3-Methyl-4-methylene-3,4-dihydroquinazoline-2(1H)-thione

Also known as: 2-Thioxo-3-methyl-4-methylen-1.2.3.4-tetrahydro-chinazolin, 3-Methyl-4-methylen-3,4-dihydro-1H-chinazolin-2-thion, 3-methyl-4-methylene-3,4-dihydro-1H-quinazoline-2-thione, 3-methyl-4-methylene-3,4-dihydroquinazoline-2(1H)-thione, 3-methyl-4-methylidene-1,2,3,4-tetrahydroquinazoline-2-thione, 3-methyl-4-methylidene-1H-quinazoline-2-thione

3-Methyl-4-methylene-3,4-dihydroquinazoline-2(1H)-thione (CAS 14333-74-5) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C10H10N2S and a molecular weight of 190.26500 g/mol. Key properties include a boiling point of 293.4ºC at 760mmHg, a density of 1.25g/cm3 and a flash point of 131.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 14333-74-5
Jingsj CID: J-1496706-7
Molecular Formula: C₁₀H₁₀N₂S
Molecular Weight: 190.26500 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	293.4ºC at 760mmHg
Density	1.25g/cm3
Flash Point	131.3ºC
Exact Mass	190.05600
PSA	56.62000
LogP	1.55340
Vapor Pressure	0.00173mmHg at 25°C
Refractive Index	1.683

Customs & Trade Information

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 3-Methyl-4-methylene-3,4-dihydroquinazoline-2(1H)-thione?

The CAS number of 3-Methyl-4-methylene-3,4-dihydroquinazoline-2(1H)-thione is 14333-74-5.

What are the molecular formula and molecular weight of 3-Methyl-4-methylene-3,4-dihydroquinazoline-2(1H)-thione?

3-Methyl-4-methylene-3,4-dihydroquinazoline-2(1H)-thione has molecular formula C10H10N2S and molecular weight 190.26500 g/mol.

What are the upstream and downstream products of 3-Methyl-4-methylene-3,4-dihydroquinazoline-2(1H)-thione?

For 3-Methyl-4-methylene-3,4-dihydroquinazoline-2(1H)-thione, Upstream Products: 2'-Aminoacetophenone, Methyl isothiocyanate.

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

Last updated: 8/21/2026

How to cite: Jingsj. "3-Methyl-4-methylene-3,4-dihydroquinazoline-2(1H)-thione (CAS 14333-74-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1496706-7 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.