苯佐卡因（Benzocaine），又称“阿奈斯台辛”（Anaesthesine），学名对氨基苯甲酸乙酯。

无色或白色斜方结晶粉末。无臭，味微苦，后有麻醉感。遇光逐渐变色。难溶于水，微溶于脂肪油，溶于稀酸、乙醇、乙醚、氯仿、杏仁油、橄榄油。

Benzocaine is a local anesthetic commonly used as a topical pain reliever or in cough drops. It is the active ingredient in many over-the-counter anesthetic ointments such as products for oral ulcers. It is also combined with antipyrine to form A/B otic drops to relieve ear pain and remove earwax.