N,N'-diphenyl-N,N'-bis(3-methylphenyl)-(1,1'-diphenyl)-4,4'-diamine

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

December 1991

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: guideline study (A.4)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1991

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: 84/449/EWG, A.4 (vapour pressure balance)

Deviations:

not specified

GLP compliance:

yes

Type of method:

effusion method: vapour pressure balance

Test material

Test material information

Constituent 1

Reference substance name:

N,N'-diphenyl-N,N'-bis(3-methylphenyl)-(1,1'-diphenyl)-4,4'-diamine

EC Number:

413-810-8

EC Name:

N,N'-diphenyl-N,N'-bis(3-methylphenyl)-(1,1'-diphenyl)-4,4'-diamine

Cas Number:

65181-78-4

Molecular formula:

C38H32N2

IUPAC Name:

N4,N4'-bis(3-methylphenyl)-N4,N4'-diphenyl-[1,1'-biphenyl]-4,4'-diamine

Details on test material:

Name of test material: N4,N4'-Diphenyl-N4,N4'-di-m-tolyl-biphenyl-4,4'-diamine RXSS/91/404
Physical state: white powder
Lot/batch No.: 0119

Results and discussion

Vapour pressure

Temp.:

25 °C

Vapour pressure:

3.356 Pa

Any other information on results incl. tables

The solid sample was maintained below about 167°C during measurements & did not visibly appaer to have suffered any decomposition at the temperatures used.There was no condensation onto the balance pan at the higher temperatures. The quoted melting point is 168 -174°C.

There was removal of volatiles on initial pumping & also subsequently at the higher temperatures in Run 1 where the mass differences above 87°C dininished with time indicating further loss of volatility. In Run 2 the mass differences behaved sinilarly erratically at temperatures above 150°C. Because of the erratic behaviour reliable vapour pressure curves cannot be produced & recourse was made to obtaining an etimated value from the mass difference for the most degassed sample in Run 2 by imposing a slope of -2000 for the vapour pressure relationship. This gave the above value Vp 25°C) = 3.356 x 10 -6 Pa. This is a maximum value for regulatory purposes and should have no environmental implication.