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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

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
Guideline:
OECD Guideline 122 (Determination of pH, Acidity and Alkalinity)
GLP compliance:
no

Test material

Constituent 1
Reference substance name:
Tin sulphate
EC Number:
231-302-2
EC Name:
Tin sulphate
Cas Number:
7488-55-3
IUPAC Name:
tin(4+) disulfate
Constituent 2
Reference substance name:
sulphuric acid, tin(II) salt
IUPAC Name:
sulphuric acid, tin(II) salt
Constituent 3
Reference substance name:
Tin (II) sulphate
IUPAC Name:
Tin (II) sulphate
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 %.