Reaction mass of Silicic acid, calcium salt and Silicic acid, magnesium salt

Water solubility

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

water solubility

Type of information:

other: Quartzene CMS - SDS

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Principles of method if other than guideline:

Metod not specified.

Type of method:

other: See "Remarks"

Remarks:

Not specified.

Key result

Water solubility:

< 200 mg/L

Temp.:

25 °C

Remarks on result:

other: See "Remarks"

Remarks:

pH not specified.

Conclusions:

Solubility in water at 25 degree Celcius: <200 mg/L.

Reference 2

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1998

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Remarks:

Reliability according to OECD SIDS (2004).

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Version / remarks:

Directive 92/69/EEC, A6

GLP compliance:

no

Type of method:

column elution method

Remarks:

In German: "Kolben methode"

Specific details on test material used for the study:

Silicic acid, calcium salt (CAS-nr: 1344-95-2). Calsil B.

Key result

Water solubility:

ca. 260 mg/L

Conc. based on:

element

Incubation duration:

>= 48 - <= 96 h

Temp.:

30 °C

pH:

ca. 9.7

Remarks on result:

other: See "Remarks"

Remarks:

Ca 1 g was stirred in 150 ml water.

Conclusions:

Water solubility of calcium silicate was determined to ca. 260 mg/l at 20 °C.

Executive summary:

Water solubility of calcium silicate was determined using the method according to Directive 92/69/EEC, A.6. Watersolubility at 20 °C was determined to ca. 260 mg/l.

Reference 3

Endpoint:

water solubility

Type of information:

other: Quartzene CMS - SDS

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Principles of method if other than guideline:

Not measured, not applicable.

Type of method:

other: See "Remarks"

Remarks:

Not mesured, not applicable.

Key result

Remarks on result:

not measured/tested

Remarks:

Water solubility: not applicable.

Conclusions:

Water solubility: not applicable for CMS paste.

Reference 4

Endpoint:

water solubility

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Remarks:

Reliability according to OECD SIDS (2004)

Justification for type of information:

1. HYPOTHESIS FOR THE ANALOGUE APPROACH
Due to sharing similar structural, physical and chemical properties to CMS, synthetic amorphous silica is considered appropriate for read-across purposes.

Reason / purpose for cross-reference:

read-across source

Reason / purpose for cross-reference:

read-across source

Reason / purpose for cross-reference:

read-across source

Key result

Water solubility:

ca. 260 mg/L

Temp.:

20 °C

pH:

9.7

Conclusions:

Based on an analogue read across approach from synthetic calcium silicate, the water solubility of CMS powder is estimated to be approximately 260 mg/L. Water solubility of the paste form of CMS: not applicable.

Description of key information

Solubility for CMS in water at 20-25 degree Celcius is estimated to be <260 mg/L.

Water solubility for the paste form of CMS: not applicable.

Key value for chemical safety assessment

Water solubility:

200 mg/L

at the temperature of:

25 °C