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481939

Sigma-Aldrich

Poly(dimethylsiloxane), hydroxy terminated

viscosity ~25 cSt 

Synonym(s):

PDMS

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100 ML
€112.00
500 ML
€397.00

€112.00

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100 ML
€112.00
500 ML
€397.00

About This Item

CAS Number:
70131-67-8
MDL number:
MFCD01325010
UNSPSC Code:
12162002
PubChem Substance ID:
24871798
NACRES:
NA.23

€112.00

Please contact Customer Service for Availability
Request a Bulk Order

mol wt

average Mn ~550

Quality Level

100

refractive index

n20/D 1.405

viscosity

~25 cSt

bp

182 °C

density

0.95 g/mL at 25 °C

SMILES string

C[Si](C)(O)O

InChI

1S/C2H8O2Si/c1-5(2,3)4/h3-4H,1-2H3

InChI key

XCLIHDJZGPCUBT-UHFFFAOYSA-N

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General description

Polydimethylsiloxane(PDMS) is a silicon-basedorganic polymer that is nontoxic, optically clear, inert, and inflammablematerial. It is widely used in heat-resistant lubricants, fire retardants,medical devices, and cosmetics. Polydimethylsiloxane is hydrophobic,cytocompatible, and viscoelastic which can be used to prepare water-repellentcoatings in the textile industry.

Application

PDMS can be used as a precursor in the synthesis of poly(dimethylsiloxane-urethane) elastomers with improved mechanical and thermal properties.

PDMS is a material of choice for ophthalmic applications due to its high mechanical strength, transparency, and oxygen permeability. It can be used as a prepolymer to prepare a glucose permeable interpenetrating network of PDMS and poly (N-isopropyl acrylamide (PNIPAAM). These networks can be used in ophthalmic applications.

PDMS can also be used to synthesize fire and heat-resistant polyurethane-PDMS hybrids. The addition of PDMS provides low flammability and thermal stabilization to polyurethane under pyrolytic conditions.

PDMS is used as an additive to prepare TEOS-based stone protective hybrid crack-free xerogels. The addition of PDMS accelerates the gelling process and helps to achieve effective stone protection.

Storage Class Code

10 - Combustible liquids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
0000297955
MKCV9462
MKCW6468
MKCT1617
MKCT8009

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L Liu et al.
Biomaterials, 26(3), 233-244 (2004-07-21)
Poly (dimethyl siloxane) (PDMS) has been widely used as a biomaterial in ophthalmic and other applications due to its good compatibility, high mechanical strength, excellent oxygen permeability and transparency. However, for use as an artificial cornea, contact lens and in

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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

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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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  3. Hello, good afternoon, excuse me, I have a question about PDMS hydroxyl terminated. What curing agent is used to have PDMS films?

    1 answer

    1. Generally, Sylgard 184 is the curing agent for PDMS, for example, 761028:https://www.sigmaaldrich.com/product/aldrich/761028
      The product contains two components. One is the curing agent. The other is vinyl-terminated PDMS. Unfortunately, the curing agent is not sold separately.

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