametsulfuron-methyl (ISO); methyl 2-[(4-ethoxy-6-methylamino-1,3,5-triazin-2-yl)carbamoylsulfamoyl]benzoate

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7950 (Vapor Pressure)

Deviations:

no

GLP compliance:

yes

Type of method:

gas saturation method

Test material

Test material information

Constituent 1

Reference substance name:

Reference substance 002

Cas Number:

97780-06-8

Test material form:

solid

Details on test material:

- Purity: 100%

Results and discussion

Vapour pressure

Vapour pressure 1

Key result

Test no.:

#1

Temp.:

25.2 °C

Vapour pressure:

0 Pa

Vapour pressure 2

Key result

Test no.:

#2

Temp.:

35.2 °C

Vapour pressure:

0 Pa

Vapour pressure 3

Key result

Test no.:

#3

Temp.:

45.3 °C

Vapour pressure:

0 Pa

Vapour pressure 4

Key result

Temp.:

25 °C

Vapour pressure:

0 Pa

Remarks on result:

other: determined by vapour pressure curve

Any other information on results incl. tables

Vapour Pressure at 25°C

The duration of the main test conducted at 25°C was approximately 29 days. The vapour pressure of the test item was determined at three different gas flow rates. The vapour pressure of the test item was 1.0834E-7, 4.7000E-7, and 4.2335E-7 Pa at 20, 30, and 40 mL/min flow rates, respectively. These results clearly indicate that the nitrogen gas was completely saturated with test item at all three flow rates for the duration of the test. The mean value of vapour pressure was 6.5892E-7Pa.

Vapour Pressure at 35°C

The duration of the main test conducted at 35°C was approximately 30 days. The vapour pressure of the test item was determined at three different gas flow rates. The vapour pressure of the test item was 7.8117E-7, 3.5164E-7, and 2.4079E-7 Pa at 20, 30, and 40 mL/min carrier gas flow rate, respectively. These results clearly indicate that the carrier gas was completely saturated with test item at all three flow rates for the duration of the test. The mean value of vapour pressure was 4.5787E-7 Pa.

Vapour Pressure at 45°C

The duration of the main test conducted at 45°C was approximately 31 days. The vapour pressure of the test item was determined at three different gas flow rates. The vapour pressure of the test item was 6.6937E-7, 3.2473E-7, and 1.8308E-7 Pa at 20, 30, and 40 mL/min carrier gas flow rate, respectively. These results clearly indicate that the carrier gas was completely saturated with test item at all three flow rates for the duration of the test. The mean value of vapour pressure was 3.9239E-7 Pa.

	VAPOURPRESSURE(P)OFTESTITEM(Pa)
TEMPERATURE	20 mL/min	30 mL/min	40 mL/min	Mean
25.2°C (298.35 K)	1.08E-06	4.70E-07	4.23E-07	6.59E-07
35.2°C (308.35 K)	7.81E-07	3.52E-07	2.41E-07	4.58E-07
45.3°C (318.45 K)	6.69E-07	3.25E-07	1.83E-07	3.92E-07
25°C (298.15 K)* 6.41E-7Pa (4.808E-9mm Hg or Torr)

* The vapour pressure at 25 °C presented above was calculated using linear regression equation, which resulted from plotting VP (vapour pressure in Pa) versus temerature (1/T) in Kelvin.

Applicant's summary and conclusion

Conclusions:

The measured vapour pressure of the test substance at 25, 35, and 45°C was 6.5892E-7, 4.5787E-7, and 3.9239E-7, respectively. The calculated vapour pressure at 25°C was 6.41E-7 Pa (4.808E-9 mm Hg or Torr)

Executive summary:

This study was conducted to determine the vapour pressure of the test substance. The vapour pressure was determined according to the regulatory guidelines: OPPTS 830.7950 and OECD 104 employing the Gas Saturation method. The vapour pressure of the test item was determined at three gas flow rates (approximately 20, 30, and 40 mL/min) and at three temperatures (25, 35, and 45°C). The mean vapour pressure values were 6.5892E-7, 4.5787E-7, and 3.9239E-7 Pa at 25, 35, and 45°C, respectively. The calculated vapour pressure was determined to be 6.41E-7 Pa (4.808E-9 mm Hg or Torr) at 25 °C.