Sodium Hydroxide
Yes. If it is on the skin long enough and in a high enough concentration, it can cause chemical burns to the skin.
Na2S, also known as sodium sulfide, is a chemical compound that, when exposed to moist air, smells like rotten eggs. It not only causes skin burns, but it is toxic.
Seamen can cause intense burning sensation who pain is only surpassed by white phosphorous if it lands on you face you will die a virgin
What procedure to follow if exposed skin comes in contact with any chemical substance
Crazy glue will not cause burns but if you accidentally use it to glue your skin, separating it may feel like burns.
No
because it takes a while for the skin to change color
Yes. Ammonia is a caustic substance and can cause chemical burns to skin. You should avoid contact as much as possible. If contact does occur and it burns at all, flush the exposed area with running water.
powder
If you mean 'Alkali (s) , or base, it is the opposite of an acid. And like acids on skin, it can cause and feel like burns - it can actually cause chemical burns. I have had such an experience from hydrochloric acid personally, and it is very painful. So alkalis can cause chemical burns, and cause a burning feeling on exposed skin.
Exposed Skin
Yes, burns of all sorts do weaken the immune system to some extent. The higher the degree the burn, the more susceptible you are to infection because of the exposed raw skin.
Ultra-violet radiation, on certain individuals of white skin who are exposed under too much sunlight.
Burns are classified into three categories based on their severity: First-degree burns: These affect only the outer layer of skin and are characterized by redness and minor pain. Second-degree burns: These extend into the second layer of skin and are marked by blisters, pain, and redness. Third-degree burns: These are the most severe and damage all layers of the skin, potentially reaching deeper tissues and resulting in white or charred skin.
There are many products that are recommended for regularly exposed skin. One can find them at drugstores and pharmacies. One of the products used to treat exposed skin is Exposed Skin Care by Exposed Acne Treatment. It is also offered online at Amazon.
Yes you can. This Neosporin powder is used to treat minor wounds like cuts, burns, scrapes etc., and also help to prevent mild skin infections.
20 and 30 degree burns do not exist. But 1, 2, and 3 degree burns exist. 1 - burns affect only the outer layer of the skin. They cause pain, redness, and swelling. 2 - (partial thickness) burns affect both the outer and underlying layer of skin. They cause pain, redness, swelling, and blistering. 3 - (full thickness) burns extend into deeper tissues. They cause white or blackened, charred skin that may be numb.