1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, ester with phenyl(2,3,4-trihydroxyphenyl)methanone

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

11 Aug - 10 Sep 2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2014

Report date:

2014

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

Landesamt für Umwelt, Wasserwirtschaft und Gewerbeaufsicht, Mainz, Germany

Type of method:

effusion method: by loss of weight or by trapping vaporisate

Test material

Test material information

Constituent 1

Reference substance name:

1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, ester with phenyl(2,3,4-trihydroxyphenyl)methanone

EC Number:

270-931-7

EC Name:

1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, ester with phenyl(2,3,4-trihydroxyphenyl)methanone

Cas Number:

68510-93-0

Molecular formula:

all potential esters of C10HH5O3N2SCl and C13H10O4

IUPAC Name:

3-benzoyl-2-hydroxy-6-({[5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalen-1-yl]sulfonyl}oxy)phenyl 5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalene-1-sulfonate; 4-benzoyl-2,3-bis({[5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalen-1-yl]sulfonyl}oxy)phenyl 5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalene-1-sulfonate; 4-benzoyl-2,3-dihydroxyphenyl 5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalene-1-sulfonate

Test material form:

solid

Specific details on test material used for the study:

Storage conditions: room temperature (20 ± 5 °C); keep away from light; do not close airtight

Results and discussion

Vapour pressure

Temp.:

25 °C

Vapour pressure:

ca. 0 Pa

Remarks on result:

other: The vapour pressure is below the limit of any method listed in EU A.4.

Transition / decomposition

Key result

Transition / decomposition:

yes

Remarks:

decomposition

Transition temp.:

>= 60 - <= 105 °C

Any other information on results incl. tables

Results
Table 2 - Findings

Temperature [°C]	Observation
30 and 45	No relevant and reproducible weight loss
60	Test item surface became darker: start of decomposition
75	Half of test item discoloured
90	Complete test item discoloured
105	Test item dark brown

 

Based on the observations above, a calculation on the basis of the measured weight losses was not possible. Therefore, a calculation of the vapour pressure was made based on the SMILES-Code below (provided by the sponsor):

O=C1c2cccc(c2\C=C/C1=[N+]=[N-])S(=O)(=O)Oc7c(ccc(OS(=O)(=O)c4cccc3C(=O)C(=[N+]=[N-])/C=C\c34)c7OS(=O)(=O)c6cccc5c6/C=C\C(=[N+]=[N-])C5=O)C(=O)c8ccccc8

 

Using the software EPISUITE by the Environmental Protection Agency (US EPA) Vers. 4.11 using the mean of the modified Grain method gave the following value of vapour pressure at 25 °C: 0 Pa.

This means that the vapour pressure is << 1.0E-10 Pa and is therefore below the limit of the effusion method or all other method listed in OECD 104, namely EU A.4.