Aluminum chloride hydroxide sulfate

Dissociation constant

Administrative data

Endpoint:

dissociation constant

Type of information:

other: Publication

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Data source

Reference

Reference 1

Reference Type:

publication

Title:

Unnamed

Year:

1983

Reference 2

Reference Type:

other company data

Title:

Unnamed

Year:

1996

Report date:

1996

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 112 (Dissociation Constants in Water)

Version / remarks:

12 May 1981

Deviations:

yes

Remarks:

for high basicity CFS10Al

Principles of method if other than guideline:

In Attachment file "water soluble aluminium salts" there is an opportunity for alternative dissociation constants. This dependence reflects the relationship between the data in Table 2 (blue) and products synthesized by us with numbers 2 to 7 in Table 3 As we have shown, the basicity of the solutions we investigate can easily be calculated on the analytical data for the composition.
Find dependency: pK = 1,4478.a+5,0668 оr pK = -1,4478.Mo + 13,753
(R² = 0,9821)
This is an opportunity to determine the value of the dissociation constant with sufficient confidence.
This is particularly useful in the case of high basicity and highly concentrated polyaluminum salt solutions for which standard potentiometric titration methods is not aplicable.

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Aluminum chloride hydroxide sulfate

EC Number:

254-400-7

EC Name:

Aluminum chloride hydroxide sulfate

Cas Number:

39290-78-3

Molecular formula:

generic molecular formula Al(OH)xCl(3-x-2y)(SO4)y, where 0.6

IUPAC Name:

dialuminium(3+) dichloride dihydroxide sulfate

Test material form:

liquid

Results and discussion

Dissociating properties:

yes

Dissociation constant

Dissociation constant 1

No.:

#1

pKa:

8.3

Temp.:

25 °C

Remarks on result:

other: calculated

Dissociation constant 2

No.:

#2

pKa:

8.45

Temp.:

25 °C

Remarks on result:

other: calculated

Dissociation constant 3

No.:

#3

pKa:

8.58

Temp.:

25 °C

Remarks on result:

other: calculated