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EC number: 940-448-2 | CAS number: -
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
In accordance with column 2 adaptation statement of Annex VII Regulation (EC) No 1907/2006 (REACH), the determination of the vapour pressure (as required in section 7.5 of Annex VII) was waived as the melting point is between 200 °C and 300 °C. In addition the substance decomposes when heated. Thus the experimental determination was replaced by an appropriate calculation method. The vapour pressure at 25 °C was estimated to be 1.26E-13 mm Hg corresponding to 1.68E-11 Pa using the Modified Grain method. For technical reasons it was not possible to enter the correct value as IUCLID only accepts values with a maximum of 9 digits. Instead of 1.68 E-11 1.68E-9 was given as key value.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
In accordance with column 2 adaptation
statement of Annex VII Regulation (EC) No 1907/2006 (REACH), the
determination of the vapour pressure (as required in section 7.5 of
Annex VII) was waived as the melting point is between 200 °C and 300 °C.
Thus the experimental determination was replaced by an appropriate
calculation method.
The substance Reaction products of
9-[2-(ethoxycarbonyl)phenyl]-3,6-bis(ethylamino)-2,7-dimethylxanthylium
chloride and naphthalenesulfonic acids, reaction products with
formaldehyde, ammonium salts is described as UVCB substance Type 2 where
the source is chemical or mineral and the process is a synthesis. The
reaction product is formed by an ionic addition reaction of Basic Red 1
and Naphthalenesulfonic acid, reaction products with formaldehye
resulting in formation of the product.
Thus, the substance cannot be described by a single SMILES code which is
required as input parameter for the calculation model. For the
estimation of the vapour pressure the SMILES code from Basic Red 1
(Rhodamin 6G) as starting material was used as input parameter. Basic
Red 1 is the starting material with the lowest molecular weight and
therefore was expected to have the highest vapour pressure. Furthermore
this approach was regarded as worst case scenario for the presence of
remaining unreacted starting material in the reaction product. In
addition it was assumed that due to the significant increase of
molecular weight during the ionic addition reaction the vapour pressure
of the reaction product will be considerable lower than the vapour
pressure of the starting materials. The molecular weight of the chosen
starting material was 479.02 g/mol.
The vapour pressure of Rhodamin 6G at 25 °C was estimated to be 1.26E-13
mm Hg corresponding to 1.68E-11 Pa using the Modified Grain method.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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