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469319

Sigma-Aldrich

Poly(dimethylsiloxane)

viscosity 1.0 cSt (25 °C)

Synonym(s):

Octamethyltrisiloxane

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About This Item

Linear Formula:
[(CH3)3SiO]2Si(CH3)2
CAS Number:
107-51-7
Molecular Weight:
236.53
Beilstein/REAXYS Number:
1753063
EC Number:
203-497-4
MDL number:
MFCD00008264
UNSPSC Code:
12162002
PubChem Substance ID:
24870584
NACRES:
NA.23

vapor density

>1 (vs air)

Quality Level

100

refractive index

n20/D 1.384 (lit.)

viscosity

1.0 cSt(25 °C)

bp

153 °C (lit.)

mp

−82 °C (lit.)

density

0.82 g/mL at 25 °C (lit.)

SMILES string

C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C

InChI

1S/C8H24O2Si3/c1-11(2,3)9-13(7,8)10-12(4,5)6/h1-8H3

InChI key

CXQXSVUQTKDNFP-UHFFFAOYSA-N

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General description

Poly(dimethylsiloxane) (PDMS), also known as dimethicone, is an organosilicon compound that is widely used as a siloxane based elastomer. It is a hydrophobic material with attractive physical and chemical properties such as elasticity, optical transparency, tunable surface chemistry, and low electrical conductivity.[1][2][3]

Application

PDMS can be used in microfluidic devices,[4] nanolithography,[5] and other membrane based applications.[6][7]

pictograms

Flame
GHS02

signalword

Warning

hcodes

H226

Hazard Classifications

Flam. Liq. 3

Storage Class

3 - Flammable liquids

wgk_germany

WGK 3

flash_point_f

84.2 °F - (External MSDS)

flash_point_c

29 °C - (External MSDS)

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

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Certificates of Analysis (COA)

Lot/Batch Number
MKCN4821
MKCF5823
MKBW1823V
MKBL6189V
MKBF7256V

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Chong In Shin et al.
Pharmaceutics, 11(7) (2019-08-03)
The stratum corneum is the outermost skin layer that obstructs the delivery of active ingredients found in cosmeceutical products. Chemical peels and microbeads have been used to overcome this layer, but these methods can cause side effects and are not
Shimao Fang et al.
Journal of the science of food and agriculture, 99(9), 4344-4352 (2019-03-05)
Keemun black tea (KBT) is one of the most popular tea beverages in China as a result of its unique flavor and potential health benefits. The geographical origin of KBT influences its quality and price. The present study aimed to
Jianye Ji et al.
Polymers, 11(7) (2019-07-07)
Methoxyl-capped MQ silicone resin (MMQ) was first synthesized by the hydrosilylation of vinyl-containing MQ silicone resin and trimethoxysilane and then used in condensed room-temperature vulcanized (RTV) silicone rubber as a self-reinforced cross-linker. Results show that modified silicone rubber exhibits good
Yihe Wang et al.
Advanced science (Weinheim, Baden-Wurttemberg, Germany), 6(15), 1900712-1900712 (2019-08-14)
Intracytoplasmic sperm injection is a popular form of in vitro fertilization, where single sperm are selected by a clinician and injected into an egg. Whereas clinicians employ general morphology-based guidelines to select the healthiest-looking sperm, it remains unclear to what
Electrokinetic control of fluid flow in native poly (dimethylsiloxane) capillary electrophoresis devices
Ocvirk G, et al.
Electrophoresis, 21(1), 107-115 (2000)
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Questions

1–3 of 3 Questions  

  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

      Helpful?

  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

      Helpful?

  3. I would like to ask if this PDMS consists of curing agent. Please inform the curing condition of the PDMS.

    1 answer

    1. This product doesn't include curing agent. The curing condition depends on which curing agent is applied. One common curing agent is supplied by Dow Chemical: Sylgard 184. It could cure and cross-link the polymer when mixed in a certain ratio under room temperature, or gently heating for faster cure.

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