Citrus aurantium, also known as Bitter Orange or Seville Orange, refers to the citrus tree Citrus sinensis and its fruit. The orange is a hybrid of ancient cultivated origin, possibly between pomelo (Citrus maxima) and tangerine (Citrus reticulata). It is a small tree, growing to about 10 m tall, with thorny shoots and evergreen leaves 4-10 cm long. Oranges originated in southeast Asia, in either India or modern day Pakistan, Vietnam or southern China. The fruit of Citrus sinensis is called sweet orange to distinguish it from Citrus aurantium, the bitter orange.

Neohesperidin dihydrochalcone, sometimes abbreviated to neohesperidin DC or simply NHDC, is an artificial sweetener derived from citrus. It's particularly effective in masking the bitter tastes of other compounds found in citrus, including limonin and naringin. Industrially, it is produced by extracting neohesperidin from the bitter orange, and then hydrogenating this to make NHDC.

• Flavor Enhancer: NHDC is used in a wide range of products and is noted particularly for enhancing sensory effects.
• Bitterness Masking: Ideal for use in naturally bitter products. Pharmaceutical companies utilize the product to reduce the bitterness of pharmacological drugs in tablet form.
• Livestock Feed: Used for livestock feed as a means of reducing feeding time.
• Versatile Ingredients: Found in a wide variety of alcoholic and non-alcoholic beverages, savoury foods, toothpaste, mouthwash, and condiments such as ketchup and mayonnaise.

• Beverages: Fruit juice, carbonated beverages, concentrated powder, syrup, black beer, iced tea, grapefruit juice, cola drinks, orange juice, milk and derivatives, water-based condiments, and alcoholic beverages.
• Chewing Gum
• Food Products: Chocolate food, bread, cake, yoghurt, and ice cream.
• Cake & Candy: Chocolate food, dried fruit, bread, jam, jelly, sweetmeats, fruit juice, preserved fruit, baked food, and low-calorie food.
• Spices & Condiments: Bechamel, soup bases, fish condiments, etc.
• Pharmaceutical Products: Active bitter masking agent.