5,5-Dimethylhydantoin
Also known as: 5,5-Dimethylimidazolidine-2,4-dione, 5,5-Dimethyl-2,4-imidazolidinedione, 5,5-Dimethylhydantoin, DMH, Dantoin DMH, NSC 8652
5,5-Dimethylhydantoin (CAS 77-71-4) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C5H8N2O2 and a molecular weight of 128.13100 g/mol. Key properties include a melting point of 175-180ºC, a density of 1.1±0.1 g/cm3 and a flash point of 193ºC. No supplier offers are currently listed; request a quote. Record last updated Nov 4, 2026.
- CAS No.
- 77-71-4
- Jingsj CID
- J-21570-3
- Molecular Formula
- C5H8N2O2
- Molecular Weight
- 128.13100 g/mol
- Category
- Organic Compounds
- Last updated
- 11/4/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 175-180ºC |
|---|---|
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 193ºC |
| Exact Mass | 128.058578 |
| PSA | 58.20000 |
| LogP | -0.66 |
| Refractive Index | 1.449 |
| Additional Property | H2O: 0.1 g/mL hot, clear | soluble |
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 5,5-Dimethylhydantoin?
The CAS number of 5,5-Dimethylhydantoin is 77-71-4.
What are the molecular formula and molecular weight of 5,5-Dimethylhydantoin?
5,5-Dimethylhydantoin has molecular formula C5H8N2O2 and molecular weight 128.13100 g/mol.
What are the upstream and downstream products of 5,5-Dimethylhydantoin?
For 5,5-Dimethylhydantoin, Upstream Products: 1,3-Dibromo-5,5-dimethylhydantoin; Downstream Products: Diethyl hydrazodicarboxylate, 1,5,5-Trimethylhydantoin, 1,3-Dibromo-5,5-dimethylhydantoin.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5,5-Dimethylhydantoin (CAS 77-71-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-21570-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.