Celite Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
FEINES WEISSES PULVER.
PHYSIKALISCHE GEFAHREN
Beim Erhitzen der Substanz auf hohe Temperaturen wird kristallines Siliciumdioxid gebildet (s. ICSC 0809 Cristobalit).
ARBEITSPLATZGRENZWERTE
TLV (als amorphes Siliciumdioxid): 10 mg/m?(als TWA) (Einatembare Fraktion); 3 mg/m?(als TWA) (Alveoleng?ngige Fraktion); Beabsichtigte ?nderung: Silica amorph - ungenügende Daten (ACGIH 2005).
MAK: 4 mg/m?(Einatembare Fraktion); Schwangerschaft: Gruppe C; (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den K?rper durch Inhalation.
INHALATIONSGEFAHREN
Verdampfung bei 20°C vernachl?ssigbar; eine gesundheitssch?dliche Partikelkonzentration in der Luft kann jedoch beim Dispergieren schnell erreicht werden.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
M?glich sind Auswirkungen auf die Lunge mit nachfolgender leichter Fibrose (s. Anm.).
LECKAGE
Verschüttetes Material in Beh?ltern sammeln; falls erforderlich durch Anfeuchten Staubentwicklung verhindern. Reste mit viel Wasser wegspülen. Pers?nliche Schutzausrüstung: Atemschutzger?t, P1-Filter für inerte Partikel.
R-S?tze Betriebsanweisung:
R48/20:Gesundheitssch?dlich: Gefahr ernster Gesundheitssch?den bei l?ngerer Exposition durch Einatmen.
R36/37:Reizt die Augen und die Atmungsorgane.
R49:Kann Krebs erzeugen beim Einatmen.
S-S?tze Betriebsanweisung:
S22:Staub nicht einatmen.
S39:Schutzbrille/Gesichtsschutz tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
Chemische Eigenschaften
tan powder
Verwenden
Filter Aid, Celite AW Standard Supercel? is used for general filtrations. It is also used as a functional filler in paints, plastics, paper, rubber, adhesives, catalysts, agricultural chemicals, pharmaceuticals and other chemicals, and a mild abrasive in polishes and cleaners. It is also used in clarifying liquids and oils, as an efficient thermal insulator; in manufacture of heat insulators, fire brick, and fire- and acid-proof packing materials; as an absorbent; in absorbent dynamite; as a solid carrier in chromatography; pozzolanic admixture in concrete mixes.
Definition
Diatomite: A whitish powdered
mineral consisting mainly of silica (silicon(
IV) oxide) derived from the shells of
diatoms. It is used to make fireproof cements
and as an absorbent in the manufacture
of DYNAMITE.
Allgemeine Beschreibung
Celpure
? P65 (Diatomaceous earth, DE) is natural amorphous silica formed from the fossilized skeletons of diatoms. It is extracted, crushed, dried and calcined with or without flux material. DE is widely used as filler in construction materials, paints and as an anti-caking agent for agricultural chemicals. It has high water and oil absorption ability. The potential toxicity of different samples of DE has been assessed. DE is also employed as an adsorbent for column chromatography.
Landwirtschaftliche Anwendung
Diatomaceous earth: Diatomaceous earth kills and repels insects, including
bed bugs, fleas, cockroaches, and carpet beetles, by
dehydrating them, rather than chemically poisoning them,
and has been used since early times. It is also used as a filtering
agent and as a filler in construction materials, pesticides,
paints, and varnishes. The calcined version (which
has been heat treated) is the most dangerous and contains
crystallized silica, and should be handled as silica.
Handelsname
CELITE®; CROP GUARD®; DIACTIV®;
DIAFIL®; DI-ATOMATE®; DIE-SECTICIDE®;
KENITE®; PRIMISIL®
m?gliche Exposition
Diatomaceous earth is used as
a filtering agent and as a filler in construction materials,
pesticides, paints, and varnishes. The calcined version
(which has been heat treated) is the most dangerous and
contains crystallized silica, and should be handled as silica.
See also other entries on silica
Versand/Shipping
This material is not singled out by DOT
in its
Performance-Oriented Packaging Standards.
Inkompatibilit?ten
Silica, amorphous is a noncombustible solid. Generally unreactive chemically. Incompatible with fluorine, oxygen difluoride, chlorine trifluoride. Soluble in molten alkalis and reacts with most metallic oxides at high temperature.
Waste disposal
Sanitary landfill.
Celite Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
