Tin difluoride

pH

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

Test material information

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 value

pH value 1

pH value:

2.25

Temp.:

20 °C

Concentration:

1.01 other: w/w %

pH value 2

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 %.