Other names: Ferric oxide, Hematite, Ferric ironRed iron oxide, Rouge, Maghemite, Colcothar, Iron sesquioxide, Rust, Ochre, Iron oxide dust and fume (as Fe), Iron oxide red, Red oxide, Anhydrous ferric oxide, Iron (III) oxide, Diiron trioxide, Iron trioxide, Ferric sesquioxide, Iron(III) oxide [Iron oxide dust and fume (as Fe)], Iron(III)oxide [Rouge]
Appearance: Red-brown solid ; Reddish brown-to-black crystals or powder ; Reddish-brown solid. [Note: Exposure to fume may occur during the arc-welding of iron.] ; A fine, red powder of ferric oxide. [Note: Usually used in cake form or impregnated in paper or cloth.]
CO2
Names: Carbon dioxide, {{plainlist|, CO2Carbonic acid gas, Dry ice, [CO2], Carbonic anhydride, R-744, E-290, E 290, E290, Carbonic acid anhydride, Carbon-12 dioxide, Methanedione, Carbon oxide, CO₂, [Note: Normal constituent of air (about 300 ppm)].
Appearance: Colorless gas ; Odourless colourless compressed liquefied gas ; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.]