Registration Dossier

Physical & Chemical properties

Water solubility

Currently viewing:

Administrative data

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Guideline study with acceptable restrictions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1998
Report date:
1998

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.6 (Water Solubility)
Version / remarks:
Cited as Directive 92/69/EEC, A.6
GLP compliance:
no
Type of method:
flask method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): P 820 A
SIPERNAT 820 A
- Composition (analytical data after ignition): 82 % SiO2, 8 % Na2O, 9.5 % Al2O3
SiO2 approx. 82 %, Al approx. 5.6 % (as element), Na approx. 5.9 % (as element)
- Degree of Purity: ~99 %
- Substance type: inorganic
- Physical state: solid
-loss on ignition (2 h, 1000 °C): 14.2 +-0.1 % (w/w)

Results and discussion

Water solubility
Water solubility:
ca. 68 - ca. 79 mg/L
Temp.:
20 °C
pH:
ca. 9
Details on results:
Concentration/loading: 6660 mg/L at 30 °C
The pH was inherent and not adjusted.
The indicated value range is the total of measured elements.

Any other information on results incl. tables

Solubility in water of a sodium aluminum silicate at 20 °C, pH 9

48 h

72 h

96 h

SiO2  [mg/L]

35 ±2

42 ±3

42 ±3

Na+ [mg/L ]

33 ±2

35 ±2

36 ±2

Al3+ [mg/L]

0.33 ±0.04

0.58 ±0.06

0.61 ±0.07

Overall solubility was about 68 - 79 mg/L.


Applicant's summary and conclusion