Registration Dossier

Diss Factsheets

Physical & Chemical properties

Additional physico-chemical information

Currently viewing:

Administrative data

Endpoint:
other: decomposition effects
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 conditions of GLP. It followed generally accepted technical standards so that it can be rated as reliable with restrictions.

Data source

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

Materials and methods

GLP compliance:
no

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)

Results and discussion

Results:
see Table 1 and Table 2

Any other information on results incl. tables

Table 1: Experimental results with miniautoclave experiments on coated sodium percarbonate (ECOX-C).

Experiment

Mass (g)

Heating rate (°C/min)

T0 (°C)

Dtime (Pmax-DeltaTmax) (sec)

SPCMA001

1

1.03

112

17

SPCMA002

1

2.57

120

15

SPCMA003

1

5.31

120

24

SPCMA004

2

2.64

108

25

Table 2: Experimental results with miniautoclave experiments on coated sodium percarbonate (ECOX-C).

Experiment

Maximum pressure (bars)

T (°C) at Pmax

DeltaTmax (°C)

T (°C) and P (bars) at DeltaTmax

Tref

Tsample

Tref

Tsample

Pressure

SPCMA001

30.9

143

146

13.9

143

157

23.8

SPCMA002

30.6

154

164

22.9

154

177

20.7

SPCMA003

35.8

161

163

15.8

163

179

22.1

SPCMA004

70.9

146

152

41.5

147

188

44.1

Applicant's summary and conclusion

Conclusions:
The test substance sodium percarbonate decomposes under thermal influence.
Executive summary:

An experiment in a miniautoclave was carried out with sodium percarbonate to investigate the decomposition effects. The onset temperature of the decomposition reaction, based on the detection of gas production, was approximately 110 °C. Compared to the onset temperatures determined with the differential scanning calorimetry and the thermo gravimetric analysis, the temperature is lower but can be considered to be more accurate.

The maximum pressure determined in the experiments was 31 bars with experiments using 1 gram of material and 71 bars with experiments using 2 grams of material.

The apparent activation energy can be calculated by the method of Kissinger and is 129.57 kJ/mole.

Categories Display