Registration Dossier

Administrative data

Endpoint:
pH
Type of information:
experimental study
Adequacy of study:
key study
Study period:
23-07-2018 – 23-07-2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Experimental test result performed using standard test guidelines

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report Date:
2018

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: OECD 122
Principles of method if other than guideline:
The pH determination of test item tetrasodium 7-amino-4-hydroxy-3-[(E)-2-{2-methoxy-5-methyl-4-[2- (sulfonatooxy)ethanesulfonyl]p henyl}diazen-1-yl]-8-[(E)-2-{2-sulfonato-4-[2- (sulfonatooxy)ethanesulfonyl]phenyl}diazen-1-yl]naphthalene-2-sulfonate (CAS No. 503155-49-5 ) was done as per the test guideline OECD 122. The mean pH of the test solutionwas determined with the help of digital pH meter.
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
- Name of test material : 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[[2-methoxy-5-methyl-4-[[2-(sulfooxy)ethyl]sulfonyl] phenyl]azo]-8-[[2-sulfo-4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, tetrasodium salt
- Molecular formula : C28H25N5Na4O20S6
- Molecular weight : 1035.87 g/mol
- Smiles notation : Cc1cc(N=Nc2c(S(=O)(=O)O{-}.[Na]{+})cc3c(ccc(N)c3N=Nc3ccc(S(=O)(=O)CCOS(=O)(=O)O{-}.[Na]{+})cc3S(=O)(=O)O{-}.[Na]{+})c2O)c(OC)cc1S(=O)(=O)CCOS(=O)(=O)O{-}.[Na]{+}
- Substance type : Organic
- Physical state : Solid
Specific details on test material used for the study:
- Name of test material : 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[[2-methoxy-5-methyl-4-[[2-(sulfooxy)ethyl]sulfonyl] phenyl]azo]-8-[[2-sulfo-4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, tetrasodium salt
- Molecular formula : C28H25N5Na4O20S6
- Molecular weight : 1035.87 g/mol
- Smiles notation : Cc1cc(N=Nc2c(S(=O)(=O)O{-}.[Na]{+})cc3c(ccc(N)c3N=Nc3ccc(S(=O)(=O)CCOS(=O)(=O)O{-}.[Na]{+})cc3S(=O)(=O)O{-}.[Na]{+})c2O)c(OC)cc1S(=O)(=O)CCOS(=O)(=O)O{-}.[Na]{+}
- Substance type : Organic
- Physical state : Solid

Results and discussion

pH value
Key result
pH value:
4.4
Temp.:
26.3 °C
Concentration:
1 vol%
Remarks on result:
other: No other detail available

Any other information on results incl. tables

    Method Details  Observations  Remarks if, any
 Guideline  OECD 122                   
 Method  Digital pH meter  
 Principle of Method

 The mean pH of an aqueous

solution or dispersion in water was

determined with a pH

measurement interface equipped

with an appropriate electrode

system.

 

 Temperature of 1% w/v

test solution

 

 26.3°C

 mean pH (RESULT)

 

 4.40

 Inference

1. Acidic

2. Basic

3. Neutral


Acidic 

Applicant's summary and conclusion

Conclusions:
The pH determination of test item tetrasodium 7 -amino-4 -hydroxy-3 -[(E)-2 -{2 -methoxy-5 -methyl-4 -[2 - (sulfonatooxy)ethanesulfonyl]phenyl}diazen-1 -yl]-8 -[(E)-2 -{2 -sulfonato-4 -[2 - (sulfonatooxy)ethanesulfonyl]phenyl}diazen-1 -yl]naphthalene-2 -sulfonate (CAS No. 503155 -49 -5 ) was done as per the test guideline OECD 122. The mean pH of the test solutionwas determined with the help of digital pH meter. The mean pH was determine to be 4.40 at 26.3 °C.
Executive summary:

The pH determination of test item tetrasodium 7 -amino-4 -hydroxy-3 -[(E)-2 -{2 -methoxy-5 -methyl-4 -[2 - (sulfonatooxy)ethanesulfonyl]phenyl}diazen-1 -yl]-8 -[(E)-2 -{2 -sulfonato-4 -[2 - (sulfonatooxy)ethanesulfonyl]phenyl}diazen-1 -yl]naphthalene-2 -sulfonate (CAS No. 503155 -49 -5 ) was done as per the test guideline OECD 122. The mean pH of the test solutionwas determined with the help of digital pH meter. The mean pH was determine to be 4.40 at 26.3 °C.