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A5306

Sigma-Aldrich

Bacteriological agar

for molecular biology

Synonym(s):

Agar, Agar-agar, Gum agar

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250 G
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About This Item

Linear Formula:
(C12H18O9)n
CAS Number:
9002-18-0
EC Number:
232-658-1
MDL number:
MFCD00081288
UNSPSC Code:
50405901
NACRES:
NA.31

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grade

Molecular Biology

Quality Level

200

form

powder

SMILES string

O1[C@@H]([C@@H]([C@@H]([C@H](C1OC2[C@H]3OCC2OC([C@H]3O)C)O)OC)O)CO

InChI

1S/C14H24O9/c1-5-8(16)13-11(7(21-5)4-20-13)23-14-10(18)12(19-2)9(17)6(3-15)22-14/h5-18H,3-4H2,1-2H3/t5?,6-,7?,8-,9+,10-,11?,12+,13+,14?/m1/s1

InChI key

GYYDPBCUIJTIBM-DYOGSRDZSA-N

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General description

Bacteriological agar is a colloidal substance and a cell wall component, obtained from Rhodoyceae (marine algae)[1] and Gelidium sp.[2] Agarose combined with agaropectin forms this polysaccharide. It is also called as agar-agar and is a polymer of galactoside. This agar is soluble in boiling water but not in cold water.[2]

Application

Bacteriological agar has been used:
  • as a component of ATCC agar for Escherichia coli culture[3]
  • as one of the experimental diet feed for Atlantic salmon fry, to study the protein and lysine requirements for maintenance and for tissue accretion[4]
  • as component of yeast extract peptone dextrose medium, Luria broth medium and synthetic complete drop out medium for Escherichia coli culture[5]

Biochem/physiol Actions

Bacteriological agar is commonly used as a culture medium for microorganism. It is useful for fermentation process. Agar-agar serves as a preservative in food processing. It also possesses various other applications such as an emulsifier, carrier, lubricant, stabilizer, laxative disintegrant in pharmaceutical and cosmetic industries. Agar-agar is also used in photographic emulsion.[2]

Quality

A purified agar in which the original naturally occurring pigments, salts and miscellaneous matter have been reduced to a minimum.

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCV7124
MKCW2031
MKCW4550
MKCT0740
MKCV1213

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Measuring the activity of protein variants on a large scale using deep mutational scanning
Fowler DM, et al.
Nature Protocols, 9(9), 2267-2267 (2014)
Decontamination of materials contaminated with Francisella philomiragia or MS 2 bacteriophage using PES-Solid, a solid source of peracetic acid
Buhr TL, et al.
Journal of Applied Microbiology, 117(2), 397-404 (2014)
Protein and lysine requirements for maintenance and for tissue accretion in Atlantic salmon (Salmo salar) fry
Abboudi T, et al.
Aquaculture (Amsterdam, Netherlands), 261(1), 369-383 (2006)
Natural Food Antimicrobial Systems, 417-417 (2000)
Handbook of Fillers, Extenders, and Diluents, 223-223 (2007)
View All Related Papers

Protocols

Yeast Drop Out

Magnetic-plasmonic nanoparticles: Synthesis and application of Ag/FeCo/Ag nanobeads for cellular organelle imaging and isolation.

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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