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Merck

67309

Kovac′s reagent for indoles

suitable for microbiology

Synonym(s):

4-(Dimethylamino)benzaldehyde solution

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About This Item

Empirical Formula (Hill Notation):
C9H11NO
CAS Number:
100-10-7
Molecular Weight:
149.19
UNSPSC Code:
41171621
NACRES:
NA.85
PubChem Substance ID:
329760541
MDL number:
MFCD00003381
Beilstein/REAXYS Number:
4132845

Key Documents

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Product Name

Kovac′s reagent for indoles, suitable for microbiology

InChI

1S/C9H11NO/c1-10(2)9-5-3-8(7-11)4-6-9/h3-7H,1-2H3

SMILES string

[H]C(=O)c1ccc(cc1)N(C)C

InChI key

BGNGWHSBYQYVRX-UHFFFAOYSA-N

agency

according to ISO 16654:2001

product line

BioChemika

shelf life

limited shelf life, expiry date on the label

composition

4-(dimethlyamino)benzaldehyde, 50 g/L
hydrochloric acid, 240 g/L
isoamylic alcohol, 710 g/L

technique(s)

microbe id | specific enzyme detection: suitable

application(s)

agriculture
clinical testing
environmental
food and beverages
microbiology

storage temp.

2-8°C

suitability

Escherichia coli
coliforms

Quality Level

200

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Application

In the presence of oxygen, some bacteria, like E.coli, are able to split tryptophan into indole and alpha-aminopropionic acid. This reagent is for detecting the indole and identify the indole-positive and indole-negative microorganisms.
Kovac′s reagent may be used for spot test for determination of indole by saturating filter paper with the reagent. It may also be used for initial spot test for determination of indole followed by quantification by spectrophotometric assay and HPLC-UV/Vis-MS/MS methods.

General description

Kovac′s reagent is prepared by mixing p-dimethylaminobenzaldehyde, isoamyl alcohol and concentrated hydrochloric acid. For identification of an organism, the formation of Indole from a tryptophan substrate is a useful diagnostic tool. Indole production is a crucial test in identification of Escherichia coli. After incubation, adding the reagent will help in determination if Indole that has been produced. The reagent turns red when reacts with Indole.

signalword

Danger

Hazard Classifications

Acute Tox. 4 Inhalation - Eye Dam. 1 - Flam. Liq. 3 - Met. Corr. 1 - Skin Corr. 1B - Skin Sens. 1 - STOT SE 3

target_organs

Respiratory system

Storage Class

3 - Flammable liquids

wgk

WGK 3

flash_point_f

109.4 °F

flash_point_c

43 °C

ppe

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

Deleterious substance

pdsc

Group 4: Flammable liquids + Type 2 petroleums + Hazardous rank III + Water insoluble liquid

fsl

Substances Subject to be Indicated Names

ishl_indicated

Substances Subject to be Notified Names

ishl_notified

67309-VAR-F: + 67309-BULK-F: + 67309-100ML-F:4548173218625

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Certificates of Analysis (COA)

Lot/Batch Number
BCCN2957
BCCL5138
BCCK4337
BCCH8824
BCCG3914

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Rita R. Colwell, R. Grigorova
Methods in Microbiology, 19, 27-27 (1987)
S. Harisha
An Introduction to Practical Biotechnology, 193-193 (2005)
R W Trepeta et al.
Journal of clinical microbiology, 19(2), 172-174 (1984-02-01)
Escherichia coli is the most common gram-negative microbe isolated and identified in clinical microbiology laboratories. It can be identified within 1 h by oxidase, indole, lactose, and beta-glucuronidase tests. The oxidase and indole tests are performed as spot tests, and
Patrick R Porubsky et al.
Archives of biochemistry and biophysics, 475(1), 14-17 (2008-04-22)
Cytochrome P450 2A13 (CYP2A13) is a lung specific enzyme known to activate the potent tobacco procarcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) into two carcinogenic metabolites. CYP2A13 has been crystallized and X-ray diffraction experiments illuminated the structure of this enzyme, but with an unknown
C Creuzenet et al.
The Journal of biological chemistry, 275(45), 34873-34880 (2000-08-24)
FlaA1 is a small soluble protein of unknown function in Helicobacter pylori. It has homologues that are essential for the virulence of numerous medically relevant bacteria. FlaA1 was overexpressed as a histidine-tagged protein and purified to homogeneity by nickel chelation
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