2-chlorotoluene

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

May 2000 (based on UTI-coding)

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Remarks:

Sources of the data provided via Chemsafe DB are own measurements and data compiled from the literature by the laboratories of BAM and PTB, which are specialized on assessing physico-chemical hazards of flammable gases, dusts (BAM), and liquids (PTB). The gathered data are checked in respect of their reliability, rated and stored in the data collection.

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Version / remarks:

No explicit method stated.

GLP compliance:

not specified

Other quality assurance:

other: Reliable data from BAM (Berlin) and PTB (Braunschweig), Germany

Type of method:

other: probably static method, based on data reported

Key result

Test no.:

#1

Temp.:

20 °C

Vapour pressure:

382.4 Pa

Remarks on result:

other: Calculated from Antoine equation

The following details were available from the Chemsafe database:

No.	T	vapor pressure	vapor pressure	vapor pressure
		Torr
	1	2	3	4
1	5 ... 159	7.7121	2018.31	258.216
Column-Description
1	T	temperature, recommended, saturated
2	vapor pressure	vapor pressure, recommended, parameter A, calculated, saturated
3	vapor pressure	vapor pressure, recommended, parameter B, calculated, saturated
4	vapor pressure	vapor pressure, calculated, saturated, recommended, parameter C
Description of equation
Equation-ID		1 - Antoine
Description		log(P) = A - B/(T+C)
Output unit (of equation)		Torr
Input unit (of equation)		degC
Component
1	95-49-8	1-chloro-2-methylbenzene
References
UTI	1100/2347/1/5/16.05.2000/wm
Literature	EXL-4900.2016

Möller,W., Datenbank PTB, 2016
EXL-4900.2016 [1100/2347/1/5/16.05.2000/wm]
Möller,W., Datenbank PTB, 2016
The document contains safety data recommended by the German national institute Physikalisch-Technische Bundesanstalt. Vapour pressure curves are represented by Antoine equation in the form log10(P) = A - B/(T+C). Constants A, B, C are given in the database together with the minimum and maximum temperature limiting
the valid range for the correlation.

 

From given Antoine parameters (Chemsafe DB), the following Temperature-pressure relationship was calculated:

°C	log(P) [torr]	P [Torr]	P [Pa]
5.4	0.05585	1.137	151.6
10	0.18716	1.539	205.1
15	0.32487	2.113	281.7
20	0.45763	2.868	382.4
25	0.58570	3.852	513.6
30	0.70933	5.121	682.7
35	0.82874	6.741	898.8
40	0.94415	8.793	1172.3
43.2	1.01601	10.375	1383.3
45	1.05576	11.370	1515.8
60	1.36952	23.416	3121.9

 

Conclusions:

Vapour pressure (Chemsafe, Dechema) of 2-chlorotoluene: 382.4 Pa at 20 °C

Executive summary:

The vapour pressure of 2-chlorotoluene is reported in the Chemsafe database maintained by PTB (Physikalisch-Technische Bundesanstalt, Braunschweig, Germany), BAM (Bundesanstalt für Materialforschung und –prüfung, Berlin) and DECHEMA (Frankfurt am Main, Germany). Data from PTB (Braunschweig) and BAM (Berlin) must be regarded as reliable chemical safety data. The data set on vapour pressure for 2-chlorotoluene is marked as "recommended" and verified in terms of reliability and data quality. Information on data origin is made available (data on vapour pressure from May 2000). Accordingly, the data are reliable.
Antoine constants are provided together with the experimentally assessed temperature range for which the resulting Antoine equation is valid (5 to 159 °C). Based on this data, the key value for chemical safety assessment (vapour pressure at 20 °C) was calculated:
Vapour pressure (Chemsafe, Dechema) of 2-chlorotoluene: 382.4 Pa at 20 °C

Description of key information

Vapour pressure (Chemsafe, Dechema) of 2-chlorotoluene: 382.4 Pa at 20 °C

Key value for chemical safety assessment

Vapour pressure:

382.4 Pa

at the temperature of:

20 °C

Additional information

Key study:
The vapour pressure of 2-chlorotoluene is reported in the Chemsafe database maintained by PTB (Physikalisch-Technische Bundesanstalt, Braunschweig, Germany), BAM (Bundesanstalt für Materialforschung und –prüfung, Berlin) and DECHEMA (Frankfurt am Main, Germany). Data from PTB (Braunschweig) and BAM (Berlin) must be regarded as reliable chemical safety data. The data set on vapour pressure for 2-chlorotoluene is marked as "recommended" and verified in terms of reliability and data quality. Information on data origin is made available (data on vapour pressure from May 2000). Accordingly, the data are reliable.
Antoine constants are provided together with the experimentally assessed temperature range for which the resulting Antoine equation is valid (5 to 159 °C). Based on this data, the key value for chemical safety assessment (vapour pressure at 20 °C) was calculated:
Vapour pressure (Chemsafe, Dechema) of 2-chlorotoluene: 382.4 Pa at 20 °C

This is supported by 6 further data sources reporting the vapour pressure for 2-chlorotoluene at different levels of detail. This is summarized in the table below:

T	Chemsafe, Dechema			Yaws (1994)	Verschueren (1996)	NIOSH (2003)	Rossberg (2006)	Kirk-Othmer (2001)	Jordan (1954)
°C	log(P) [torr]	P [Torr]	P [Pa]	P [Pa]	P [Pa]	P [Pa]	P [Pa]	P [Pa]	P [Pa]
5.4	0.05585	1.137	151.6	126.5			130		133
10	0.18716	1.539	205.1	175.4
15	0.32487	2.113	281.7	246.9
20	0.45763	2.868	382.4	342.8	360	350
25	0.58570	3.852	513.6	469.9
30	0.70933	5.121	682.7	636.4	670		670 (30.6°C)		667 (30.6°C)
35	0.82874	6.741	898.8	851.9
40	0.94415	8.793	1172.3	1128.1					1120
43.2	1.01601	10.375	1383.3	1342.8			1330	1300
45	1.05576	11.370	1515.8	1478.4
56.9	1.30713	20.283	2704.1	2707.4			2670
60	1.36952	23.416	3121.9	3143.2					3240
81	1.76217	57.833	7710.3	7969.2			8000		7746 (80°C)
86.3	1.85371	71.402	9519.2	9876.5

Overall, considering the supporting data, the data according to Chemsafe (Dechema, key) are confirmed to be reliable and relevant.