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EC number: 243-077-8 | CAS number: 19455-20-0
Density
Administrative data
- Endpoint:
- relative density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 20 - 21 February 2019
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 019
- Report date:
- 2019
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 109 (Density of Liquids and Solids)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- pycnometer method
Test material
- Reference substance name:
- Potassium isobutyrate
- EC Number:
- 243-077-8
- EC Name:
- Potassium isobutyrate
- Cas Number:
- 19455-20-0
- Molecular formula:
- C4H8O2.K
- IUPAC Name:
- potassium 2-methylpropanoate
- Test material form:
- solid: particulate/powder
Constituent 1
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material:
Sponsor / 18110908G
- Expiration date of the lot/batch:
31 Oct 2020
- Purity test date:
01 Nov 2018
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material:
Room Temperature (20 ± 5 °C); Keep away from humidity
- Stability under test conditions:
Stable
- Solubility and stability of the test substance in the solvent/vehicle:
Stability in solvents: H2O: 96h; EtOH: unknown; acetone: unknown; CH3CN: unknown; DMSO: unknown
Solubility in solvents: H2O: > 1 g/L; EtOH: unknown; acetone: unknown; CH3CN: unknown; DMSO: unknown
Results and discussion
Densityopen allclose all
- Key result
- Type:
- relative density
- Density:
- 1.328 other: no units
- Temp.:
- 20 °C
- Key result
- Type:
- density
- Density:
- 1.328 g/cm³
- Temp.:
- 20 °C
Any other information on results incl. tables
Measured Values
First Determination |
|
|
|
|
|
Weighing # |
m1 |
m2 |
m3 |
m4 |
m5 |
Item |
Pycn. empty |
Pycn.+ H2O |
Pycn. + repl.liq. |
Pycn. + test item |
Pycn. + test item + repl. liq. |
Mass in g |
38.0064 |
88.3718 |
77.7008 |
42.6495 |
79.5952 |
Temperature in °C |
20.0 |
20.0 |
20.2 |
20.0 |
20.2 |
Second Determination |
|
|
|
|
|
Weighing # |
m1 |
m2 |
m3 |
m4 |
m5 |
Item |
Pycn. empty |
Pycn.+ H2O |
Pycn. + repl.liq. |
Pycn. + test item |
Pycn. + test item + repl. liq. |
Mass in g |
38.0057 |
88.3756 |
77.6975 |
45.7694 |
80.8594 |
Temperature in °C |
20.0 |
20.0 |
20.2 |
20.0 |
20.2 |
Pycn. = Pycnometer;repl. liq.= replacement liquid
Calculated Values
First Determination |
|
|
Error rel. |
Error abs. |
Temperature |
20.0 |
°C |
|
0.1 |
Density of water |
0.998203 |
g/cm3 |
2.00% |
0,0002 |
Volume of Pycnometer |
50.4561 |
cm3 |
|
|
Density of Replacement Liquid |
0.7867 |
g/cm3 |
|
|
Density of Test Item |
1.3289 |
g/cm3 |
0.0593% |
0.0008 |
Second Determination |
|
|
Error rel. |
Error abs. |
Temperature |
20.0 |
°C |
|
0.1 |
Density of water |
0.998203 |
g/cm3 |
2.00% |
0.0002 |
Volume of Pycnometer |
50.4606 |
cm3 |
|
|
Density of Replacement Liquid |
0.7866 |
g/cm3 |
|
. |
Density of Test Item |
1.3271 |
g/cm3 |
0.0365% |
0.0005 |
rel. = relative; abs. = absolute
Results of the single determinations with the respective error as well as the mean value and its standard deviation are presented in the following tables:
Results of Single Determinations
Determination |
Density in g/cm3 |
Error of Determ. in g/cm3 |
1 |
1.3289 |
0.0008 |
2 |
1.3271 |
0.0005 |
Results – Mean Values
Parameter |
Value |
Unit |
Standard Deviation |
Relative Standard Deviation |
Volume of Pycnometer |
50.46 |
cm3 |
0.0032 |
0.01 % |
Density of Test Item |
1.3280 |
g/cm3 |
0.0013 |
0.10 % |
Density of Test Item |
1328.0 |
kg/m3 |
1.3 |
0.10 % |
Relative Density of Test Item |
1.3280 |
|
0.0013 |
0.10 % |
Note: All calculations are performed with unrounded values. Therefore, re-calculation with rounded values may lead to slightly different results.
Applicant's summary and conclusion
- Conclusions:
- The density of the test item Potassium isobutyrate was calculated as 1.3280 ± 0.0008 g/cm3 at 20.0 ± 0.2 °C, which is the mean of two values. Precision of the value is given as maximal error of a single determination.
Standard deviation was 0.0013 g/cm3, showing good correlation of the two determinations.
Therefore, the study is considered valid. - Executive summary:
Title of Study: Determination of the Density ofPotassium isobutyrate according to OECD 109 resp EU A.3
Findings and Results:
Using the pycnometer method, a density of
1.3280 ± 0.0008 g/cm3at 20.0±0.2 °C
was measured. This value is the mean of two independent determinations with the maximum error of a single determination.
Standard deviation was 0.0013 g/cm3, showing good correlation of the two determinations.
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