Charcoal

Density

Administrative data

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2010-6-28 to 2010-10-28

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The study was conducted in accordance with EC directive 440/2008, method A.3 "density", dated 31. May 2008 under the GLP compliance.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Deviations:

no

Principles of method if other than guideline:

The measurement of the relative density of test substance charcoal (Probe 3: C-Fix = 88.7%), was carried out in duplicate using 50 mL pycnometers and the average value taken as the result.

GLP compliance:

no

Type of method:

pycnometer method

Test material

Test material information

Constituent 1

Reference substance name:

Charcoal

EC Number:

240-383-3

EC Name:

Charcoal

Cas Number:

16291-96-6

IUPAC Name:

Carbón vegetal

Details on test material:

Name: Charcoal (Probe 3: C-Fix = 88.7%)
Batch no.: DP 07.2008/1
Appearance: Charcoal typic
Composition: Charcoal
CAS no.: 16291-96-6
EINECS-no.: 240-383-3
Purity: C-Fix: 88.7%
Expiry date: Dec. 2030
Storage: Room temperature 20±5° C, keep away from humidity

Results and discussion

Density

Type:

relative density

Density:

ca. 1.455

Temp.:

20 °C

Any other information on results incl. tables

Measured values

First determination
Temperature	20.2	°C			0.1 °C
Density of water	0.998203	g/cm^3		2.00%	0.0002
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	42.1436	92.9290	92.9541	50.4637	95.5722
Temperature in °C	20.0	20.2	19.8	20.2	20.0
Volume of pycnometer	50.8768	cm^3
Density of replacement liquid	0.9987	g/cm^3
Density of test item	1.4573	g/cm^3
Relative error delta rho	0.0306%
Absolute error delta m	0.0004 g/cm^3
Second determination
Temperature	19.9	°C			0.1
Density of water	0.998203	g/cm^3		2.00%	0.0002
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	42.1423	92.9273	92.9531	50.1546	95.4599
Temperature in °C	20.0	19.9	19.8	20.0	19.8
Volume of pycnometer	50.8764	cm^3
Density of replacement liquid	0.9987	g/cm^3
Density of test item	1.4534	g/cm^3
Relative error delta rho	0.0316%
Absolute error delta m	0.0005 g/cm^3

 

Density of test item

The density rho_s of the solid test item was calculated as follows:

  rho_S=  (m₄- m₁) / ((m₃- m₁) - (m₅- m₄)) x rho_Verd

with

rho_s= density of solid test item in g/cm³ 
m₁ = mass of empty pycnometer in g 
m₃ = mass of pycnometer with replacement liquid in g

m₄ = mass of pycnometer with solid test item in g

m₅ = mass of pycnometer with solid test item, filled up with replacement liquid in g

rho_Verd= density of replacement liquid in g/cm³

 

The relative density d of the test item has the same number value, but no unit (calculated through division of density rho_sby the density of H₂O at 4°C).

 

Density of replacement liquid is:

rho_Verd= (m₃- m₁) / (m₂- m₁) x rho_H2O

 

with

rho_Verd = density of replacement liquid in g * cm^-3 
m₁ = mass of empty pycnometer in g 
m₂ = mass of pycnometer with water in g

m₃ = mass of pycnometer with replacement liquid in g

rho_H2O = density of water at test temperature

Results of single determinations

Determination	Density in g/cm^3	Absolute error delta min g/cm^3
1	1.4573	0.0004
2	1.4534	0.0005

 

Results – mean values

Parameter	Value	Unit	Standard Deviation
Volume of pycnometer	50.88	cm^3	0.0003
Density of test item rhos	1.4554	g/cm^3	0.0027
Density of test item rhos	1455.4	kg/m^3	2.7
Relative density of test item d	1.4554		0.0027

 

Applicant's summary and conclusion

Conclusions:

The relative density of charcoal (Probe 3: C-Fix = 88.7%) was calculated as 1.4554 at 20±0.2 °C.