Zitieren Sie bitte immer diese URN: urn:nbn:de:kobv:b43-523989

False-Positive Results of UN Test O.2 Liquid Oxidizer Test of Polychlorosilanes

  • According to UN Test O.2, surprisingly, the polychlorosilanes hexachlorodisilane (HCDS), octachlorotrisilane (OCTS) and decachlorotetrasilane (DCTS) formally fulfill the criteria of the “test for oxidizing liquids”. This result is in contrast to the properties of polychlorosilanes that are described in the literature and those we have experienced in our own production. By investigating the reaction products from the UN O.2 test reactor, using IR, Raman and XPS spectroscopy, it was shown that the results are not due to oxidizing properties of HCDS, OCTS or DCTS, but are caused by the specified test substance cellulose. To our knowledge, this is the very first substance class in which the reference substance oxidizes the test sample, instead of vice versa. This represents an important limitation of the internationally used UN Test O.2 for this substance class. The cause for this false-positive result is the known high degree of affinity of oxygen to silicon. It is shown that theAccording to UN Test O.2, surprisingly, the polychlorosilanes hexachlorodisilane (HCDS), octachlorotrisilane (OCTS) and decachlorotetrasilane (DCTS) formally fulfill the criteria of the “test for oxidizing liquids”. This result is in contrast to the properties of polychlorosilanes that are described in the literature and those we have experienced in our own production. By investigating the reaction products from the UN O.2 test reactor, using IR, Raman and XPS spectroscopy, it was shown that the results are not due to oxidizing properties of HCDS, OCTS or DCTS, but are caused by the specified test substance cellulose. To our knowledge, this is the very first substance class in which the reference substance oxidizes the test sample, instead of vice versa. This represents an important limitation of the internationally used UN Test O.2 for this substance class. The cause for this false-positive result is the known high degree of affinity of oxygen to silicon. It is shown that the correctly executed UN Test O.2 produces false-positive results and that the polychlorosilanes do not have an oxidizing effect and, therefore, do not have to be classified as “oxidizing substances”.zeige mehrzeige weniger

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Metadaten
Autoren/innen:C. Krösche, Marcus Malow, K. Budde
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Journal of Loss Prevention in the Process Industries
Jahr der Erstveröffentlichung:2020
Organisationseinheit der BAM:2 Chemische Sicherheitstechnik
2 Chemische Sicherheitstechnik / 2.2 Reaktionsfähige Stoffe und Stoffsysteme
Veröffentlichende Institution:Bundesanstalt für Materialforschung und -prüfung (BAM)
Herausgeber (Institution):Loss Prevention in the Process Industries
Verlag:Elsevier Ltd.
Jahrgang/Band:70
Erste Seite:104434
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Freie Schlagwörter:Decachlorotetrasilane; False-positive results; Hexachlorodisilane; Octachlortrisilane; Polychlorosilanes; UN Test O.2
Themenfelder/Aktivitätsfelder der BAM:Material
Material / Materialien und Stoffe
DOI:https://doi.org/10.1016/j.jlp.2021.104434
URN:urn:nbn:de:kobv:b43-523989
Verfügbarkeit des Dokuments:Datei für die Öffentlichkeit verfügbar ("Open Access")
Lizenz (Deutsch):License LogoCreative Commons - CC BY - Namensnennung 4.0 International
Datum der Freischaltung:08.04.2021
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:15.04.2021
Schriftenreihen ohne Nummerierung:Wissenschaftliche Artikel der BAM