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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

vapour pressure
Type of information:
calculation (if not (Q)SAR)
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Study period:
16 Nov 2011
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Acceptable, well-documented study report which meets basic scientific principles.

Data source

Referenceopen allclose all

Reference Type:
other: software
EPI Suite(TM), Version 4.1
US Environmental Protection Agency
Bibliographic source:
Online:, accessed: November 2011
Reference Type:
study report
Report date:

Materials and methods

Principles of method if other than guideline:
Calculated limit value according to column 2 in Annex VII of Regulation (EC) No 1907/2006 (melting point - here: decomposition temperature -between 200°C and 300°C, see section 4.2).
Type of method:
other: estimate

Test material

Constituent 1
Chemical structure
Reference substance name:
EC Number:
EC Name:
Cas Number:
Molecular formula:

Results and discussion

Vapour pressure
25 °C
Vapour pressure:
< 0 Pa

Any other information on results incl. tables

Software output:

Experimental Database Structure Match: no data

SMILES: O=C(Nc(c(ccc1)C)c1)c(c(O)c(N=Nc(c(N(=O)(=O))cc(c2)CL)c2)c(c3ccc4)c4)c3

CHEM  : 2-Naphthalenecarboxamide, 4- (4-chloro-2-nitrophenyl)azo -3-hydroxy-N


MOL FOR: C24 H17 CL1 N4 O4

MOL WT : 460.88

------------------------ SUMMARY MPBPWIN v1.43 --------------------

Boiling Point: 684.36 deg C (Adapted Stein and Brown Method)

Melting Point: 349.84 deg C (Adapted Joback Method)

Melting Point: 285.93 deg C (Gold and Ogle Method)

Mean Melt Pt : 317.89 deg C (Joback; Gold,Ogle Methods)

 Selected MP: 298.72 deg C (Weighted Value)

Vapor Pressure Estimations (25 deg C):

 (Using BP: 684.36 deg C (estimated))

 (Using MP: 298.72 deg C (estimated))

VP: 1.61E-024 mm Hg (Antoine Method)

     : 2.15E-022 Pa (Antoine Method)

VP: 1.97E-017 mm Hg (Modified Grain Method)

     : 2.62E-015 Pa (Modified Grain Method)

VP: 1.77E-015 mm Hg (Mackay Method)

     : 2.36E-013 Pa (Mackay Method)

Selected VP: 1.97E-017 mm Hg (Modified Grain Method)

            : 2.62E-015 Pa (Modified Grain Method)

Subcooled liquid VP: 2.22E-014 mm Hg (25 deg C, Mod-Grain method)

                    : 2.96E-012 Pa (25 deg C, Mod-Grain method) Interpretation:

On the basis of the vapour pressure of 2.62 x 10-15 Pa selected in the software output, a limit value of <0.000001 Pa is chosen.

Applicant's summary and conclusion

The vapour pressure of the submission substance is estimated to be far below 0.000001 Pa.
Executive summary:

The vapour pressure of the submission substance was estimated by calculation in accordance with column 2 in Annex VII of Regulation (EC) No 1907/2006 by a calculation method recommended by the Guidance on Information Requirements and Chemical Safety Assessment (chapter R., MPBPVP of the EPI Suite (TM) software by the US Environmental Protection Agency (EPA, 2011).

The calculated vapour pressure value at 25°C is far below the chosen limit value of 0.000001 Pa.