Ashes (residues), cenospheres

Water solubility

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

other information

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

other: only short abstract available

Principles of method if other than guideline:

House method of the testing Laboratory
Title: Determination of matter soluble in water – Cold extraction method

GLP compliance:

no

Type of method:

flask method

Water solubility:

0.13 other: %

Remarks on result:

other: water soluble matter of Fillite Grey Kazakhstan ADD

Water solubility:

0.26 other: %

Remarks on result:

other: water soluble matter of Fillite U.K ADD

Water solubility:

0.19 other: %

Remarks on result:

other: water soluble matter of Fillite Chinese ADD

Water solubility:

0.05 other: %

Remarks on result:

other: water soluble matter of Fillite Indian ADD

Water solubility:

0.04 other: %

Remarks on result:

other: water soluble matter of Fillite White Kazakhstan ADD

Water solubility:

0.01 other:

Remarks on result:

other: water soluble matter of Fillite Russian ADD

The water solubility is expressed by the leachability of the water soluble components of the cenospheres, fly, alumo silicate in water.

Temperature and pH value are not given.

Reference 2

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP-Guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Deviations:

yes

Remarks:

: The test item is a complex product of oxides.

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Deviations:

yes

Remarks:

: The test item is a complex product of oxides.

Principles of method if other than guideline:

The water soluble matter of the test item was determined by gravimetric method.

GLP compliance:

yes (incl. QA statement)

Type of method:

flask method

Water solubility:

0.068 g/L

Temp.:

20 °C

pH:

9.33

Remarks on result:

other: 0.068 g/L is equivalent to 2.3 g/kg (0.23 % (w/w) water soluble matter)

Details on results:

Temperature: 20 °C +/- 5 °C

Gravimetric determination of the soluble components at 20 °C in water

Sampling Time	Soluble components
[h]	[mg/kg]
0 *	2268
24	2268
48	2222
Mean ± RSD [%]	2253 ± 1

* after 96 h pre-equilibration

Analytical Samples and Individual Results of the Main Test (Determination by Gravimetry)

Gravimetric determination after 96 h equilibration (t=0)

Initial weight	Flask before evaporation	Aliquot	Flask after evaporation	Residue	Soluble components per Liter	Soluble comp. per kg test item
[g]	[g]	[ml]	[g]	[g]	[mg/L]	[mg/kg Fillite]
60.121	128.5678	300	128.5878	0.0200	66.7	2218
60.410	128.3233	300	128.3429	0.0196	65.3	2163
60.351	129.1192	300	129.1397	0.0205	68.3	2265
60.283	128.2199	300	128.2421	0.0222	74.0	2455
60.115	130.8117	300	130.8319	0.0202	67.3	2240
Mean ± RSD ( ± %)				0.02 ± 5	68.3 ± 5	2268 ± 5

 

Gravimetric determination after 120 h equilibration (t=24h)

Initial weight	Flask before evaporation	Aliquot	Flask after evaporation	Residue	Soluble components per Liter	Soluble comp. per kg test item
[g]	[g]	[ml]	[g]	[g]	[mg/L]	[mg/kg Fillite]
60.121	130.1577	300	130.1778	0.0201	67.0	2229
60.410	129.8234	300	129.8429	0.0195	65.0	2152
60.351	129.3594	300	129.3797	0.0203	67.7	2242
60.283	130.2796	300	130.3018	0.0222	74.0	2455
60.115	128.8215	300	128.8419	0.0204	68.0	2262
Mean ± RSD ( ± %)				0.021 ± 5	68.3 ± 5	2268 ± 5

 

Gravimetric determination after 144 h equilibration (t=48h)

Initial weight	Flask before evaporation	Aliquot	Flask after evaporation	Residue	Soluble components per Liter	Soluble comp. per kg test item
[g]	[g]	[ml]	[g]	[g]	[mg/L]	[mg/kg Fillite]
60.121	127.8678	300	127.8875	0.0197	65.7	2184
60.410	130.6230	300	130.6425	0.0195	65.0	2152
60.351	131.2552	300	131.2757	0.0205	68.3	2265
60.283	130.7696	300	130.7901	0.0205	68.3	2267
60.115	131.5437	300	131.5639	0.0202	67.3	2240
Mean ± RSD ( ± %)				0.02 ± 2	66.9 ± 2	2222 ± 2

 

Please note: The value for the soluble components per Liter is not representative for the test item. It belongs to the test conditions using 2000 mL test medium and 60 g test item. If more test item or less test media is used, this value can be higher.

