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CAS NO.: 94268-29-8;4-(azetidin-3-yl)benzonitrile hydrochloride. PROPERTIES: This azetidine-containing nitrile salt presents as a white hygroscopic powder with a molecular weight of approximately 209.6 g/mol (free base). The 4-(azetidin-3-yl)benzonitrile hydrochloride combines a nitrile group with a substituted azetidine ring. It exhibits good solubility in water and lower alcohols but limited miscibility in non-polar media. Stability characterization reveals tendency to form hydrates above 35% relative humidity, necessitating storage at 2-8 degree Celsius in sealed polyethylene containers. Handlers should employ deliquescence-resistant tools and maintain environmental humidity below 30%. Skin contact may cause chemical burns in presence of moisture. Inhalation may induce bronchial hyperreactivity; treatment includes anticholinergic inhalers. Eye exposure requires extended rinsing and possible corticosteroid application. Waste should be neutralized with sodium bicarbonate prior to disposal. APPLICATIONS: The 4-(azetidin-3-yl)benzonitrile hydrochloride serves as a key intermediate in the synthesis of azetidine-containing pharmaceuticals. Its nitrile group provides opportunities for reduction to primary amines or hydrolysis to carboxylic acids. Research teams utilize this compound as a starting material for creating muscarinic receptor modulators and dual serotonin-norepinephrine reuptake inhibitors. The azetidine ring undergoes reductive amination for constructing tertiary amines with defined stereochemistry. Additionally, it serves as a building block for creating kinase inhibitors with enhanced metabolic stability. The compound's unique substitution pattern makes it valuable in the development of GPCR modulators and ion channel inhibitors.