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.pdf
431257
Polyisoprene, cis
average Mw ~38,000 by GPC, made from natural rubber
Sinonimo/i:
Poly(1-methyl-1-butene-1,4-diyl)
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About This Item
Prodotti consigliati
Descrizione
unsaturation 98 mole %
Stato
viscous liquid
PM
average Mw ~38,000 by GPC
Viscosità
350 poise(37 °C, Brookfield)(lit.)
Densità
0.92 g/mL at 25 °C
Stringa SMILE
CC(=C)C=C
InChI
1S/C5H8/c1-4-5(2)3/h4H,1-2H2,3H3
RRHGJUQNOFWUDK-UHFFFAOYSA-N
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Categorie correlate
Applicazioni
Codice della classe di stoccaggio
10 - Combustible liquids
Classe di pericolosità dell'acqua (WGK)
WGK 3
Punto d’infiammabilità (°F)
Not applicable
Punto d’infiammabilità (°C)
Not applicable
Dispositivi di protezione individuale
Eyeshields, Gloves
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Certificati d'analisi (COA)
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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
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I am wondering if the polyisoprene is made from resins of balata or gutta-percha, because it is mentioned that it is made from natural rubber, or is its whole production synthetic?
1 answer-
This product is indicated as being made from natural rubber. Natural rubber is generally sourced from the latex of different trees or plants. Unfortunately, there are no specific details on the type of tree or plant that the natural rubber is obtained from. Please be aware that this product is intended for R&D use, and specific details on manufacturing are not available for this level of product.
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