4,5-Diaminouracil

Also known as: 5,6-Diaminopyrimidine-2,4(1H,3H)-dione, 5,6-Diamino-2,4(1H,3H)-pyrimidinedione, 5,6-Diaminouracil, 2,4-Dihydroxy-5,6-diaminopyrimidine, 5,6-Diamino-1H-pyrimidine-2,4-dione, 5,6-Diaminopyrimidine-2,4-diol, 5,6-Diamino-2,4-dihydroxypyrimidine

4,5-Diaminouracil (CAS 3240-72-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C4H6N4O2 and a molecular weight of 142.11800 g/mol. Key properties include a melting point of >250ºC, a boiling point of 778.7ºC at 760 mmHg and a flash point of 424.7ºC. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.

CAS No.: 3240-72-0
Jingsj CID: J-1516625-3
Molecular Formula: C₄H₆N₄O₂
Molecular Weight: 142.11800 g/mol
Category: Pharma Intermediates
Last updated: 11/3/2026

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Physicochemical Properties

Melting Point	>250ºC
Boiling Point	778.7ºC at 760 mmHg
Flash Point	424.7ºC
Exact Mass	178.025757
PSA	117.76000
LogP	0.19200
Storage Conditions	-20°C Freezer

Customs & Trade Information

HS Code	2933599090
Summary	2933599090. other compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure. 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 4,5-Diaminouracil?

The CAS number of 4,5-Diaminouracil is 3240-72-0.

What are the molecular formula and molecular weight of 4,5-Diaminouracil?

4,5-Diaminouracil has molecular formula C4H6N4O2 and molecular weight 142.11800 g/mol.

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

Last updated: 11/3/2026

How to cite: Jingsj. "4,5-Diaminouracil (CAS 3240-72-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1516625-3 (accessed 2026-11-09).

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