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05040

Agar

powder, suitable for microbiology

Synonym(s):

Agar-agar, Gum agar

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About This Item

Linear Formula:
(C12H18O9)n
CAS Number:
9002-18-0
eCl@ss:
42040102
UNSPSC Code:
41106212
NACRES:
NA.74
EC Number:
232-658-1
MDL number:
MFCD00081288
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sterility

non-sterile

Quality Level

100

form

powder

shelf life

limited shelf life, expiry date on the label

packaging

pkg of 1 kg, pkg of 100 g, pkg of 250 g

storage condition

(Tightly closed)

ign. residue

≤6%

loss

≤20% loss on drying

pH

5-8 (50 °C, 1.5% in H2O, 100 °C/15 min.)

transition temp

gel point ~35 °C (1.5% solution)

gel strength

>300 g/cm2 (1.5% gel)

solubility

H2O: 1.5% at 70 °C, clear to slightly hazy (100 °C/15 min.)

application(s)

agriculture, microbiology

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

General description

Agar is widely used in microbiology as a solidifying agent in microbial culture media. It is a polysaccharide derived from seaweed and is primarily composed of agarose. Agar is a mostly inert substance, which makes it an ideal material for microbial culture media because it doesn’t interfere with the growth of microorganisms. Agar can solidify media, allowing microorganisms to grow in a solid environment to promote the formation of distinct colonies and enable selective isolation of specific microorganism. It is also used to prepare selective and differential media, which can provide additional nutrients or other chemical substances to promote or inhibit the growth of specific microorganisms selectively. Agar is sterilized by autoclaving and then poured into Petri dishes to cool and solidify, forming the surface for microbial growth.

Application

Agar is commonly used as a solidifying agent in many microbial culture media for the growth and identification of bacteria, yeasts, and molds from various pharmaceutical, environmental, and food and beverage samples.

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Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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Certificates of Analysis (COA)

Lot/Batch Number
BCCP1333
BCCN4492
BCCL6478
BCCM3490
BCCM5855

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Jacinta E Browne et al.
Ultrasound in medicine & biology, 43(11), 2733-2740 (2017-08-28)
A device for the training and quantitative assessment of the competency of trainee radiologists in the technically challenging area of breast sonography was developed and evaluated. Currently, suitable commercially available devices are lacking, and there is a growing realization that
Tatiana Johnston et al.
Scientific reports, 8(1), 7062-7062 (2018-05-08)
The emergence of Staphylococcus aureus strains resistant to 'last resort' antibiotics compels the development of new antimicrobials against this important human pathogen. We found that propyl 5-hydroxy-3-methyl-1-phenyl-1H-pyrazole-4-carbodithioate (HMPC) shows bacteriostatic activity against S. aureus (MIC = 4 μg/ml) and rescues Caenorhabditis elegans from
Developmentally and stress-induced small heat shock proteins in cork oak somatic embryos.
Puigderrajols P1, Jofre A, Mir G, Pla M, Verdaguer D, Huguet G, Molinas M
Journal of Experimental Botany, 53 (373), 1445-1452 (2002)
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