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The most commonly used chemicals in photography are:
developers: e.g. hydroquinone, p-aminopheno,l metol (4-methyl aminophenol sulfate), diethanolamine bisulfite, diethylene glycol, diethanolamine, sodium polysulfide, phenidione.
developer replenishers: e.g. sodium hydroxide
stop bath: e.g. acetic acid
fixer: e.g. sodium thosulfat, ammonium thiosulfate
film cleaner: e.g. naphtha
reversal solutions: e.g. potassium dichromate
brown (sepia) toner: e.g. sodium polysulfide
Most of these chemicals present a low risk to students when using proprietary or diluted solutions. Teachers should be aware that concentrated solutions (glacial acetic acid) and pure chemicals (sodium polysulphide) pose a significant risk and may take the appropriate precautions when using them. See individual listing for each chemical in Appendix D). Some practical disposal advice for photographic chemicals can be found in Appendix E.
Appendix D and Appendix E.
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