2-Thiobarbituric acid
- CAS No.
- 504-17-6
- Chemical Name:
- 2-Thiobarbituric acid
- Synonyms
- TBA;THIOBARBITURIC ACID;2-Thioxodihydropyrimidine-4,6(1H,5H)-dione;2-sulfanylpyriMidine-4,6-diol;4,6-DIHYDROXY-2-MERCAPTOPYRIMIDINE;bathyran;austranal;usafek-660;2-Mercapto-4;Thiobarbituric
- CBNumber:
- CB5251676
- Molecular Formula:
- C4H4N2O2S
- Molecular Weight:
- 144.15
- MDL Number:
- MFCD00006674
- MOL File:
- 504-17-6.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Product description | Number | Pack Size | Price |
| 2-Thiobarbituric acid ≥98% | T5500 | 25g | $58.2 |
| 2-Thiobarbituric acid ≥98% | T5500 | 100g | $165 |
| 2-Thiobarbituric Acid | 27367 | 50g | $68 |
| 2-Thiobarbituric Acid | 27367 | 250g | $283 |
| 2-Thiobarbituric acid ≥98% | T5500 | 250g | $382 |
| More product size | |||
| Melting point | 245 °C (dec.)(lit.) |
|---|---|
| bulk density | 210kg/m3 |
| Density | 1.451 (estimate) |
| refractive index | 1.7690 (estimate) |
| storage temp. | Inert atmosphere,2-8°C |
| solubility | 50g/l slightly soluble |
| pka | 3.96±0.20(Predicted) |
| form | Liquid |
| color | Clear colorless |
| PH | 1.7-1.9 (10g/l, H2O, 20℃) |
| Water Solubility | <6 g/L (20 ºC) |
| BRN | 120663 |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| InChI | 1S/C4H4N2O2S/c7-2-1-3(8)6-4(9)5-2/h1H2,(H2,5,6,7,8,9) |
| InChIKey | RVBUGGBMJDPOST-UHFFFAOYSA-N |
| SMILES | O=C1CC(=O)NC(=S)N1 |
| CAS DataBase Reference | 504-17-6(CAS DataBase Reference) |
| FDA UNII | M1YZW5SS7C |
| NIST Chemistry Reference | 4,6(1H,5h)-pyrimidinedione, dihydro-2-thioxo-(504-17-6) |
| EPA Substance Registry System | 4,6(1H,5H)-Pyrimidinedione, dihydro-2-thioxo- (504-17-6) |
| UNSPSC Code | 12352115 |
| NACRES | NB.21 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H315-H319-H335 | |||||||||
| Precautionary statements | P261-P280a-P304+P340-P305+P351+P338-P405-P501a | |||||||||
| PPE | Eyeshields, Gloves, type N95 (US) | |||||||||
| Hazard Codes | Xi | |||||||||
| Risk Statements | 36/37/38 | |||||||||
| Safety Statements | 22-24/25-37/39-26 | |||||||||
| RIDADR | UN 3335 | |||||||||
| WGK Germany | 2 | |||||||||
| RTECS | CQ7700000 | |||||||||
| F | 13-23 | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 29335995 | |||||||||
| Storage Class | 11 - Combustible Solids | |||||||||
| NFPA 704 |
|
2-Thiobarbituric acid price More Price(29)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | T5500 | 2-Thiobarbituric acid ≥98% | 504-17-6 | 25g | $58.2 | 2026-03-19 | Buy |
| Sigma-Aldrich | T5500 | 2-Thiobarbituric acid ≥98% | 504-17-6 | 100g | $165 | 2026-03-19 | Buy |
| Cayman Chemical | 27367 | 2-Thiobarbituric Acid | 504-17-6 | 50g | $68 | 2024-03-01 | Buy |
| Cayman Chemical | 27367 | 2-Thiobarbituric Acid | 504-17-6 | 250g | $283 | 2024-03-01 | Buy |
| Sigma-Aldrich | T5500 | 2-Thiobarbituric acid ≥98% | 504-17-6 | 250g | $382 | 2026-03-19 | Buy |
2-Thiobarbituric acid Chemical Properties,Uses,Production
Chemical Properties
Off-White to Yellow Powder. soluble in hot water, alcohol, ether, alkali and sodium carbonate solution, slightly soluble in water.
Uses
4,6-Dihydroxy-2-mercaptopyrimidine can be used to quantitate lipopolysaccharides, carrageenan, and sialic acids, and to detect lipid hydroperoxides and lipid oxidation.
Uses
2-Thiobarbituric acid has been used to measure malondialdehyde (MDA) in lipid peroxidation assay.
Preparation
2-thiobarbituric acid was synthesized by the reaction of diethyl malonate with thiourea. Dissolve thiourea in methanol, add sodium methoxide and diethyl malonate, heat under reflux for 4-5h, then distill under reduced pressure to recover methanol to the end, and add hydrochloric acid to acidify to pH 1-2 after cooling. After standing overnight, thiobarbituric acid crystals were precipitated, filtered, and recrystallized with water to obtain the pure product.
