Merck
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M2128

Sigma-Aldrich

Thiazolyl Blue Tetrazolium Bromide

98%

Synonym(s):
MTT, 3-(4,5-Dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide, Methylthiazolyldiphenyl-tetrazolium bromide
Empirical Formula (Hill Notation):
C18H16BrN5S
CAS Number:
Molecular Weight:
414.32
Beilstein:
4081397
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.47

Quality Level

assay

98%

form

powder

mp

195 °C (dec.) (lit.)

solubility

2-methoxyethanol: soluble 20 mg/mL
ethanol: soluble 20 mg/mL
H2O: 5 mg/mL

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

2-8°C

SMILES string

[Br-].Cc1nc(sc1C)-[n+]2nc(nn2-c3ccccc3)-c4ccccc4

InChI

1S/C18H16N5S.BrH/c1-13-14(2)24-18(19-13)23-21-17(15-9-5-3-6-10-15)20-22(23)16-11-7-4-8-12-16;/h3-12H,1-2H3;1H/q+1;/p-1

InChI key

AZKSAVLVSZKNRD-UHFFFAOYSA-M

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Application

Thiazolyl Blue Tetrazolium Blue (MTT) may be used in measurement of cell proliferation. MTT produces a yellowish solution that is converted to dark blue, water-insoluble MTT formazan by mitochondrial dehydrogenases of living cells. The blue crystals are solubilized with acidified isopropanol and the intensity is measured colorimetrically at 570 nm. MTT has been used as a histochemical/cytochemical reagent and for the detection of NAD. ADP-linked enzyme systems in tissue cannot be detected with MTT, due to binding of the cation by the cyanide trap used. MTT is rapidly reduced to the formazan, which chelates with nickel, copper, and cobalt; the cobalt chelate has been used in oxidative systems.
Thiazolyl Blue Tetrazolium Bromide has been used for the following assays:
  • Proliferation assay.
  • TNF (tumor necrosis factor) bioassay.

Packaging

1, 5, 10 g in glass bottle
100, 250 mg in glass insert
500 mg in glass bottle

Pictograms

Exclamation markHealth hazard

Signal Word

Warning

Hazard Statements

Hazard Classifications

Eye Irrit. 2 - Muta. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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