Chemical repellents can be an effective method for controlling deer populations, but it's important to use them correctly and in compliance with local regulations. Here are a few examples of chemical repellents that are commonly used for deer control:

Thiram: This fungicide can also act as a repellent for deer, it is often used as a spray or granular form to protect plants and crops.

Hot pepper spray: Capsaicin, the chemical that makes hot peppers spicy, can also be used to make plants unappealing to deer. This can be made by mixing hot pepper flakes or powder with water and then spray the mixture on plants.

Garlic: Garlic can be made into a repellent by blending it with water and then sprayed on plants.

Egg-based repellents: Eggs can be used to make a repellent spray, which can be made by mixing eggs with water, and then spraying the mixture on plants.

Ammonia: Ammonia-soaked rags or a spray solution can also be used as a repellent, it produces a strong odor that deer find unappealing.

It's important to note that the effectiveness of these repellents can vary depending on the specific location and situation, and it's always a good idea to test a small area before applying repellents to large areas or important crops. Additionally, it's important to comply with local regulations, read the label carefully, and follow the instructions for application, storage, and disposal of any chemical repellents. Furthermore, keep in mind that chemicals can be toxic, and some can be harmful to people, animals, and the environment, so always use them with caution.