Registration Dossier
Registration Dossier
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EC number: 407-430-1 | CAS number: 3741-80-8 CP22595; SANTOCURE TBS1
Oxidising properties
Administrative data
Link to relevant study record(s)
Description of key information
The test results (higher burning rates with the test compound/cellulose mixture in comparison with the Ba(NO3)2/cellulose mixture and cellulose itself) indicate that the substance has oxidising properties. However the observations on the flame propagation, the flame itself and the resulting residues indicate that the higher burning rate is caused by flammable decomposition products and not by the oxidising properties of the test material.
Key value for chemical safety assessment
- Oxidising properties:
- no
Additional information
TBSI was tested for its oxidising properties according to EC guideline A17. It showed that TBSI burns cellulose significantly faster than pure cellulose and also faster than with the reference compound Ba(NO3)2. This would lead to the conclusion that the compound is oxidising.
However the way in which the cellulose/TBSI mixture burns
- much smoke
- flame propagation from the surface
- large flame front
- black sticky residue
Is very different from the way in which the cellulose/Ba(NO3)2 (a known oxidiser) burns
- no smoke
- flame propagation over the whole sample
- small flame front
- no residue
Therefore it is concluded that the faster flame propagation can not be caused by the oxidising properties of the test material. So, the test material is not oxidising. Also based on the chemical structure oxidising properties would not be expected for TBSI.
The most likely explanation of the faster flame propagation is that upon heating the test compound melts (mp 135 -140 °C) and decomposes. Decomposition leads to tert-butylamine, which is volatile and flammable.
Justification for classification or non-classification
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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