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Appendix BChemical information

The following provides details about the chemical used:

in each chrysotype formula
to remove calcium carbonate from paper
to regulate humidity in paper
to process prints

More information about these chemicals, including safe handling advice can be found by visiting the Safety Data Sheet databasemsds.com.


Ammonium chlorideChemical formula: NH₄Cl CAS number: 12125-02-9 Also known as: Sal ammoniac, salmiac Hazards: Harmful if swallowed. Eye, respiratory and skin irritant. Ammonium citrateChemical formula: C₆H₁₇N₃O₇CAS number: 3458-72-8 Also known as: Tri-ammonium citrate, ammonium citrate tribasic, citric acid triammonium salt Hazards: Can cause serious eye irritation. Skin and respiratory irritant. Ammonium ...

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