Active ingredients vary by product version, including:

• Bengay: Original – 18.3% methyl salicylate and 16% menthol.
• Bengay: Muscle Pain/Ultra Strength – 30% methyl salicylate, 10% menthol, and 4% camphor.
• Bengay: Ice Extra Strength – 10% menthol.
• Bengay: Muscle Pain/No Odor – 15% triethanolamine salicylate.
• Bengay: Arthritis Extra Strength – 30% methyl salicylate and 8% menthol.

Ref:- https://en.wikipedia.org/wiki/Bengay#Active_ingredients