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Physical & Chemical properties

pH

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Administrative data

Endpoint:
pH
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2015-05-08
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015
Report Date:
2015

Materials and methods

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

Test material

Reference
Name:
Unnamed
Type:
Constituent
Type:
Constituent
Type:
Constituent
Test material form:
solid: crystalline
Details on test material:
- Name of test material (as cited in study report): stannous sulphate
- Physical state: crystals, colorless
- Purity: contains 54% of tin, corresponding to a purity of 97.7%
- Purity test date: 2015-03-02
- Expiration date of the lot/batch: 2015-09-02
- Storage condition of test material: In original container, at 15°C to 25°C

Reagents

Reagent:
water

Results and discussion

pH valueopen allclose all
pH value:
2.25
Temp.:
20 °C
Concentration:
1.01 other: w/w %
pH value:
1.8
Temp.:
20 °C
Concentration:
2.5 other: w/w %

Any other information on results incl. tables

Measurement

m (SnSO4)/ g m (SnSO4, H2O)/ g ω (SnSO4)/ % pH value
1.01        100.00 1.01 2.24
2.26
2.25
2.50 99.98 2.5 1.80
1.80
1.81

Applicant's summary and conclusion

Conclusions:
The pH value of a stannous sulphate solution was determinated to be 2.3 at 1.0 w/w % and 1.8 at 2.5 w/w %.