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EC number: 265-025-3 | CAS number: 64704-23-0
Density
Administrative data
- Endpoint:
- relative density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 09 February 2018 - 20 March 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.3 (Relative Density)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 109 (Density of Liquids and Solids)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7300 (Density / Relative Density / Bulk Density)
- GLP compliance:
- no
- Type of method:
- other: gas comparison stereopycnometer
Test material
- Reference substance name:
- Disodium L-cystinate
- EC Number:
- 265-025-3
- EC Name:
- Disodium L-cystinate
- Cas Number:
- 64704-23-0
- Molecular formula:
- C6H10N2Na2O4S2.H2O
- IUPAC Name:
- disodium (2R)-2-amino-3-{[(2R)-2-amino-2-carboxyethyl]disulfanyl}propanoate
- Test material form:
- solid: particulate/powder
Constituent 1
Results and discussion
Density
- Key result
- Type:
- relative density
- Density:
- ca. 1.63
- Temp.:
- 20 °C
Any other information on results incl. tables
Interpretation: The density (ρ) of a substance is the quotient of its mass and its volume and is expressed in SI units of kg/m3. The relative density ( ) is the ratio between the mass of a volume of a substance to be examined, determined at 20°C, and the mass of the same volume of water, determined at 4°C ( = 1000 kg/m3). The relative density has no dimension.
Density ρ = m/V [g/cm3]
Where:
m: mass of the test item [g]
V: volume of the test item [cm3]
Results: The results of the tests on the determination of the density of
the test item are given in the table below. The individual measurements
were obtained with an accuracy of < 0.02 g/cm3. According
to the guideline, the density of the test item is given as the mean
value.
Density of the Test Item
|
Test 1 |
Test 2 |
Mean |
Density [g/cm3] |
1.626 |
1.624 |
1.63 |
Applicant's summary and conclusion
- Conclusions:
- A gas comparison stereopycnometer was used for the determination of the density and relative density of Disodium L-cystinate. The density of the test item at 20ºC was 1.63 g/cm3 (1.63 x 103 kg/m3). The relative density was 1.63.
- Executive summary:
A gas comparison stereopycnometer was used for the determination of the density and relative density of Disodium L-cystinate. The density of the test item at 20ºC was 1.63 g/cm3(1.63 x 103kg/m3). The relative density was 1.63.
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