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Physical & Chemical properties

Stability: thermal, sunlight, metals

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Endpoint:
stability: thermal, sunlight, metals, other
Remarks:
Migrated from section 'Stability: thermal, sunlight, metals'
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The study was well documented and meets generally accepted scientific principles, but was not conducted in compliance with GLP.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2000
Report date:
2000

Materials and methods

Principles of method if other than guideline:
Dequest products were heated at a high temperature
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
[ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, calcium sodium salt
EC Number:
287-370-9
EC Name:
[ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, calcium sodium salt
Cas Number:
85480-89-3
Molecular formula:
C6H20-2x-yN2O12P4.xCa.yNa
IUPAC Name:
[ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, calcium sodium salt

Results and discussion

For thermal stability study

Test substance thermally stable:
yes
Operating temperature
Operating temp.:
ca. 250 °C
Remarks on result:
other: 250 +/- 20°C
Transformation products:
yes
Identity of transformation products
No.:
#1
Reference
Reference substance name:
Unnamed
IUPAC name:
phosphine
Inventory number:
InventoryMultipleMappingImpl [inventoryEntryValue=EC 232-260-8]
CAS number:
7803-51-2

Any other information on results incl. tables

- DIP/MS

A small amount of phosphorous acid put in the DIP probe and run with the above mentionned program clearly shows the formation of phosphine. The three solid dequest grades were run under simiilar conditions and the phosphine formation is possible at low level.

- ATD/GC/MS

The formation of phosphine was observed

Applicant's summary and conclusion

Conclusions:
The test substance was observed to generate phosphine when heated to a high temperature of ~250°C.

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