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Administrative data

Endpoint:
pH
Type of information:
experimental study
Adequacy of study:
key study
Study period:
14 APR 2003 to 05 JUN 2003
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Cross-referenceopen allclose all
Reason / purpose for cross-reference:
reference to same study
Reference
Endpoint:
bulk density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
14 APR 2003 - 05 JUN 2003
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Deviations:
not specified
GLP compliance:
yes
Type of method:
air comparison pycnometer (for solids)
Type:
bulk density
Density:
1 838 kg/m³
Temp.:
21.5 °C

The pressure readings (P1 and P2) and the calculated volume for the calibration ball:

Determination

P1

P2

Volume (cm3)

Certified volume (cm3)

Tolerance (cm3)

A

17.442

8.633

56.4

56.6

± 0.5

B

17.138

8.483

56.4

56.6

± 0.5

The pressure readings calculated volumes and density values obtained for the test material:

Determination

P1

P2

Volume

(cm3)

Density

(kg/m3)

A

17.117

7.708

38.2

1842.6

B

17.115

7.725

38.7

1833.6

Temperature: 21.5 ± 0.5 ºC

Mean density: 1838.1 kg/m3

Conclusions:
The density of the test material was determined to be 1838.1 kg/m3 (1.8381 kg/L) at 21.5 ± 0.5 ºC.
Executive summary:

In a GLP study according to OECD Guideline 109 the density of the test item was determined with an air comparison pycnometer to be 1.8381 kg/L at 21.5 °C.

Reason / purpose for cross-reference:
reference to same study
Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
14 APR 2003 - 05 JUN 2003
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
not specified
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Melting / freezing pt.:
> 633 K

Thermographic data - determination 1:

Thermal event

Interpretation

Temperature

ºC

K

Endotherm

Loss of free water

~100

~373

Small endotherms

Possible loss of water

of crystallisation

~140 to 160

~413 to 433

Thermographic data - determination 2:

Thermal event

Interpretation

Temperature

ºC

K

Endotherm

Loss of free water

~100

~373

Small endotherms

Possible loss of water

of crystallisation

~140 to 160

~413 to 433

Overall melting point: > 633 K

Conclusions:
The melting point of the test material was determined to be greater than 633 K (906 °C)
Executive summary:

The melting point of the test item was assessed in a GLP study according to OECD Guideline 102 via differential scanning calometry. The melting point is higher than 906 °C.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2003

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7000 (pH)
Deviations:
not specified
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Diboron trioxide
EC Number:
215-125-8
EC Name:
Diboron trioxide
Cas Number:
1303-86-2
Molecular formula:
B2O3
IUPAC Name:
bicyclo[1.1.1]diboroxane
Details on test material:
- Name of test material: Boric oxide
- Physical state: White powder
- Lot/batch No.: BRt 2638
- Storage condition of test material: Room temperature in the dark

Results and discussion

pH value
pH value:
5.46
Temp.:
25 °C
Concentration:
1 vol%
Remarks on result:
other: aqueous dispersion

Any other information on results incl. tables

The pH of the 1 % aqueous dispersions:

Determination

Reading

Temperature

ºC

pH

Mean

pH

Overall

Mean pH

A

1

25

5.44

5.44

5.46

2

25

5.44

B

1

25

5.48

5.48

2

25

5.48

pH of distilled water used in the sample preparation was 5.10 to 5.23.

Applicant's summary and conclusion

Conclusions:
The pH of a 1 % aqueous dispersion of test material was determined to be 5.46 at 25 ºC.
Executive summary:

In a GLP study according to EPA OPPTS 830.7000 the pH value of the test item was determined: The pH of a 1 % aqueous dispersion of test material was determined to be 5.46 at 25 ºC.