(aminoalkyl) hydrogen thiosulfate

Additional physico-chemical information

Administrative data

Endpoint:

additional physico-chemical information

Type of information:

experimental study

Adequacy of study:

key study

Study period:

17 June 2014 - 05 September 2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP-compliant study in accordance with UN-MTC Section 37.4.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2014

Report Date:

2014

Materials and methods

Test guideline

Qualifier:

according to

Guideline:

other: UN no. ST/SG/AC.10/11/Rev.5: Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, Part III Section 37.4 “Test Methods for Corrosion to metals" (2009)

Deviations:

no

Principles of method if other than guideline:

UN MTC Section 37.4.1.1 -Test C.1: "Test for determining the corrosive properties of liquids and solids that may become liquid during transport as dangerous goods of Class 8, packing group III"

GLP compliance:

yes (incl. certificate)

Endpoint investigated:

other: corrosive to metals

Test material

Reference

Name:

Unnamed

Type:

Constituent

Test material form:

solid: particulate/powder

Remarks:

migrated information: powder

Details on test material:

- Name of test material (as cited in study report): [trade name given]
- Substance type: mono-constituent
- Description: white powder
- Storage condition of test material: at room temperature in the dark

Results and discussion

Results:

Uniform corrosion
The aluminium plates show a white residue on the plate (Specimen 1), the steel plates show a brown/black or dark grey residue on the plates (Specimen 1 and 2) and on and above the bottom of the glass receptacles a brown deposit was observed. Because the weight loss of the aluminum and steel plates was < 13.5%, the test was considered negative.

Localized corrosion
Localized corrosion was observed on two aluminium plates (Specimen 1 and Specimen 2). The depth of the deepest hole obtained with Specimen 1 was measured in ten-fold using a Surface Profile Gauge (PCWI International, Australia). The mean depth (n=10) was 54 µm (coefficient of variation: 2%). Because the mean depth of the aluminum plate was < 120 µm, the test was considered negative.

Any other information on results incl. tables

Uniform corrosion - weight loss of aluminum plates

	Specimen 1	Specimen 2	Specimen 3	Reference
Weight at the start of the test [g]	5.4425	5.4487	5.4258	-
Weight at the end of the test after removal of corrosion products using pickling solution [g]	5.4404	5.4474	5.4247	-
Weight before treatment pickling solution [g]	-	-	-	5.4336
Weight after treatment pickling solution [g]				5.4324
Weight loss [%]	0.017	0.0018	-0.0018

Uniform corrosion - weight loss of steel plates

	Specimen 1	Specimen 2	Specimen 3	Reference
Weight at the start of the test [g]	14.9749	14.9846	15.0905	-
Weight at the end of the test after removal of corrosion products using pickling solution [g]	14.8239	14.8141	15.0507	-
Weight before treatment pickling solution [g]	-	-	-	14.9866
Weight after treatment pickling solution [g]	-	-	-	14.9853
Weight loss [%]	1.0	1.1	0.26	-

Applicant's summary and conclusion

Conclusions:

In a GLP-compliant study performed in accordance with UN-MTC Section 37.4 (Test C.1), the corrosion to metals of the substance was determined at 55°C and a 7-day test period using 2 mm aluminium and steel plates (Test C.1). All weight losses (uniform corrosion) were < 13.5% (i.e. equivalent to 6.25 mm/year corrosion rate) and the mean depths of the deepest holes (localized corrosion) were < 120 µm. The test substance is therefore considered to be not corrosive to aluminium and steel.

The test substance does not need to be classified as 'corrosive to metals' according to the CLP Regulation.