Phosphorodithioic acid, mixed O,O-bis(2-ethylhexyl and iso-Bu and iso-Pr) esters, zinc salts

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Testing was conducted between 15 September 2010 and 24 September 2010.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results. The study report was conclusive, done to a valid guideline and the study was conducted under GLP conditions.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: Testing was conducted using a procedure designed to be compatible with Method A4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008, and Method 104 specified in the OECD Guidelines for Testing of Chemicals, 23 March 2006.

Deviations:

no

Principles of method if other than guideline:

The vapour pressure was determined using a vapour pressure balance with measurements being made at several temperatures and linear regression analysis used to calculate the vapour pressure at 25°C. Testing was conducted using a procedure designed to be compatible with Method A4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008, and Method 104 specified in the OECD Guidelines for Testing of Chemicals, 23 March 2006.

GLP compliance:

yes (incl. QA statement)

Type of method:

effusion method: vapour pressure balance

Test material

Test material information

Constituent 1

Reference substance name:

X-3383

IUPAC Name:

X-3383

Details on test material:

Sponsor's identification: X-3383
Description : pale yellow viscous liquid
Batch number : not supplied
Label : INVENTORY NO: X-3383
Date received : 10 August 2010
Expiry date : 06 August 2016
Storage conditions: room temperature in the dark

Results and discussion

Vapour pressure

Temp.:

25 °C

Vapour pressure:

0.013 Pa

Transition / decomposition

Transition / decomposition:

no

Any other information on results incl. tables

Results

Run 1

Temperature (ºC)	Temperature (K)	Reciprocal Temperature (K^-1)	Mass Difference (µg)	Mass Difference (kg)	Vapour Pressure (Pa)	Log10Vp
40	313.15	0.003193358	39.73	3.973E-08	0.055155419	-1.258411814
41	314.15	0.003183193	39.16	3.916E-08	0.054364113	-1.264687696
42	315.15	0.003173092	40.36	4.036E-08	0.056030020	-1.251579221
43	316.15	0.003163056	46.18	4.618E-08	0.064109671	-1.193076450
44	317.15	0.003153082	51.90	5.190E-08	0.072050497	-1.142363021
45	318.15	0.003143171	51.29	5.129E-08	0.071203660	-1.147497680
46	319.15	0.003133323	60.87	6.087E-08	0.084503155	-1.073127077
47	320.15	0.003123536	64.21	6.421E-08	0.089139931	-1.049927709
48	321.15	0.003113810	71.95	7.195E-08	0.099885033	-1.000499580
49	322.15	0.003104144	73.59	7.359E-08	0.102161774	-0.990711576
50	323.15	0.003094538	87.34	8.734E-08	0.121250296	-0.916317191

A plot of Log₁₀(vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 1 gives the following statistical data using an unweighted least squares treatment.

Slope                                       -3598.897
Standard deviation in slope     212.846

Intercept                                        10.196
Standard deviation in intercept    0.669

The results obtained indicate the following vapour pressure relationship:

Log₁₀(Vp (Pa)) = -3598.897/temp(K) + 10.196

The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of -1.875.

Run 2

Temperature (ºC)	Temperature (K)	Reciprocal Temperature (K^-1)	Mass Difference (µg)	Mass Difference (kg)	Vapour Pressure (Pa)	Log10Vp
40	313.15	0.003193358	38.72	3.872E-08	0.053753280	-1.269595030
41	314.15	0.003183193	38.77	3.877E-08	0.053822693	-1.269034578
42	315.15	0.003173092	36.28	3.628E-08	0.050365935	-1.297863100
43	316.15	0.003163056	43.00	4.300E-08	0.059695017	-1.224061923
44	317.15	0.003153082	48.03	4.803E-08	0.066677945	-1.176017792
45	318.15	0.003143171	51.55	5.155E-08	0.071564607	-1.145301709
46	319.15	0.003133323	53.10	5.310E-08	0.073716404	-1.132435858
47	320.15	0.003123536	60.24	6.024E-08	0.083628553	-1.077645416
48	321.15	0.003113810	63.30	6.330E-08	0.087876617	-1.056126669
49	322.15	0.003104144	71.11	7.111E-08	0.098718898	-1.005599700
50	323.15	0.003094538	78.91	7.891E-08	0.109547297	-0.960398335

A plot of Log₁₀(vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 2 gives the following statistical data using an unweighted least squares treatment.

Slope                                       -3364.470
Standard deviation in slope     248.559

Intercept                                          9.429
Standard deviation in intercept    0.781

The results obtained indicate the following vapour pressure relationship:

Log₁₀(Vp (Pa)) = -3364.470/temp(K) + 9.429

The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of -1.855.

