Registration Dossier
Registration Dossier
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Reaction mass of sodium(E)-6,7'-carbonylbis(azanediyl)bis(4-hydroxy-3-((E)-phenyldiazenyl) naphthalene-2-sulfonate) and disodium 3-[(4-acetamidophenyl)azo]-4-hydroxy-7-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]naphthalene-2-sulphonate and disodium 7,7'-(carbonyldiimino)bis[4-hydroxy-3-(phenylazo)naphthalene-2-sulphonate]
EC number: 939-268-7 | CAS number: -
Stability: thermal, sunlight, metals
Administrative data
Link to relevant study record(s)
Description of key information
Decomposition from 200 °C
Additional information
Thermo gravimetric analysis (TGA) - OECD 113
Justification for classification or non-classification
The purpose of the methods is to obtain a preliminary judgement of the stability of a substance with respect to heat and air in order to provide guidance in the performance of other tests. The thermogravimetric analysis (TGA) determination gives information about decomposition reactions involving the elimination of volatile decomposition products.
The thermal stability of the substance is a relevant parameter specially for the explosive potential and can give indication about if and how proceed with further specific investigations.
During the Direct Red 023 Reaction mass thermal investigation four losses of weight were observed: the first one was attributed to the water evaporation, the others losses of weight were attributed to the thermal decomposition of the test substance. At the end of analysis (700 °C) about the 19 percent of the substance weight was lost. The Differential Scanning Calorimetry analysis performed in order to determine the melting/boiling point shows that the energy involved in the decomposition does not give reason of concern related to an explosive potential.
These consideration within those outlined in the explosiveness enpoint, lead to the conclusion that a classification for explosiveness of Direct Red 023 Reaction mass is not proposed, according to the CLP Regulation (EC 1272/2008).
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