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Description of key information

The burning time of the mixture of tantalum pentachloride with cellulose (ratios of 4:1 and 1:1) is higher than the burning time of the reference mixture of potassium bromate and cellulose (ratio 3:7). No scorch or an extinguished flame has been observed in one of the 5 test mixtures. Therefore, tantalum pentachloride does not have to be classified as oxidizing solid.

Key value for chemical safety assessment

Oxidising properties:
no

Additional information

The testing of the oxidizing properties of tantalum pentachloride has been conducted according to UN Regulation Test O.1 (2009) by evaluating the burning times of mixtures of tantalum pentachloride with cellulose in the rations of 4:1 and 1:1. The results were then compared to reference mixtures consisting of potassium bromate and cellulose (ratios 2:3 and 3:7). The recording of burning times were taken from the time power was applied to the heating wire until the end of occurring main reactions such like inflammation, incandescence or glowing combustion. Five replications were performed for each test/reference mixture. The classification of tantalum pentachloride follows the UN Transportation Regulation and GHS or EC 1272/2008 (CLP Regulation) Annex 1: 2.14. The burning time of the mixture of tantalum pentachloride with cellulose (ratios of 4:1 and 1:1) is higher than the burning time of the reference mixture of potassium bromate and cellulose (ratio 3:7). No scorch or an extinguished flame has been observed in one of the 5 test mixtures. Therefore, tantalum pentachloride does not have to be classified as oxidizing solid according to UN Transport Regulations (Division 5.1) and GHS and EC 1271/2008 (CLP Regulation), Annex 1: 2.14.

Justification for classification or non-classification

The burning time of the mixture of tantalum pentachloride with cellulose (ratios of 4:1 and 1:1) is higher than the burning time of the reference mixture of potassium bromate and cellulose (ratio 3:7). No scorch or an extinguished flame has been observed in one of the 5 test mixtures. Therefore, tantalum pentachloride does not have to be classified as oxidizing solid according to UN Transport Regulations (Division 5.1) and GHS and EC 1271/2008 (CLP Regulation), Annex 1: 2.14.