Disodium 3(or 5)-[[4-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-1-naphthyl]azo]salicylate

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Deviations:

no

GLP compliance:

no

Type of method:

pycnometer method

Key result

Type:

relative density

Density:

1.191

Temp.:

20 °C

Parameter	1^stdetermination	2^nddetermination	Average
Weight of empty pycnometer	19.45233	18.08131
Weight of pycnometer with test substance	29.27598	28.44389
Weight of solid test substance	9.82365	10.36258
Weight of pycnometer with sample and n-heptane	40.92552	39.92028
Weight of pycnometer with n-heptane	36.71453	35.52423
Density of n-heptane	0.68289	0.68284	0.68287
Density of solid substance	1.1952	1.1859	1.1906
Relative density of solid substance	-	-	1.191

Conclusions:

Relative density of the test substance, Direct Black 51, is 1.191; uncertainty of determination was estimated to 0.008.

Executive summary:

The density of the test substance, Direct Black 51, was measured. The pycnometer method was used. The procedure was performed according to the Method A.3, Relative density, Council Regulation (EC) No.440/2008, published in O.J. L 142, 2008.

Relative density of the test substance, Direct Black 51, is 1.191; standard uncertainty is 0.008.

Test temperature was 20 ± 0.1°C.

Key value for chemical safety assessment

Relative density at 20C:

1.191