Other names: Carbonate of potash, Dipotassium carbonate, Sub-carbonate of potashPearl ash, Potash, Salt of tartar, Salt of wormwood., Potassium carbonate (anhydrous), K2CO3, Carbonic acid, dipotassium salt, Potassium carbonate, anhydrous, Kaliumcarbonat, Potash, sulfurated
Appearance: White, hygroscopic solid ; Colourless hygroscopic crystals or hygroscopic white powder
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.]
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.]