6-甲基-2-硫代-1H-嘧啶-4-酮

Description

6-methyl-2-thioxo-1H-pyrimidin-4-one · CAS 56-04-2 · C5H6N2OS. UNII QW24888U5F. Other Experimental Properties: DECOMP @ 326-331 °C..

Identification

CAS Registry Number	56-04-2
PubChem CID	667493
Molecular formula	C5H6N2OS
IUPAC name	6-methyl-2-sulfanylidene-1H-pyrimidin-4-one
UNII (FDA)	QW24888U5F

Computed Descriptors

Molecular Weight	142.18
XLogP3	-0.2
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	0
Exact Mass	142.02008399
Monoisotopic Mass	142.02008399
Topological Polar Surface Area	73.2
Heavy Atom Count	9
Formal Charge	0

Physical & Chemical Properties

Other Experimental Properties	DECOMP @ 326-331 °C.

Physical description & handling notes

• Methylthiouracil appears as white crystalline powder with an odor of onions and a bitter taste. A saturated aqueous solution is neutral or slightly acidic. (NTP, 1992)
• CRYSTALS
• PLATES FROM WATER
• WHITE, CRYSTALLINE POWDER
• ODORLESS
• BITTER

Regulatory Status

GHS notification summary	1.7% (1 / 59)

GHS Hazard Classification

GHS notification summary	1.7% (1 / 59)
Reported hazard statements	H302 (91.5%), H351 (79.7%), H372

Documented Uses

• Pharmaceuticals -> Animal Drugs -> Approved in Taiwan
• ACETOACETIC ESTER IS CONDENSED VIA HYDRATION & DE-ETHANOLATION WITH THIOUREA.
• (1975) NOT PRODUCED COMMERCIALLY IN USA
• (1977) NOT PRODUCED COMMERCIALLY IN USA
• 4(1H)-Pyrimidinone, 2,3-dihydro-6-methyl-2-thioxo-: ACTIVE
• /IT IS/ THE METHYL ANALOG OF PROPYLTHIOURACIL ... .

Synonyms

methylthiouracil; 6-Methyl-2-thiouracil; 56-04-2; Thimecil; Alkiron; Methiocil; Basethyrin; Prostrumyl; Thiomecil; Thiothymin; Metacil; 2-Thio-6-methyluracil; Antibason; Methiacil; Methicil; Strumacil

Frequently Asked Questions

What are the CAS number and molecular formula of 6-methyl-2-thioxo-1H-pyrimidin-4-one?

CAS 56-04-2; molecular formula C5H6N2OS; molecular weight — g/mol.

What other names is 6-methyl-2-thioxo-1H-pyrimidin-4-one known by?

methylthiouracil, 6-Methyl-2-thiouracil, 56-04-2, Thimecil, Alkiron, Methiocil.

Is 6-methyl-2-thioxo-1H-pyrimidin-4-one classified as hazardous?

1.7% of GHS notifications report no hazard classification (1 of 59).

What are the key physical properties of 6-methyl-2-thioxo-1H-pyrimidin-4-one?

Other Experimental Properties: DECOMP @ 326-331 °C..

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.