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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:
2010-09-01
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: This sample is referenced as BaCO3 VL600S Lot.010420 in our Laboratory Quality Control System.

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2010
Report Date:
2010

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
One liter of demineralised water has been adjusted to pH = 1,5 by adding HCl 37%; 300 ml of the previous solution has been spilled in one glass beaker and the temperature has been regulated at 37°C. Agitating sufficient quantity of the Ba-substance has been dissolved to reach a saturated solution keeping the temperature at 37 °C. After 15 minutes additional reaction time the solution has been filtered with preheated filtering equipment. The barium content in the filtrate has been determined by gravimetric analysis (the filtrate had for BaCO3 test a pH = 6.8).
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid
Details on test material:
- Name of test material (as cited in study report): Barium carbonate VL600S
- Batch No.: 010420
- Chemical description: Barium carbonate
- Molecular formula: BaCO3
- Molecular weight: 197.34 g/mol
- Physical state: Solid, white powder
- Storage condition of test material: Ambient temperature, dark, dry and original containers
- Expiration date of the batch: Unlimited total self life if stored in tightly closed original container at room temperature, in any case at least 3 years

Results and discussion

pH value
pH value:
6.8
Temp.:
37 °C
Concentration:
3.67 g/L
Remarks on result:
other: HCl media pH 1.5

Applicant's summary and conclusion

Conclusions:
3.67 g/L barium carbonate dissolves in a artificial gastic fluid of HCl solution (pH 1.5) at 37°C. After dissolution the pH value of the solution was: 6.8