Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
Wichtige Dokumente
363170
Poly(vinylalkohol)
Mw 13,000-23,000, 87-89% hydrolyzed
Synonym(e):
PVA
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About This Item
Empfohlene Produkte
Qualitätsniveau
Form
crystalline powder
crystals or granules
powder
Mol-Gew.
Mw 13,000-23,000
Kugelfallversuch
3.5-4.5 cP, 4 % in H2O(20 °C)(lit.)
InChI
1S/C2H4O/c1-2-3/h2-3H,1H2
InChIKey
IMROMDMJAWUWLK-UHFFFAOYSA-N
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Allgemeine Beschreibung
Anwendung
Er kann zur Herstellung einer Hydrogelmatrize zum Erzeugen von homogenen Mikropartikeln für die verzögerte Arzneimittelfreisetzung verwendet werden. PVA wird als Stabilisator für die Mikropartikelherstellung eingesetzt, da er eine hohe Zugfestigkeit und Flexibilität besitzt.
Leistungsmerkmale und Vorteile
- Gute mechanische und chemische Stabilität
- Nichttoxisch
- Abstimmbare Hydrophilie
- Resistenz gegenüber Lösungsmitteln Kann Filme bilden
Lagerklassenschlüssel
11 - Combustible Solids
WGK
WGK 1
Flammpunkt (°F)
No data available
Flammpunkt (°C)
No data available
Persönliche Schutzausrüstung
Eyeshields, Gloves, type N95 (US)
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How is shipping temperature determined? And how is it related to the product storage temperature?
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How can I determine the shelf life / expiration / retest date of this product?
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If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdfHelpful?
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Do you have any data indicating an expected range of particle size for PVA, Poly(vinyl alcohol), products 363170 and 363138 (CAS 9002-89-5)?
1 answer-
The particle size is an internal specification, and there are no external specifications beyond the internal “S” grade. Internally, the focus is on ensuring there are no excessive quantities of fines (<100 Mesh) or excessive large particles (>14 Mesh). These internal requirements do not vary between the two products listed.
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