5-Methyl-5-phenylhydantoin

Also known as: 5-Methyl-5-phenyl-2,4-imidazolidinedione, 5-Methyl-5-phenylimidazolidine-2,4-dione, 2,4-Imidazolidinedione, 5-methyl-5-phenyl-, 5-methyl-5-phenyl-4-imidazolidinedione, EINECS 229-928-6, MFCD00005265

5-Methyl-5-phenylhydantoin (CAS 6843-49-8) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C10H10N2O2 and a molecular weight of 190.19900 g/mol. Key properties include a melting point of 199-201ºC(lit.), a density of 1.138g/cm3 and a flash point of 9 °C. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H311 — Toxic in contact with skin and H332 — Harmful if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 6843-49-8
Jingsj CID: J-27427-1
Molecular Formula: C₁₀H₁₀N₂O₂
Molecular Weight: 190.19900 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	199-201ºC(lit.)
Density	1.138g/cm3
Flash Point	9 °C
Exact Mass	190.07400
PSA	58.20000
LogP	1.39880
Refractive Index	1.505

GHS Safety & Compliance

Acute Toxicity / Health HazardSignal word: Danger

H301 — Toxic if swallowed
H311 — Toxic in contact with skin
H332 — Harmful if inhaled
H370 — Causes damage to organs

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-Methyl-5-phenylhydantoin?

The CAS number of 5-Methyl-5-phenylhydantoin is 6843-49-8.

What are the molecular formula and molecular weight of 5-Methyl-5-phenylhydantoin?

5-Methyl-5-phenylhydantoin has molecular formula C10H10N2O2 and molecular weight 190.19900 g/mol.

Is 5-Methyl-5-phenylhydantoin hazardous?

5-Methyl-5-phenylhydantoin has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H311 — Toxic in contact with skin; H332 — Harmful if inhaled.

What are the upstream and downstream products of 5-Methyl-5-phenylhydantoin?

For 5-Methyl-5-phenylhydantoin, Upstream Products: Acetophenone, Carbon dioxide, Ammonium bicarbonate; Downstream Products: 2-Amino-2-phenylpropionic acid, (2S)-2-AMINO-2-PHENYLPROPANOIC ACID, 2-(4-methyl-2,5-dioxo-4-phenylimidazolidin-1-yl)acetic acid.

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. "5-Methyl-5-phenylhydantoin (CAS 6843-49-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-27427-1 (accessed 2026-11-09).

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