2-Amino-5,6,7,8-tetrahydro-3H-quinazolin-4-one

Also known as: 2-Amino-4-hydroxy-5,6,7,8-tetrahydroquinazoline, 2-Amino-5,6,7,8-tetrahydroquinazolin-4-ol, 2-Amino-5,6,7,8-tetrahydro-4-quinazolinol, 4-Hydroxy-5,6,7,8-tetrahydroquinazolin-2-amine, 2-Amino-5,6,7,8-tetrahydro-1H-quinazolin-4-one

2-Amino-5,6,7,8-tetrahydro-3H-quinazolin-4-one (CAS 33081-07-1) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C8H11N3O and a molecular weight of 165.19200 g/mol. Key properties include a boiling point of 337.4ºC at 760 mmHg, a density of 1.53g/cm3 and a flash point of 157.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 33081-07-1
Jingsj CID: J-1036007-3
Molecular Formula: C₈H₁₁N₃O
Molecular Weight: 165.19200 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	337.4ºC at 760 mmHg
Density	1.53g/cm3
Flash Point	157.9ºC
Exact Mass	165.09000
PSA	72.03000
LogP	1.22440
Refractive Index	1.734

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 2-Amino-5,6,7,8-tetrahydro-3H-quinazolin-4-one?

The CAS number of 2-Amino-5,6,7,8-tetrahydro-3H-quinazolin-4-one is 33081-07-1.

What are the molecular formula and molecular weight of 2-Amino-5,6,7,8-tetrahydro-3H-quinazolin-4-one?

2-Amino-5,6,7,8-tetrahydro-3H-quinazolin-4-one has molecular formula C8H11N3O and molecular weight 165.19200 g/mol.

What are the upstream and downstream products of 2-Amino-5,6,7,8-tetrahydro-3H-quinazolin-4-one?

For 2-Amino-5,6,7,8-tetrahydro-3H-quinazolin-4-one, Upstream Products: Guanidine hydrochloride, Ethyl 2-oxocyclohexanecarboxylate; Downstream Products: 4-chloro-5,6,7,8-tetrahydroquinazolin-2-amine.

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. "2-Amino-5,6,7,8-tetrahydro-3H-quinazolin-4-one (CAS 33081-07-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1036007-3 (accessed 2026-11-09).

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