(±)-Mephenytoin
[CAS 50-12-4]

Identification

• Classification: API >> Nervous system medication >> Antiepileptic and anticonvulsant
• Name: (±)-Mephenytoin
• Synonyms: 3-Methyl-5-ethyl-5-phenylhydantoin
• Molecular Formula: C₁₂H₁₄N₂O₂
• Molecular Weight: 218.26
• CAS Registry Number: 50-12-4
• EC Number: 200-012-8

Properties

• Solubility: Slightly soluble (3.1 g/L) (25 °C), Calc.^*
• Density: 1.154±0.06 g/cm³ (20 °C 760 Torr), Calc.^*
• Melting point: 136-137 °C^**

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2013 ACD/Labs)

^** CH 166004 1934.

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute toxicity	Acute Tox.	4	H302
Skin irritation	Skin Irrit.	2	H315
Specific target organ toxicity - single exposure	STOT SE	3	H335
Eye irritation	Eye Irrit.	2	H319
Reproductive toxicity	Repr.	2	H361
Eye irritation	Eye Irrit.	2A	H319
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412