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Physical & Chemical properties

Density

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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
Principles of method if other than guideline:
- Principle of test:
All procedures involving the pycnometer from wiping with the buckskin cloth to weighing were performed wearing cotton gloves. At all weighings, the corresponding temperature was recorded. All weighings were performed at 20.0 ± 0.4 °C. The determination was per-formed in duplicate
- Short description of test conditions:
The (cleaned) pycnometer was filled with replacement liquid, wiped again, and, after at least 10 minutes, weighed (M3). The pycnometer was then emptied, cleaned, and dried through rinsing with acetone and aeration with filtered air. Approx. 6 g of the ground test substance was filled into the pycnometer up to 2/3 of the volume of the pycnometer, the weight was recorded (M4). Then, replacement liquid was added to the mark and the pyc-nometer was weighed again (M5).
Before recording of the final weight, the pycnometer was set into an ultrasonic bath in order to remove any bubbles.


GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
pycnometer method
Key result
Type:
relative density
Density:
ca. 1.738 g/cm³
Temp.:
20 °C

The Test item was tested as delivered. Two test series with different weights were performed at ambient temperature (20.0 °C±0.24°C).

All measured values and the corresponding calculation results are given in the following table:

Table3‑a        Measured Values

First Determination

 

 

 

Error rel.

Error abs.

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

36.7404

61.5986

56.3974

42.3714

59.4715

Temperature in °C

19.8

19.6

20.0

20.0

20.0

Second Determination

 

 

 

Error rel.

Error abs.

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

36.7407

61.5968

56.3858

42.8443

59.7198

Temperature in °C

19.8

20.4

20.2

19.8

19.6

The following values were calculated.

Table4.‑a       Calculated Values

Parameter

Value

Unit

Standard Deviation

Relative Standard Deviation

Volume of Pycnometer

24.90

cm3

0.0022

0.01%

Density of Test Substance

1.7385

g/cm3

0.0001

0.00%

Density of Test Substance

1738.5

kg/m3

0.1

0.00%

Relative Density of

Test Substance

1.7385

 

0.0001

0.00%

Conclusions:
Using the pycnometer method, a density of 1.7385 ± 0.0011 g/cm3 at 20 ± 0.4 °C was measured. This value is the mean of two independent determinations with the maxi-mum error of a single determination.
Standard deviation was 0.0001 g/cm3, showing very good correlation of the two determi-nations.
Executive summary:

The density of Reactive Red Blendwell was determined using the picnometer method according to OECD 109 resp. EU A.3, the density was determined by mean of two test series at 20°.

Mean density for the two test series: 1.7385 ± 0.0011 g/cm3at 20±0.4 °C

Description of key information

Using the pycnometer method, a density of: : 1.7385 ± 0.0011 g/cm3at 20±0.4 °C was measured.

This value is the mean of two independent determinations with the maximum error of a single determination.

Standard deviation was 0.0001 g/cm3, showing very good correlation of the two determinations.

Key value for chemical safety assessment

Relative density at 20C:
1.738

Additional information


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