Definition
ChEBI: 2-thiobarbituric acid is a barbiturate, the structure of which is that of barbituric acid in which the oxygen at C-2 is replaced by sulfur. It has a role as a reagent and an allergen.
General Description
2-Thiobarbituric acid is a molecule made up of heteroatoms: nitrogen, sulphur and oxygen.
Biochem/physiol Actions
2-Thiobarbituric acid (TBA) is useful to quantitate lipopolysaccharides, carrageenan, and sialic acids. It is also used to detect lipid hydroperoxides and lipid oxidation. It has applications in the field of medicine and biochemistry. TBA may possess the ability to prevent metal corrosion.
Synthesis
17356-08-0
105-53-3
504-17-6
The general procedure for the synthesis of 4,6-dihydroxy-2-mercaptopyrimidine from the compound (CAS: 17356-08-0) and diethyl malonate was as follows: 6 g (0.25 mol) of sodium metal was dissolved in 200 mL of anhydrous ethanol. Subsequently, 15 g (0.25 mol) of thiourea and 40 mL of diethyl malonate were sequentially added to this solution. The reaction mixture was placed in an oil bath and refluxed for 6 hours. Upon completion of the reaction, ethanol was recovered by vacuum distillation. The clarified solution obtained was washed with water and then cooled in an ice bath overnight. After cooling, the solution was acidified with hydrochloric acid (HCl). The crude product precipitated after acidification was collected, washed with 50 mL of water and dried in an oven at 105°C-110°C for about 4 hours. Finally, thiobarbituric acid (TBA) was purified by ethanol recrystallization to give a melting point of about 243°C and a yield of about 80%.
Purification Methods
Crystallise it from water. [Beilstein 24 H 476, 24 I 414, 24 II 275, 24 III/IV 1884.]
References
[1] Oriental Journal of Chemistry, 2017, vol. 33, # 1, p. 304 - 317
[2] Medicinal Chemistry Research, 2013, vol. 22, # 9, p. 4075 - 4086
[3] Chemistry of Natural Compounds, 2001, vol. 37, # 6, p. 543 - 550
[4] Journal of Medicinal Chemistry, 2007, vol. 50, # 8, p. 1778 - 1786
[5] Bioorganic and Medicinal Chemistry Letters, 2007, vol. 17, # 14, p. 3953 - 3956
2-Thiobarbituric acid Preparation Products And Raw materials
Raw materials
1of2
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Tangshan Moneide Trading Co., Ltd. | +86-315-8309571 +8615633399667 | sales@moneidechem.com | China | 574 | 58 |
| Hebei Yanxi Chemical Co., Ltd. | +8618531123677 | faithe@yan-xi.com | China | 5853 | 58 |
| Hebei Chuanghai Biotechnology Co., Ltd | +8615531151365 | mina@chuanghaibio.com | China | 18126 | 58 |
| Anhui Ruihan Technology Co., Ltd | +8617756083858 | daisy@anhuiruihan.com | China | 973 | 58 |
| Henan Fengda Chemical Co., Ltd | +86-371-86557731 +86-13613820652 | info@fdachem.com | China | 20124 | 58 |
| Capot Chemical Co.,Ltd. | +86-（0）57185586718; +8613336195806 | sales@capot.com | China | 29640 | 60 |
| Beijing Cooperate Pharmaceutical Co.,Ltd | 010-60279497 | sales01@cooperate-pharm.com | CHINA | 1803 | 55 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21592 | 55 |
| career henan chemical co | +86-0371-86658258 +8613203830695 | sales@coreychem.com | China | 29821 | 58 |
| Jinan Finer Chemical Co., Ltd | +86-531-88989536 +86-15508631887 | sales@finerchem.com | China | 2949 | 58 |
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View Lastest Price from 2-Thiobarbituric acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-04-24 | 2-Thiobarbituric acid
504-17-6
|
US $0.00 / KG | 1KG | 98%min | 30tons/month | WUHAN FORTUNA CHEMICAL CO., LTD | |
 |
2026-04-22 | Thiobarbituric acid
504-17-6
|
US $56.00-133.00 / mg | 99.89% | 10g | TargetMol Chemicals Inc. | ||
 |
2025-09-25 | 4,6-Dihydroxy-2-mercaptopyrimidine
504-17-6
|
US $10.00-0.80 / KG | 1KG | 99% | g-kg-tons, free sample is available | Henan Fengda Chemical Co., Ltd |
-
- 2-Thiobarbituric acid
504-17-6
- US $0.00 / KG
- 98%min
- WUHAN FORTUNA CHEMICAL CO., LTD
-
- Thiobarbituric acid
504-17-6
- US $56.00-133.00 / mg
- 99.89%
- TargetMol Chemicals Inc.
-
- 4,6-Dihydroxy-2-mercaptopyrimidine
504-17-6
- US $10.00-0.80 / KG
- 99%
- Henan Fengda Chemical Co., Ltd
