Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint:
acidity / alkalinity
Remarks:
pH / acid reserve determination
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 122 (Determination of pH, Acidity and Alkalinity)
Deviations:
no
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Reaction Mass of zirconium difluoride oxide and fluorozirconic acid
EC Number:
947-897-3
Molecular formula:
(ZrOF2 )x(F6Zr.2H)y
IUPAC Name:
Reaction Mass of zirconium difluoride oxide and fluorozirconic acid
Test material form:
other: aqueous solution
Specific details on test material used for the study:
- Name of test material (as cited in study report): Fluorozirconic Acid Concentrated Replenisher
- Substance type: Multi-constituent substance
- Analytical purity: 100%
- Other: Stable until August 1, 2018
- Batch nr: WET-17-06737
- Appearance: Clear, colorless liquid


Reagents

Reagent:
NaOH solution

Titration of acidity and alkalinity

Details on titrant used:
Reagents:
* Buffer Solutions: pH 4, pH 7, pH 9 and pH 10 (commercially available solutions from Fisher Chemical).
pH 7 Lot 167801, expiration 12/2018
pH 4 Lot 165942, expiration 10/2018
pH 9 Lot 163123, expiration 05/2018
pH 10 Lot 165150, expiration 08/2018

* Water: Distilled/Deionized water, with an electrical resistivity ≥ 1 MΩ.cm, and freshly distilled/deionized and stored to prevent accumulation of CO2 from the atmosphere.
* Sodium Hydroxide Standard Solution: NaOH 0.1 mol/L (0.1N) standardized solution; standardized with potassium hydrogen phthalate.

Results and discussion

pH value
Key result
pH value:
0.8
Temp.:
25 °C
Concentration:
10 vol%
Acidity or alkalinity
Key result
Acidity or alkalinity:
acidity
Value:
27.27

Any other information on results incl. tables

Results obtained for 3 replicates

 pH @ 25°C (tested neat/2 minutes)average of 3 replicates  0.80 ± 0.02
% Acidity (mass/mass) at pH 7

(Acid Reserve) as % H2SO4

average of 3 replicates 

 27.27% ± 0.13 
% Acidity (mass/mass) at pH 4

(Acid Reserve) as % H2SO4

average of 3 replicates 

  5.50% ± 0.12  
  Milli-equivalents Acid (meq/g)average of 3 replicates   6.122 ± 0.144

The pH value was determined to be 0.80. The calculation for corrosivity yielded a score of -1.05 (< = -0.5) and therefore the substance was considered to be corrosive.

Applicant's summary and conclusion

Conclusions:
The pH value was determined to be 0.80. The calculation for corrosivity yielded a score of -1.05 (<= -0.5) and therefore the substance was considered to be corrosive.