1,3-Diazaspiro[4.4]nonane-2,4-dione

Also known as: 1,3-Diazaspiro[4.4]nonane-2,4-dione, 5,5-Tetramethylenehydantoin, 5,5'-Cyclopentanespirohydantoin, Hydantoin-5-spirocyclopentane, Spiro[cyclopentane-1,5'-hydantoin], NSC 1024, Ba 2839

1,3-Diazaspiro[4.4]nonane-2,4-dione (CAS 699-51-4) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C7H10N2O2 and a molecular weight of 154.167 g/mol. Key properties include a melting point of 199-205°C and a density of 1.3±0.1 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 699-51-4
Jingsj CID: J-1511154-3
Molecular Formula: C₇H₁₀N₂O₂
Molecular Weight: 154.167 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	199-205°C
Density	1.3±0.1 g/cm3
Exact Mass	154.074234
PSA	58.20000
LogP	-0.18
Refractive Index	1.560

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 1,3-Diazaspiro[4.4]nonane-2,4-dione?

The CAS number of 1,3-Diazaspiro[4.4]nonane-2,4-dione is 699-51-4.

What are the molecular formula and molecular weight of 1,3-Diazaspiro[4.4]nonane-2,4-dione?

1,3-Diazaspiro[4.4]nonane-2,4-dione has molecular formula C7H10N2O2 and molecular weight 154.167 g/mol.

What are the upstream and downstream products of 1,3-Diazaspiro[4.4]nonane-2,4-dione?

For 1,3-Diazaspiro[4.4]nonane-2,4-dione, Upstream Products: Cyclopentanone, Hydantoin, Ammonium carbonate; Downstream Products: 1-[(tert-Butoxycarbonyl)amino]cyclopentanecarboxylic acid, Methyl 1-amino-1-cyclopentanecarboxylate, Cycloleucine.

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. "1,3-Diazaspiro[4.4]nonane-2,4-dione (CAS 699-51-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1511154-3 (accessed 2026-11-09).

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