1,3-Diethyl-2-thiobarbituric acid


Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:
Pricing and availability is not currently available.

Quality Level



drug control

regulated under CDSA - not available from Sigma-Aldrich Canada


109-112 °C (lit.)


1 M NaOH: soluble 50 mg/mL, clear, colorless to light yellow

SMILES string




InChI key



1,3-Diethyl-2-thiobarbituric acid (DETBA) was used as coinitiator during the photopolymerization of dental materials. It was used as reagent in electrochemical oxidation of 3,4-dihydroxybenzoic acid to yield benzofuro[2,3-d]pyrimidine derivatives. It was used in DETBA assay for determination of nicotine metabolites in human urine by HPLC.


50 g in poly bottle


Skull and crossbones

Signal Word


Hazard Statements


UN 2811 6.1 / PGIII

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

H Peach et al.
Thorax, 40(5), 351-357 (1985-05-01)
Three novel colorimetric methods of detecting urinary nicotine metabolites called the barbituric acid, diethylthiobarbituric acid (DETB), and DETB extraction methods were evaluated for use as a simple, cheap, objective test of smoking. Urine samples were collected from 103 male smokers...
E B Hoving et al.
Clinica chimica acta; international journal of clinical chemistry, 208(1-2), 63-76 (1992-06-15)
We investigated the influence of different concentrations of Fe3+, phosphoric acid, butylated hydroxytoluene and glutathione on the production of the malondialdehyde-1,3-diethyl-2-thiobarbituric acid adduct in plasma lipid extracts. Following organic solvent extraction the stable product was analyzed by spectrophotometry (537 nm)...
Eliseu A Münchow et al.
Journal of biomedical materials research. Part B, Applied biomaterials, 101(7), 1217-1221 (2013-04-09)
The ethyl-4-dimethylaminobenzoate (EDAB) is widely used as a coinitiator of the camphorquinone (CQ), but in acidic circumstances it might present some instability, reducing the polymerization efficiency of the material. Considering this, new coinitiators are being evaluated. Hence, this study evaluated...
Davood Nematollahi et al.
The Journal of organic chemistry, 67(14), 5036-5039 (2002-07-06)
Electrochemical oxidation of 3,4-dihydroxybenzoic acid (1) in the presence of 1,3-dimethylbarbituric acid (2) and 1,3-diethyl-2-thiobarbituric acid (3) as nucleophiles in aqueous solution has been studied using cyclic voltammetry and controlled-potential coulometry. The results indicate that 1 via Michael reaction under...
T Sakai et al.
Journal of chromatography. B, Biomedical sciences and applications, 726(1-2), 313-316 (1999-05-29)
The reaction conditions of 1,3-diethyl-2-thiobarbituric acid (DETBA)-malonaldehyde (MA) adduct formation were examined in order to analyze MA in fish tissue by high-performance liquid chromatography. A reaction mixture containing 4 mM butyl hydroxytoluene was heated at 100 degrees C for 150...

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service

Social Media

LinkedIn icon
Twitter icon
Facebook Icon
Instagram Icon


Research. Development. Production.

We are a leading supplier to the global Life Science industry with solutions and services for research, biotechnology development and production, and pharmaceutical drug therapy development and production.

© 2021 Merck KGaA, Darmstadt, Germany and/or its affiliates. All Rights Reserved.

Reproduction of any materials from the site is strictly forbidden without permission.