It's general biochemical name is an Antigen - anti = against and gen = genesis.
The primary allergen is a protein called Fel d 1 that is produced by cat saliva and sebaceous glands, which causes either an allergic or asthmatic response.
Allergen
A change in an organism's environment that causes it to react is called a stimulus. Stimuli can be physical, chemical, or biological factors that trigger a response in an organism to help it adapt and survive in its environment.
Allergic responses refer to immune responses that adversely affect the host, by mistakenly targeting harmless substances and triggering an inappropriate reaction. This leads to symptoms such as inflammation, itching, and swelling.
Antihistamines block the release of histamine, a substance that causes allergic reactions.
what chemical weathering called oxidation causes
I have no idea but I have the same issue. As far as I know I'm not allergic to anything else.
Harmless plant proteins
No, an allergic reaction is typically caused by a release of histamines from the eosinophils. Antibodies are produced by lymphocytes in response to a bacterial infection.
The chemical in poison ivy, poison oak, and poison sumac that causes allergic reactions is called urushiol. It is a resin oil found in the sap of these plants and can trigger skin irritation and rashes in individuals who come into contact with it.
The chemical in marijuana that causes a high is called tetrahydrocannabinol (THC).
Stimulus.