(R)-(-)-Mephenytoin
[CAS# 71140-51-7]

Identification

• Name: (R)-(-)-Mephenytoin
• Synonyms: (5R)-5-ethyl-3-methyl-5-phenylimidazolidine-2,4-dione
• Molecular Formula: C₁₂H₁₄N₂O₂
• Molecular Weight: 218.25
• CAS Registry Number: 71140-51-7
• EC Number: 621-692-6
• SMILES: CC[C@]1(C(=O)N(C(=O)N1)C)C2=CC=CC=C2

Properties

• Solubility: 1267 mg/L (25 °C water)
• Density: 1.2±0.1 g/cm³, Calc.^*
• Index of Refraction: 1.541, Calc.^*
• Melting point: 179.82 °C

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software.

Safety Data

• Hazard Symbols: GHS07 Warning
• Risk Statements: H302-H315-H319-H335
• Safety Statements: P261-P264-P264+P265-P270-P271-P280-P301+P317-P302+P352-P304+P340-P305+P351+P338-P319-P321-P330-P332+P317-P337+P317-P362+P364-P403+P233-P405-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute toxicity	Acute Tox.	4	H302
Skin irritation	Skin Irrit.	2	H315
Eye irritation	Eye Irrit.	2	H319
Specific target organ toxicity - single exposure	STOT SE	3	H335