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Merck
CN

17774

Potassium tellurite solution

1% in H2O, suitable for microbiology

Synonym(s):

Dipotassium tellurite, Potassium tellurite Solution, Tellurous acid, dipotassium salt

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About This Item

CAS Number:
7790-58-1
NACRES:
NA.85
PubChem Substance ID:
329751563
UNSPSC Code:
41171614
MDL number:
MFCD00011379

Key Documents

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Product Name

Potassium tellurite solution, 1% in H2O, suitable for microbiology

InChI

1S/2K.H2O3Te/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2

SMILES string

[K+].[K+].[O-][Te]([O-])=O

InChI key

BFPJYWDBBLZXOM-UHFFFAOYSA-L

agency

according to ISO 6888-1:2020

sterility

sterile (Filtered and Aseptic Handled)

form

liquid

shelf life

limited shelf life, expiry date on the label

concentration

1% in H2O

application(s)

environmental
food and beverages
microbiology

storage temp.

2-8°C

suitability

Corynebacterium spp.
Staphylococcus spp.

Quality Level

200

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Other Notes

10 mls per vial
sterile 1% Potassium tellurite Solution in water

Application

Potassium tellurite Solution is widely used in environmental, food and beverage, and microbiology industries for the selective isolation of Staphylococci and Corynebacteria.

General description

Potassium Tellurite Solution is a sterile, filter-sterilized 1 % solution specifically designed for the selective isolation of Staphylococcus and Corynebacteria in microbiological applications, complying with ISO 6888-1:2020 standards. Its selectivity arises from the inhibitory action of potassium tellurite against many gram-negative and some Gram-positive bacteria, allowing only the target organisms to thrive. Staphylococci and Corynebacteria can metabolize potassium tellurite, reducing it to telluride and forming distinctive black colonies, which aids in differentiation. This optimized solution provides an environment conducive to the growth of these bacteria while suppressing others.

Storage Class

10 - Combustible liquids

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCN9454
BCCN5049
BCCN3048
BCCN0404
BCCM8276

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Martina Bielaszewska et al.
Journal of clinical microbiology, 43(1), 452-454 (2005-01-07)
A total of 66 (98.5%) of 67 enterohemorrhagic Escherichia coli (EHEC) O157:H7 strains had increased potassium tellurite (Te) MICs (32 to 1,024 microg/ml), grew on Te-containing media, and possessed Te resistance (ter) genes, whereas 83 (96.5%) of 86 sorbitol-fermenting (SF)
Shelton E Murinda et al.
Foodborne pathogens and disease, 1(3), 178-184 (2005-07-05)
The objective of this study was to characterize Escherichia coli isolates from dairy cows/feedlots, calves, mastitis, pigs, dogs, parrot, iguana, human disease, and food products for prevalence of Shiga toxin-producing E. coli (STEC) virulence markers. The rationale of the study
Miguel E Castro et al.
Biochemical and biophysical research communications, 375(1), 91-94 (2008-08-05)
Potassium tellurite (K(2)TeO(3)) is extremely toxic for most forms of life and only a limited number of organisms are naturally resistant to the toxic effects of this compound. Crude extracts prepared from the environmental isolate Aeromonas caviae ST catalize the
Lillian G Acuña et al.
Archives of microbiology, 191(5), 473-476 (2009-03-31)
Potassium tellurite is highly toxic to most forms of life and specific bacterial tellurite defense mechanisms are not fully understood to date. Recent evidence suggests that tellurite would exert its toxic effects, at least in part, through the generation of
Miguel E Castro et al.
Biochemical and biophysical research communications, 380(1), 148-152 (2009-01-27)
Potassium tellurite (K(2)TeO(3)) is harmful to most organisms and specific mechanisms explaining its toxicity are not well known to date. We previously reported that the lpdA gene product of the tellurite-resistant environmental isolate Aeromonas caviae ST is involved in the
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