The smell, known as off-gassing, is a normal and safe result of manufacturing and usually fades over time. Air out the pillow for several days or use the "sleeping bag method" by rolling it tightly to reduce odor. If the pillow has a removable cover, wash it before use; see detailed instructions at Tempur-Pedic's Product Care page.
The smell you are referring to is known as off-gassing, and is a completely normal and safe outcome of the manufacturing process. While unpleasant, this smell usually dissipates over time.
We recommend allowing the pillow to air out for several days before use. In addition, you may try the sleeping bag method, which involves rolling the pillow up tightly, similar to a sleeping bag. This can help push out any off‑gassing odor.
If your pillow comes with a removable cover, you can remove and wash the cover before use. For detailed cover‑cleaning instructions, please view them here: Product Care | Tempur-Pedic.