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Physical & Chemical properties

Storage stability and reactivity towards container material

Administrative data

Endpoint:
storage stability and reactivity towards container material
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The study was not carried out under GLP conditions but followed a guideline (NACE standard TM 0169-95). It is well documented.

Data source

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

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: NACE standard TM 0169-95
Deviations:
no
Principles of method if other than guideline:
Corrosivity to container material was tested with test substance (5 % deionised water added) at 55 °C for seven days on aluminium alloy (AlZnMgCu 1,5) and unalloyed steel placed in the moistened test material
GLP compliance:
no
Type of method:
testing for reactivity towards container material

Test material

Constituent 1
Chemical structure
Reference substance name:
Disodium carbonate, compound with hydrogen peroxide (2:3)
EC Number:
239-707-6
EC Name:
Disodium carbonate, compound with hydrogen peroxide (2:3)
Cas Number:
15630-89-4
Molecular formula:
CH2O3.3/2H2O2.2Na
IUPAC Name:
disodium carbonate, compound with hydrogen peroxide (2:3)
Details on test material:
- Name of test material (as cited in study report): Natriumpercarbonat Q30
- Lot/batch No.: 301005808 - BB1
- Other: Sample no. SC-FE-AO Ov-O-497
Specific details on test material used for the study:
PACKAGING
- pieces of container materials (60x20 mm)
- aluminium alloy: W.Nr. 3.4365
- unalloyed steel: St 37, W.Nr. 1.0038 (ground), S235JRG2


TEST CONDITIONS
- Study duration: 7 days
- Temperature: 55 °C
- 5 % deionised water were added
- Sampling times: after test duration


Results and discussion

Results:
PRODUCT APPEARANCE
- no data

CONTAINER APPEARANCE
- Description of changes: localised abrasion and pitting corrosion (steel); etching of surface with localised abrasion

MASS CHANGES
- see Table

CHANGE IN ACTIVE INGREDIENTS
- Results: no data
Transformation products:
no

Any other information on results incl. tables

Table 1: Rates of abrasion determined for the two container materials

Test material

Container material

Sample no.

Abrasion

g·m-2·d-1

mm/a

Sodium percarbonate

Unalloyed steel

3

0.18

< 0.01

4

0.12

< 0.01

Aluminium alloy

3

0.40

0.054

4

0.47

0.064

Applicant's summary and conclusion

Conclusions:
The test material sodium percarbonate is not classified as corrosive towards container materials in accordance with the UN criteria for air and sea transportation.
Executive summary:

A test on corrosivity of sodium percarbonate towards container material was carried out in accordance with the NACE-standard TM 0169 -95 and the results of the test are considered as reliable with restrictions. Pieces of an aluminium alloy containing zinc, manganese and copper and unalloyed steel were placed in sodium percarbonate moistened with 5 % deionised water (two samples per material). The samples were stored in a board for seven days at 55 °C. The abrasion of material was evaluated after having cleaned the materials properly. The experimentally determined abrasion rates were 0.054 and 0.064 mm/a. A classification is required at values equal to or above 6.25 mm/a so that the substance was not classified as corrosive towards container materials in accordance with the UN criteria for air and sea transportation.

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