Run 3

Temperature (ºC)	Temperature (K)	Reciprocal Temperature (K^-1)	Mass Difference (µg)	Mass Difference (kg)	Vapour Pressure (Pa)	Log10Vp
40	313.15	0.003193358	34.03	3.403E-08	0.047242358	-1.325668430
41	314.15	0.003183193	35.89	3.589E-08	0.049824515	-1.302556920
42	315.15	0.003173092	39.15	3.915E-08	0.054350230	-1.264798612
43	316.15	0.003163056	40.93	4.093E-08	0.056821326	-1.245488634
44	317.15	0.003153082	47.77	4.777E-08	0.066316999	-1.178375137
45	318.15	0.003143171	50.58	5.058E-08	0.070217999	-1.153551554
46	319.15	0.003133323	53.53	5.353E-08	0.074313354	-1.128933135
47	320.15	0.003123536	57.44	5.744E-08	0.079741436	-1.098315947
48	321.15	0.003113810	67.13	6.713E-08	0.093193639	-1.030613732
49	322.15	0.003104144	71.48	7.148E-08	0.099232553	-1.003345835
50	323.15	0.003094538	73.81	7.381E-08	0.102467190	-0.989415173

A plot of Log₁₀(vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 3 gives the following statistical data using an unweighted least squares treatment.

Slope                                       -3609.983
Standard deviation in slope     123.440

Intercept                                        10.191
Standard deviation in intercept    0.388

The results obtained indicate the following vapour pressure relationship:

Log₁₀(Vp (Pa)) = -3609.983/temp(K) + 10.191

The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of -1.916.

Run 4

Temperature (ºC)	Temperature (K)	Reciprocal Temperature (K^-1)	Mass Difference (µg)	Mass Difference (kg)	Vapour Pressure (Pa)	Log10Vp
40	313.15	0.003193358	34.90	3.490E-08	0.048450141	-1.314704952
41	314.15	0.003183193	32.99	3.299E-08	0.045798572	-1.339148063
42	315.15	0.003173092	39.56	3.956E-08	0.054919415	-1.260274096
43	316.15	0.003163056	47.79	4.779E-08	0.066344764	-1.178193348
44	317.15	0.003153082	45.53	4.553E-08	0.063207305	-1.199232728
45	318.15	0.003143171	44.92	4.492E-08	0.062360468	-1.205090631
46	319.15	0.003133323	52.68	5.268E-08	0.073133337	-1.135884612
47	320.15	0.003123536	57.34	5.734E-08	0.079602610	-1.099072690
48	321.15	0.003113810	56.36	5.636E-08	0.078242119	-1.106559394
49	322.15	0.003104144	66.88	6.688E-08	0.092846575	-1.032234114
50	323.15	0.003094538	77.66	7.766E-08	0.107811976	-0.967332993

A plot of Log₁₀(vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 4 gives the following statistical data using an unweighted least squares treatment.

Slope                                       -3353.445
Standard deviation in slope     309.168

Intercept                                          9.374
Standard deviation in intercept    0.972

The results obtained indicate the following vapour pressure relationship:

Log₁₀(Vp (Pa)) = -3353.445/temp(K) + 9.374

The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of -1.873.

For Graphs of Log₁₀Vapour Pressure vs Reciprocal Temperature for Runs 1 - 4 Please see Attachment 2.

Applicant's summary and conclusion

Conclusions:

The vapour pressure of the test item has been determined to be 1.3 x 10e-2 Pa at 25ºC.

Executive summary:

INTRODUCTION

Hazardous physico-chemical properties of the test item have been determined.

Methods employed are designed to be compatible with those specified in Commission Regulation (EC) No 440/2008 of 30 May 2008, Part A: Methods for the determination of physico-chemical properties and the current OECD Guidelines for Testing of Chemicals.

Method

The vapour pressure was determined using a vapour pressure balance withasurents being made at several temperatures and linear regression analysis used to calculate the vapour pressure at 25°C. Testing was conducted using a procedure designed to be compatible with Method A4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008, and Method 104 specified in the OECD Guidelines for Testing of Chemicals, 23 March 2006.

Summary of Results

Run	Log10[Vp(25ºC)]
1	-1.875
2	-1.855
3	-1.916
4	-1.873
Mean	-1.880
Vapour Pressure	1.318 x 10^-2Pa

The test item did not change in appearance under the conditions used in the determination.

Conclusion

The vapour pressure of the test item has been determined to be1.3 x 10^-2Pa at 25ºC.