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EC number: 240-383-3 | CAS number: 16291-96-6 An amorphous form of carbon produced by partially burning or oxidizing wood or other organic matter.
Water solubility
Administrative data
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2010-6-28 to 2010-10-29
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: The study was conducted in accordance with EC directive 440/2008, method A.6 "water solubility"
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- Deviations:
- yes
- Remarks:
- Deionised water with TOC <1 ppm and conductivity below 0.1 µS/cm was used
- Principles of method if other than guideline:
- The column elution method is based on the elution of a test substance with water from a micro-column which is filled with the test material. The water solubility is given by the mass concentration of the eluate when this has reached a plateau as a function of time. For the determination of charcoal, a HPLC column was filled with 700 mg of the test item and eluted with a continuous flow of 25 mL/h. The first column volumes were discarded and then seven fractions were collected and determined by the analysis of total carbon (TC) using a carbon analyser.
- GLP compliance:
- no
- Type of method:
- column elution method
Test material
- 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 1: C-Fix = 73.3%)
Batch no.: 19062009 1PP
Appearance: Charcoal typic
Composition: Charcoal, carbon content in the test item 85.6% (elementary analysis)
CAS-no.: 16291-96-6
EINECS-no.: 240-383-3
Purity: C-Fix: 73.3%
Expiry date: Dec. 2030
Storage: Room temperature 20±5 °C, keep away from humidity
Preparation:
20 g of the test item charcoal was finely ground and the fraction 100-500 µm was used fort the test.
Constituent 1
Results and discussion
Water solubility
- Water solubility:
- < 1 mg/L
- Temp.:
- 21.3 °C
- Details on results:
- All measurements lay below the limit of quantification (LOQ) of total carbon (TC) (1.87 mg/L).
Deviation from study plan:
A temperature of 21.3±0.2 °C instead of 20.0±0.5 °C was considered as uncritical due to the low solubility measured.
Any other information on results incl. tables
Medidas en el caudal de 24,68 ml / h
Muestra |
TC [mg / l] |
* TC del producto de ensayo [%] |
La concentración del producto de ensayo [mg / l] |
pH |
1 |
2,88 |
85,6 |
3,36 |
6 |
2 |
1,77 (<LC) |
85,6 |
<LC |
6 |
3 |
1,41 (<LC) |
85,6 |
<LC |
6 |
4 |
0,91 (<LC) |
85,6 |
<LC |
6 |
5 |
0,82 (<LC) |
85,6 |
<LC |
6 |
6 |
1,11 (<LC) |
85,6 |
<LC |
6 |
7 |
0,63 (<LC) |
85,6 |
<LC |
6 |
Medidas en el caudal de 12,64 ml / h
Muestra |
TC [mg / l] |
* TC del producto de ensayo [%] |
La concentración del producto de ensayo [mg / l] |
pH |
8 |
0,74 (<LC) |
85,6 |
<LC |
6 |
9 |
0,87 (<LC) |
85,6 |
<LC |
6 |
10 |
0,96 (<LC) |
85,6 |
<LC |
6 |
11 |
0,96 (<LC) |
85,6 |
<LC |
6 |
12 |
1,06 (<LC) |
85,6 |
<LC |
6 |
13 |
1,13 (<LC) |
85,6 |
<LC |
6 |
14 |
0,88 (<LC) |
85,6 |
<LC |
6 |
* El TC (carbono total) del producto de ensayo se midió mediante análisis elemental (no dentro de este estudio, el valor fue proporcionada por el monitor.)
El valor de la muestra 1 fue considerado como atípico. El experimento fue terminado después de 14 fracciones consecutivas.
13 de los 14 valores de medición estaba por debajo del límite de cuantificación (LDC) de carbono total (CT) (1,87 mg / L).
El único valor que está por encima del límite de cuantificación fue considerado como atípico.
La concentración del producto de ensayo se calculó por lo tanto, desde el límite de cuantificación de TC y el contenido de carbono del producto de ensayo como <2,18 mg / l
Los valores del contenido de TC ponen por encima del límite de detección de 0,5 mg / l La media de estos valores estaba por debajo de 1 mg / l, calculado con el valor 4 -14. Valor 1 -3 no son elegidos para cálculo de la media, ya que estaba fuera del equilibrio de acuerdo a la directriz (diferencia> 30%).
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information): slightly soluble (0.1-100 mg/L)
The water solubility of charcoal (Probe 1: C-Fix = 73.3%) was <1.0 mg/L at 21.3±0.2°C.
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