Nα-acetyl-DL-tryptophan

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

14 Aug 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Version / remarks:

adopted in 2012

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Version / remarks:

adopted in 2008

GLP compliance:

no

Type of method:

other: gas comparison pycnometer (for solids)

Specific details on test material used for the study:

Storage conditions: ambient temperature (10 to 30 °C), dry

Type:

relative density

Density:

1.39 other: dimensionless

Temp.:

20.5 °C

Results
Two test series with different weights were performed at ambient temperature (20.5 °C).

Table 1 – 1^stTest series results

Weight: 1.0834 g	p1 [psi]	p2 [psi]	Volume [cm^3]	DensityρPR[g/cm^3]
1^stmeasurement	19.543	10.538	0.7754	1.3973
2^ndmeasurement	19.554	10.545	0.7738	1.4001
3^rdmeasurement	19.584	10.561	0.7741	1.3996
Mean			0.77	1.40

 

Table 2 – 2^ndTest series results

Weight: 1.2158 g	p1 [psi]	p2 [psi]	Volume [cm^3]	DensityρPR[g/cm^3]
1^stmeasurement	19.516	10.451	0.8809	1.3802
2^ndmeasurement	19.528	10.456	0.8829	1.3770
3^rdmeasurement	19.558	10.473	0.8816	1.3791
Mean			0.88	1.38

 

The mean density is 1.39 g/cm³.

Conclusion: The relative density at ambient temperature was determined to be: D₄^R= 1.39

Executive summary:

The relative density was determined with a Micrometrics MultiVolume Pycnometer according to OECD guideline 109. The relative density compared to water at 4°C is 1.39 g/cm3.

Description of key information

Relative density: D4R= 1.39 at 20.5 °C (OECD 109, gas comparison pycnometer)

Key value for chemical safety assessment

Relative density at 20C:

1.39