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Administrative data

Endpoint:
acidity / alkalinity
Remarks:
pH / acid reserve determination
Type of information:
experimental study
Adequacy of study:
key study
Study period:
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:
OECD Guideline 122 (Determination of pH, Acidity and Alkalinity)
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Zirconium dinitrate oxide
EC Number:
237-529-3
EC Name:
Zirconium dinitrate oxide
Cas Number:
13826-66-9
Molecular formula:
N2O7Zr
IUPAC Name:
zirconium dinitrate oxide
Details on test material:
No information given on test material.

Reagents

Reagent:
NaOH solution

Titration of acidity and alkalinity

Details on titrant used:
NaOH solution of 1 M

Results and discussion

pH value
Key result
pH value:
1.17
Temp.:
20 °C
Concentration:
10 vol%
Acidity or alkalinity
Key result
Acidity or alkalinity:
acidity
Value:
9.62

Any other information on results incl. tables

Results obtained for the four samples

 

pH

Volume NaOH (mL)

Corrosivity calculation

Test 1

1.173

24.3

0.363

Test 2

1.116

24.1

0.313

Test 3

1.205

23.8

0.412

Test 4

1.182

24

0.382

The pH value was determined to be 1.17 and the acidic reserve was determined to be 9.62. Therefore, the calculation for corrosivity yielded a score of 0.37 (higher than -0.5) and therefore the substance was considered not to be corrosive.

Applicant's summary and conclusion

Conclusions:
The pH value was determined to be 1.17 and the acidic reserve was determined to be 9.62. Therefore, the calculation for corrosivity yielded a score of 0.37 (higher than -0.5) and therefore the substance was considered not to be corrosive.