Does Ferric Ammonium Citrate go bad?

Discussion in 'B&W: Film, Paper, Chemistry' started by athanasius80, Jul 24, 2008.

  1. athanasius80

    athanasius80 Member

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    I bought my bottle of Ferric Ammonium Citrate about a year ago and have always stored it in the original container in an open cupboard away from direct sunlight. Would it go bad in storage after several months?

    Thanks,
    Chris
     
  2. Ian Grant

    Ian Grant Subscriber

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    It can decompose over time but it should easily last a year or two stored properly, so yours should be fine.

    Ian
     
  3. bowzart

    bowzart Member

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    Be sure that the lid is on tight. If it hasn't been opened and it is well sealed it should last a long time. However, if moisture can get to it (and it doesn't take much of a leak for that to happen) it can set up solid like a green brick and if it does, it's not likely going to be of much use. I've seen this happen more than once.
     
  4. Jim Noel

    Jim Noel Member

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    I always take mine out of the plastic container and but it in brown glass. It lasts for years in such conditions.
     
  5. bowzart

    bowzart Member

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    I think it could be somewhat dependent upon where you are. I live on the wet side of the mountains in the Pacific NW of the US. It can get pretty damp. Any precaution to keep it dry couldn't hurt.
     
  6. dancqu

    dancqu Member

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    Keep it wet? Dan
     
  7. bowzart

    bowzart Member

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    Well, you'd know!

    I guess I could conceivably be misunderstood, with my messed up antecedents. You'd want to keep the F-A-C dry, which is critically important if you live in a damp kind of place like the Willamette Valley!
     
  8. dancqu

    dancqu Member

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    Know better now. Checked via Google.
    There is a green and a brown version. Both are
    VERY soluble. A 60% solution is mentioned and
    even greater concentration likely possible.

    The solution should be kept in a dark space as
    light will reduce the the ferri to ferro. Dan
     
  9. bowzart

    bowzart Member

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    I've never bought it in solution; that is an interesting idea, but it seems to me that stuff might grow in it. You know. Urschleim. I've always bought it dry. Most formulae call for the green, but I've seen I think one for the brown.