Registration Dossier
Registration Dossier
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EC number: 220-028-9 | CAS number: 2610-11-9
Oxidising properties
Administrative data
Link to relevant study record(s)
Description of key information
non oxidising properties
Key value for chemical safety assessment
- Oxidising properties:
- no
Additional information
According to the REACH Regulation (EC n. 1907/2006), Annex VII, Column 2, the study does not need to be conducted if the substance is incapable of reacting exothermically with combustible materials, for example on the basis of the chemical structure (e.g. organic substances not containing oxygen or halogen atoms and these elements are not chemically bonded to nitrogen or oxygen, or inorganic substances not containing oxygen or halogen atoms). Direct Red 023 Reaction mass is incapable of reacting exothermically with combustible materials on the basis of its chemical structure: it contains oxygen/halogens atoms that are not chemically bonded to nitrogen or oxygen.
Justification for classification or non-classification
For organic substances is commonly used and accepted a screening evaluation that take into account the degree to which a substance can be oxidized, related to the chemical structure: Oxygen Balance (OB) calculation may be used as a further criterion, in combination with chemical structure evaluation, in order to predict whether a substance has the potential to be an oxidant. The oxygen balance is calculated from the empirical formula of a compound in percentage of oxygen required for complete conversion of carbon to carbon dioxide and hydrogen to water.
The oxygen balance is calculated using the formula:
Oxygen balance = - 1600 [2x + (y/2)-z]/molecular weight;
where:
X = number of atoms of carbon
Y = number of atoms of hydrogen
Z = number of atoms of oxygen
A negative oxygen balance is an indication that substance contains less oxygen than is needed; therefore, it is notexpected that substance may, generally by yielding oxygen, cause, or contribute to the combustion of other materials.
Oxygen balance was calculated for the former EC and resulted equal to - 140.9
Based on the information and review of Direct Red 81, it is deemed not to be potentially oxidising, based on the chemical structure, the oxygen balance values and the known experience in the handling and use of substances.
Therefore, is not classified as oxidising substance, according to the CLP Regulation (EC 1272/2008).
A negative oxygen balance is related to non oxidising properties. Specific rules for adaptation as decribed in Column 2 Annex VII can be applied and the oxidising properties study does not need to be conducted.
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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