S-Methylthiobarbituric acid

S-Methylthiobarbituric acid - Names and Identifiers

Name	4,6-dihydroxy-2-methylmercaptopyrimidine
Synonyms	S-MTBA NSC 44557 S-METHYLTHIOBARBITURIC ACID S-Methylthiobarbituric acid 2-Methylthiopyrimidine-4,6-diol 2-Methylthio-4,6-pyrimidinedione 4,6-Dihydroxy-2-methythiopyrimidine 4,6-Dihydroxy-2-methylthio pyrimidine 2-(Methylmercapto)-4,6-pyrimidinediol 6-Hydroxy-2-(Methylthio)-4-pyriMidinone 4,6-dihydroxy-2-methylmercaptopyrimidine 6-Hydroxy-2-(methylthio)pyrimidin-4(3H)-one 2-(methylsulfanyl)pyrimidine-4,6(1H,5H)-dione 6-hydroxy-2-(methylsulfanyl)pyrimidin-4(3H)-one 4-Hydroxy-2-(methylthio)pyrimidin-6(1H)-one, 4,6-Dihydroxy-2-(methylthio)pyrimidine, 2-(Methylsulphanyl)pyrimidine-4,6-diol
CAS	1979-98-2 29639-68-7
EINECS	217-839-5
InChI	InChI=1/C5H6N2O2S/c1-10-5-6-3(8)2-4(9)7-5/h2H2,1H3,(H,6,7,8,9)

S-Methylthiobarbituric acid - Physico-chemical Properties

Molecular Formula	C5H6N2O2S
Molar Mass	158.18
Density	1.55±0.1 g/cm3(Predicted)
Melting Point	>300°C(lit.)
Boling Point	296.5℃ at 760 mmHg
Solubility	Ethyl Acetate, Ethanol, Methanol
Appearance	White crystal
Color	White
pKa	4.06±0.10(Predicted)
Storage Condition	Keep in dark place,Sealed in dry,Room Temperature
Refractive Index	1.678
MDL	MFCD00006087
Physical and Chemical Properties	This product is white powder solid, M.P.> 360℃, insoluble in water.

S-Methylthiobarbituric acid - Risk and Safety

Safety Description	S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes.
WGK Germany	2
HS Code	29339900

S-Methylthiobarbituric acid - Reference Information

Use

4, 6-dihydroxy-2-methylthiopyrimidine is the herbicide fluorimuron imuron and pyrimidine salicylic acid herbicides diimuron (bispyribac),pyriminobac and imuron sulfide (pyrithiobac) intermediate.

production method

the preparation method is to add diethyl malonate, thiourea and solvent to the reaction bottle, heat to reflux, add acid binding agent dropwise, react for several hours, cool, and filter to obtain 4, 6-dihydroxy-2-mercaptopyrimidine. Then, the thiopyrimidine is dissolved in the acid binding agent, dimethyl sulfate is added, and after stirring for several hours, the reaction liquid is heated to boiling, and then activated carbon is added to decolorization and filter, and the filtrate is cooled and acidified with sulfuric acid to generate white crystals as finished products. Using diethyl malonate to react with S-methyl isothiourea salt, 2-methylthio -4, 6-dihydroxypyrimidine can also be obtained.

Last Update：2024-04-09 20:48:19

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CAS: 1979-98-2/29639-68-7
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