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EC number: 277-753-9 | CAS number: 74186-17-7
Grinding, sieving and drying of the test item, barium nitrate and cellulose
The cellulose was dried by treating the sample at 105 °C +/- 5 °C until the weight was constant. Due to the particle size of the cellulose grinding and sieving was not necessary.
The barium nitrate was ground, sieved < 0.12 mm and dried by treating the sample at 105 °C +/- 5 °C until the weight was constant.
The test item was dried by treating the sample at 50 °C +/- 5 °C under vacuum until the weight was
constant. The test item was not ground and sieved; the test item was < 0.12 mm.
Three test mixtures with the test item and cellulose 2:1 did not burn with a flame. Only smouldering fires were observed for >600 s. Three test mixtures with barium nitrate/cellulose 2:1 burned down completely in 60 s, 54 s and 61 s, respectively. Due to the results of the preliminary test the main test had to be performed.
Four tests were performed for the reference mixture (barium nitrate and cellulose) with 50, 55, 60 and 70 wt. % oxidizer (barium nitrate). The results are shown in Table 1:
Barium nitrate [ wt. %]
Burning time over 200 mm [s]
Burning rate [mm/s]
The highest burning rate of 1.74 mm/s was found for the mixture with 60 wt. % oxidizer.
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