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A5633

Sigma-Aldrich

Antifoam A Concentrate

active silicone polymer 100 %

Synonym(s):

Silicone Antifoam Solution

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25 G
$64.30
100 G
$129.00

$64.30

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25 G
$64.30
100 G
$129.00

About This Item

UNSPSC Code:
12161900
NACRES:
NA.25

$64.30

In StockDetails

Request a Bulk Order

description

100% active silicone polymer

Quality Level

200

form

suspension

does not contain

emulsifier

composition

active silicone polymer, 100%

technique(s)

cell culture | mammalian: suitable
microbiological culture: suitable

Related Categories

General description

Antifoam A Concentrate is an extremely effective foam suppressor[1] for aqueous and non-aqueous systems. It is 100% active silicone polymer. No emulsifiers are present. Antifoam A Concentrate is typically effective at 1-100 ppm. Antifoam A Concentrate should be diluted with 3-10 parts of propylene glycol (aqueous) or vegetable oil (nonaqueous) with slow mixing. The product will be stable in the pH range of 5 to 9. Antifoam A Concentrate can be added directly to a fermentation medium, but it is not recommended that it be pumped to a fermenter on an as-needed basis.

Application

An extremely effective foam suppresser for use in aqueous and non-aqueous systems.
Antifoam A Concentrate has been used as a component of Luria Bertani culture medium for growth of BL21 (DE3) E. coli cells transformed with the plasmids.[2][3] It has also been used as a constituent in the preparation of aerosol generation fluid.[4]

Reconstitution

1-50 ppm is adequate for most applications.

pictograms

Environment
GHS09

signalword

Warning

hcodes

H410

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1

Storage Class

10 - Combustible liquids

wgk_germany

WGK 3

flash_point_f

>213.8 °F - closed cup

flash_point_c

> 101 °C - closed cup

ppe

Eyeshields, Gloves, type ABEK (EN14387) respirator filter

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Certificates of Analysis (COA)

Lot/Batch Number
MKCX2106
0000245207
0000245207
MKCW8303
0000245213

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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. Can antifoam A be autoclaved when added to oil or does it need to be added after oil is autoclaved

    1 answer

    1. Autoclaving may result in phase separation and may require remixing the emulsion. A different emulsifier is present in each of the Antifoam emulsions.

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