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Dihydro-1,3-dimethyl-2-thioxo-4,6(1H,5H)-pyrimidinedione

1,3-二甲基-2-硫代巴比妥酸

Also known as: 1,3-Dimethyl-2-thiobarbituric acid, 1,3-Dimethyl-2-thioxodihydro-4,6(1H,5H)-pyrimidinedione, N,N'-Dimethyl-2-thiobarbituric acid, 4,6(1H,5H)-Pyrimidinedione, dihydro-1,3-dimethyl-2-thioxo-, dimethyl thiobarbituric acid, Roxatidine Impurity 2-d10 (Roxatidine Acetate HCl-d10)

Dihydro-1,3-dimethyl-2-thioxo-4,6(1H,5H)-pyrimidinedione (CAS 3158-63-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H8N2O2S and a molecular weight of 172.20500 g/mol. It is also known as 1,3-Dimethyl-2-thiobarbituric acid, 1,3-Dimethyl-2-thioxodihydro-4,6(1H,5H)-pyrimidinedione and N,N'-Dimethyl-2-thiobarbituric acid. Key properties include a melting point of 183ºC, a boiling point of 238ºC, a density of 1.4 and a flash point of 98ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
3158-63-2
Jingsj CID
J-1311715-9
Molecular Formula
C6H8N2O2S
Chinese Name
1,3-二甲基-2-硫代巴比妥酸
Molecular Weight
172.20500 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point183ºC
Boiling Point238ºC
Density1.4
Flash Point98ºC

Frequently Asked Questions

What is the CAS number of Dihydro-1,3-dimethyl-2-thioxo-4,6(1H,5H)-pyrimidinedione?

The CAS number of Dihydro-1,3-dimethyl-2-thioxo-4,6(1H,5H)-pyrimidinedione is 3158-63-2.

What are the molecular formula and molecular weight of Dihydro-1,3-dimethyl-2-thioxo-4,6(1H,5H)-pyrimidinedione?

Dihydro-1,3-dimethyl-2-thioxo-4,6(1H,5H)-pyrimidinedione has molecular formula C6H8N2O2S and molecular weight 172.20500 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Dihydro-1,3-dimethyl-2-thioxo-4,6(1H,5H)-pyrimidinedione (CAS 3158-63-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1311715-9 (accessed 2026-10-25).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.