Merck
CN
All Photos(1)

Documents

A6426

Sigma-Aldrich

Antifoam 204

mixture of organic polyether dispersions

Sign Into View Organizational & Contract Pricing
All Photos(1)
Synonym(s):
organic antifoam
MDL number:
MFCD00130523
NACRES:
NA.25

form

liquid

technique(s)

microbiological culture: suitable

viscosity

400 cP(lit.)

density

1.01 g/cm3 at 25 °C (lit.)

Looking for similar products? Visit Product Comparison Guide

Related Categories

General description

Antifoam function as an effective foam suppressor. Antifoam 204 contains 100% active components and is a mixture of organic non-silicone polypropylene-based polyether dispersions. It does not contain mineral oil. Antifoam 204 can itself be considered a surfactant, but it contains no other surfactants. This product is synthetic and not derived from animal or plant sources. Antifoam 204 can be sterilized repeatedly. The flow properties of Antifoam 204 are such that it can be pumped to a fermenter on an as-needed basis. For use in microbiological media, Sigma recommends a starting concentration of between 0.005% and 0.01%.

Application

Antifoam 204 has been used:

  • to suppress bubbling in thylakoid solutions during intramembrane isoprene quantification
  • as a component of fed-batch continuous culture fermentation medium
  • to suppress severe foaming in fermenter

Other Notes

Contains 100% active components and is a mixture of non-silicone organic defoamers in a polyol dispersion. Can be sterilized repeatedly.

Storage Class Code

10 - Combustible liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Physiology of Aspergillus niger in oxygen-limited continuous cultures: Influence of aeration, carbon source concentration and dilution rate
Diano A, et al.
Biotechnology and Bioengineering, 103(5), 956-965 (2009)
Ultrasound-assisted fermentation enhances bioethanol productivity
Sulaiman AZ, et al.
Biochemical Engineering Journal, 54(3), 141-150 (2011)
A novel noncovalent complex of chorismate mutase and DAHP synthase from Mycobacterium tuberculosis: protein purification, crystallization and X-ray diffraction analysis
M Okvist, et al.
Acta Crystallographica Section F, Structural Biology and Crystallization Communications, 65(10), 1048-1052 (2009)
Concentration of isoprene in artificial and thylakoid membranes
Harvey CM, et al.
Journal of Bioenergetics and Biomembranes, 47(5), 419-429 (2015)
Erin E Johnson et al.
Bioresource technology, 209, 1-7 (2016-03-08)
Waste crude glycerol from biodiesel production can be used to produce biobutanol using Clostridium pasteurianum with the main products being n-butanol, 1,3-propanediol (PDO) and ethanol. There has been much discrepancy and mystery around the cause and effect of process parameters
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service