Nitrosylsulphuric acid

Oxidising properties

Administrative data

Endpoint:

oxidising liquids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

April 21, 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study was performed in accordance with the European Commission Regulation (EC) No. 440/2008 and EU Method A.21.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method A.21 (Oxidising Properties (Liquids))

Deviations:

no

Principles of method if other than guideline:

Not applicable.

GLP compliance:

no

Remarks:

Not required by the authority

Test material

Test material information

Constituent 1

Reference substance name:

Nitrosylsulphuric acid

EC Number:

231-964-2

EC Name:

Nitrosylsulphuric acid

Cas Number:

7782-78-7

Molecular formula:

HNO5S

IUPAC Name:

hydroxy(nitrosooxy)sulfane dioxide

Details on test material:

Identity: Confirmed by density
Storage: RT, dry
Expiry Date: November 20, 2011

Study design

Contact with:

powdered cellulose

Duration of test (contact time):

ca. 10 min

Results and discussion

Test results (Oxidising liquids)

Test results (Oxidising liquids) 1

Sample tested:

reference mixture (not specified)

Remarks:

migrated information

Parameter:

mean pressure rise time

Result:

4.33 s

Remarks on result:

other: All measured values are within the tolerable range of +/- 30% (4.15 - 5.15 s) of the mean pressure rise time.

Test results (Oxidising liquids) 2

Sample tested:

test mixture (not specified)

Remarks:

migrated information

Parameter:

mean pressure rise time

Result:

5.74 s

Remarks on result:

other: All measured values are within the tolerable range of +/- 30% (5.15 - 6.51 s) of the mean pressure rise time.

Any other information on results incl. tables

Individual Results

Reference substance:

In Table 1 the pressure rise times from 690 kPa_g to 2070 kPa_g for the 1:1 mixtures, by mass, of 65 % (w/w) nitric acid and cellulose are shown. Figure 1 shows the time pressure profile.

Table 1: Pressure rise time for the 1:1 mixtures, by mass, of 65 % nitric acid and cellulose

	Test 1	Test 2	Test 3	Test 4	Test 5
Time at 690 kPag in s	9.06	8.64	13.71	9.64	9.39
Time at 2070 kPag in s	13.32	12.37	18.85	14.02	13.54
Pressure rise time in s	4.26	3.73	5.15	4.38	4.15

Test item:

In Table 2 the pressure rise times from 690 kPa_g to 2070 kPa_g for the 1:1 mixtures, by mass, of the test item and cellulose are shown. Figure 2 shows the time pressure profile.

Table 2: Pressure rise time for the 1:1 mixtures, by mass, of test item and cellulose

	Test 1	Test 2	Test 3	Test 4	Test 5
Time at 690 kPag in s	13.71	7.75	7.5	5.82	8.03
Time at 2070 kPag in s	18.85	13.33	12.99	11.79	14.54
Pressure rise time in s	5.15	5.58	5.49	5.97	6.51

Applicant's summary and conclusion

Interpretation of results:

other: no oxidising properties

Remarks:

Migrated information

Conclusions:

Due to the fact that the 1:1 mixture, by mass, of test item and cellulose has a mean pressure rise time higher than that of a 1:1 mixture, by mass, of
65 % nitric acid and cellulose the test item has no oxidising properties.

Executive summary:

The study was performed in accordance with the European Commission Regulation (EC) No. 440/2008 and EU Method A.21 in April 2010.

The test item has no oxidising properties under the test conditions in the sense of the EuropeanCommission Regulation (EC)

No. 440/2008, Method A.21.