What are welding MSDs?

Actually it is MSDS - Manufacturers Safety Data Sheets. They include any and all chemicals, elements, or organics that could be harmful to the user. For example electrode coatings contain ingredients that if, inhaled, could cause lung damage. Argon is an inert gas and you can drown in it. All manufacturers must supply these (MSDS) to any users who request them. At the Vocational Center we had to maintain a file on any/all items we used. Paints contain chemicals that contain poisonous ingredients. Spray cans contain flammable gasses.