Registration Dossier
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EC number: 202-684-8 | CAS number: 98-59-9
Storage stability and reactivity towards container material
Administrative data
Link to relevant study record(s)
- Endpoint:
- storage stability and reactivity towards container material
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- November 2011
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Well conducted study, according to UN recommendations, certificate of analysis included.
- Qualifier:
- according to guideline
- Guideline:
- other: Recommendations on the transport of dangerous goods, Manual of tests and criteria, United Nations, New York and Geneva, Rev.5, 2009.
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- other: the uniform and pitting corrosion
- Results:
- Carbon steel SAE 1020
The corrosion rates of SAE 1020 in the liquid phase are above the corrosion threshold of 6.25 mm/year in p-TSC
Aluminium 7075 T6
The corrosion rates of Aluminium 7075 T6 in the liquid phase are above the corrosion threshold of 6.25 mm/year in p-TSC.
The maximum intrusion depth of the pits, exposed in the vapour phase is <120 µm. - Conclusions:
- According to the criteria in the UN Standard mentioned above aqueous p-TSC should be classified as corrosive.
Reference
An overview of the results is given for C-Steel and Aluminium in tables below.
Corrosion rates and observations after the exposition test of C-Steel SAE 1020
PTSC |
Phase |
Mass t=0 (g) |
Mass t=end (g) |
Mass difference (mg) |
C-steel SAE 1020 Average corrosion rate [mm/year] |
C-steel SAE 1020
Mass loss [%] |
Observations |
Vapor |
14.9503 |
14.5301 |
420 |
1.4 |
2.8 |
Surface, light brown coloring |
|
Vapor/Liquid |
14.6521 |
11.8417 |
2810 |
9.2 |
19 |
Surface, dark brown coloring |
|
Liquid |
14.7096 |
1.3892 |
13320 |
44 |
91 |
Surface, dark brown coloring |
Corrosion rates and observations after the exposition tests of aluminum 7075 T6
PTSC |
Phase |
Mass t=0 (g) |
Mass t=end (g) |
Mass difference (mg) |
Aluminium 7075 Average corrosion rate [mm/year] |
Aluminium 7075 Average Mass loss [%] |
Observations |
Vapor |
5.0393 |
5.0230 |
16 |
0.2 |
0.3 |
White, yellow colouring, pitting |
|
Vapor/Liquid |
5.0649 |
2.6024 |
2463 |
23 |
49 |
White, yellow colouring, pitting in the vapour phase. |
|
Liquid |
5.0291 |
0.0000 |
5029 |
47 |
100 |
Dissolved |
The corrosion form is uniform, except the coupon exposed in the vapor/liquid phase, this contains pitting in the vapour part. The minimum intrusion depth of aluminum is lower than the given threshold 120μm.
Description of key information
According to the criteria in the UN Standard aqueous p-TSC should be classified as corrosive.
Additional information
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