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181846

Supelco

Poly(dimethylsiloxane)

analytical standard, average Mw 95,000 (Typical), average Mn 50,000 (Typical)

Synonym(s):

Dimethylpolysiloxane

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About This Item

Linear Formula:
[Si(CH3)2O]n
CAS Number:
63148-62-9
MDL number:
MFCD00084411
UNSPSC Code:
41116107
PubChem Substance ID:
24850959
NACRES:
NA.24
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grade

analytical standard

Quality Level

100

vapor pressure

5 mmHg ( 20 °C)

mol wt

average Mn 50,000 (Typical)
average Mw 95,000 (Typical)

technique(s)

gel permeation chromatography (GPC): suitable

format

neat

SMILES string

C[Si](C)=O

InChI

1S/C2H6OSi/c1-4(2)3/h1-2H3

InChI key

SEUDSDUUJXTXSV-UHFFFAOYSA-N

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General description

Poly(dimethylsiloxane) [PDMS] is a polymer. It is a stable silicone rubber. It has been used as ion selective membrane for ion-sensitive field-effect transistors, as spring material in accelerometers, elastomer on a tactile sensor and as flexible encapsulation material in decouple sensors.[1]
This substance is listed on the positive list of the EU regulation 10/2011 for plastics intended to come into contact with food.

Application

It was used in a study performed to understand its molecular weight and molecular weight distribution by off-line coupling of GPC with MALDI mass spectrometer.[2]

Storage Class Code

10 - Combustible liquids

WGK

WGK 1

Flash Point(F)

214.0 °F - closed cup

Flash Point(C)

101.1 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCP5183
MKCM6138
MKCK1684
MKCH7833
MKCG6879

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Molecular weight distribution of poly (dimethylsiloxane) by combining matrix-assisted laser desorption/ionization time-of-flight mass spectrometry with gel-permeation chromatography fractionation.
Montaudo, Giorgio, et al.
Rapid Communications in Mass Spectrometry, 9.12, 1158-1163 (1995)
Robust and biodegradable elastomers based on corn starch and polydimethylsiloxane (PDMS).
Ceseracciu L
ACS Applied Materials & Interfaces, 7(6), 3742-3753 (2015)

Questions

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  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. 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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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. 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

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