Reference 3

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP-Guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Deviations:

yes

Remarks:

: The test item is a complex product of oxides.

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Deviations:

yes

Remarks:

: The test item is a complex product of oxides.

Principles of method if other than guideline:

The water soluble matter of the test item was determined by gravimetric method.

GLP compliance:

yes (incl. QA statement)

Type of method:

flask method

Water solubility:

0.051 g/L

Temp.:

20 °C

pH:

9.33

Remarks on result:

other: 0.051 g/L is equivalent to 1.7 g/kg (0.17 % (w/w) water soluble matter)

Details on results:

Temperature: 20 °C +/- 5 °C

Gravimetric determination of the soluble components at 20 °C in water

Sampling Time	Soluble components
[h]	[mg/kg Fillite RGW]
0 *	1680
24	1680
48	1682
Mean ± RSD [%]	1681 ± 0

·        after 96 h pre-equilibration

·         

             Analytical Samples and Individual Results of the Main Test (Determination by Gravimetry)

Gravimetric determination after 96 h equilibration (t=0)

Initial weight	Flask before evaporation	Aliquot	Flask after evaporation	Residue	Soluble components per Liter	Soluble comp. per kg test item
[g]	[g]	[ml]	[g]	[g]	[mg/L]	[mg/kg Fillite]
60.041	128.2199	300	128.2351	0.0152	50.7	1688
60.189	130.8117	300	130.8279	0.0162	54.0	1794
60.054	131.4785	300	131.4940	0.0155	51.7	1721
60.009	127.6299	300	127.6451	0.0152	50.7	1689
60.176	128.3883	300	128.4019	0.0136	45.3	1507
Mean ± RSD ( ± %)				0.015 ± 6	50.5 ± 6	1680 ± 6

 

Gravimetric determination after 120 h equilibration (t=24h)

Initial weight	Flask before evaporation	Aliquot	Flask after evaporation	Residue	Soluble components per Liter	Soluble comp. per kg test item
[g]	[g]	[ml]	[g]	[g]	[mg/L]	[mg/kg Fillite]
60.041	127.2199	300	127.2351	0.0152	50.7	1688
60.189	131.5117	300	131.5279	0.0162	54.0	1794
60.054	128.4785	300	128.494	0.0155	51.7	1721
60.009	127.5299	300	127.5451	0.0152	50.7	1689
60.176	127.8883	300	127.9019	0.0136	45.3	1507
Mean ± RSD ( ± %)				0.015 ± 6	50.5 ± 6	1680 ± 6

 

Gravimetric determination after 144 h equilibration (t=48h)

Initial weight	Flask before evaporation	Aliquot	Flask after evaporation	Residue	Soluble components per Liter	Soluble comp. per kg test item
[g]	[g]	[ml]	[g]	[g]	[mg/L]	[mg/kg Fillite]
60.041	131.6198	300	131.6351	0.0153	51.0	1699
60.189	130.7117	300	130.7279	0.0162	54.0	1794
60.054	130.4781	300	130.494	0.0159	53.0	1765
60.009	130.5297	300	130.5441	0.0144	48.0	1600
60.176	128.8886	300	128.9026	0.0140	46.7	1551
Mean ± RSD ( ± %)				0.015 ± 6	50.5 ± 6	1682 ± 6

 

 

Please note: The value for the soluble components per Liter is not representative for the test item. It belongs to the test conditions using 2000 mL test medium and 60 g test item. If more test item or less test media is used, this value can be higher.

 

Description of key information

0.051-0.068 g/L (0.17%-0.23%; w/w)

Key value for chemical safety assessment

Water solubility:

0.051 g/L

at the temperature of:

20 °C

Additional information

Main components are not soluble in water; soluble fraction contains mostly calcium, potassium, sodium, magnesium compounds.