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Physical & Chemical properties

Water solubility

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Administrative data

Endpoint:
water solubility
Type of information:
not specified
Adequacy of study:
supporting study
Study period:
No data
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: Secondary literature source.

Data source

Referenceopen allclose all

Reference Type:
review article or handbook
Title:
Mellor's comprehensive treatise on inorganic and theoretical chemistry.
Author:
Mellor JM
Year:
1980
Bibliographic source:
Mellor's comprehensive treatise on inorganic and theoretical chemistry. Volume V, Part A: Boron-oxygen compounds: 254.
Reference Type:
publication
Title:
No information
Author:
Dawber JG & Matusin DH
Year:
1982
Bibliographic source:
J. Soc., Faraday Trans. 1, 78 : 2521 - 2528.

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: No data
Deviations:
not specified
Principles of method if other than guideline:
No data
GLP compliance:
not specified
Type of method:
other: No data

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material: Boric oxide
- Analytical purity: 98.1 - 99.8 %

Results and discussion

Water solubility
Water solubility:
22 g/L
Temp.:
20 °C
pH:
3.7

Any other information on results incl. tables

Concentration: 26.6 g/L at 20 °C. pKa = 9.15 at 20 °C. Boric oxide is the anhydride of boric acid. It is hydroscopic and takes up water to form boric acid. Therefore for practical purposes one part of boric oxide is equivalent to 1.776 parts of boric acid in aqueous solution.

pH of aqueous solution ranges from 6.1 at 0.056 % w/w boric oxide, equivalent to to 3.7 at 2.66 % w/w boric oxide equivalent at 20 °C.

Applicant's summary and conclusion

Conclusions:
Interpretation of results (migrated information): slightly soluble (0.1-100 mg/L)
The water solubility of the test substance was reported as 22 g/L at 20 °C., pH 3.7. Concentration: 26.6 g/L at 20 °C. pKa = 9.15 at 20 °C. Boric oxide is the anhydride of boric acid. It is hydroscopic and takes up water to form boric acid. Therefore for practical purposes one part of boric oxide is equivalent to 1.776 parts of boric acid in aqueous solution.
pH of aqueous solution ranges from 6.1 at 0.056 % w/w boric oxide, equivalent to 3.7 at 2.66 % w/w boric oxide equivalent at 20 °C.