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Silver Nitrate.... Spots Off ?

Discussion in 'General Issues and Discussion Forum' started by trudi powell, Jan 17, 2007.

  1. trudi powell

    trudi powell Active Member

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    Very rarely will I use Silver Nitrate solution, but I keep it tucked away and supposively out of harms way. But....today some of the crystals that had formed around the lid must have fallen off onto the 'worn once' new shirt when I was cleaning. :mad: Yes...you know what happens....the tiny black spots on your shirt.

    I could just throw the shirt into the back of the closest, but has anyone ever bothered to try and get the Spots Off ??
    Or maybe I just shouldn't clean !

  2. Cameron

    Cameron Well-Known Member


    From memory I think you use weak solution of iodine (2.5%) on the skin and it needs to be done immediately. Once the solution reacts to light and the black spots appear, then there is no resolution.


  3. I've never been able to get silver nitrate off skin much less clothes! I can tell you that ferric chloride comes out if you use the stain devil designed for rust (which kinda makes sense) but that does'nt really help does it. You could sprinkle the silver nitrate on the rest of the shirt and pretend its a pattern. Otherwise you're stuffed. Sorry. Buy another shirt.

    Silver nitrate sticks----£4.95
    Shirt from primark----£6.00
    Not getting one onto the other,---- priceless.

    There are some things money can't buy. For everything else theres mastercard. ;)

  4. Nikki

    Nikki Active Member

    The black stain is caused by the oxidation of the silver. (but we know that anyway). You can dissolve the stain in Sodium Thiosulfate. This chemical is used in the developing process and can be obtained from photographic suppliers. It may damage the material but if you are going to dispose of it anyway it might just be worth a try.

    I don't know much more than that. Amazing what seemingly useless pieces of information lodge in your brain only to be recalled years later!

    Hope this helps

  5. Cameron

    Cameron Well-Known Member


    Moons ago when I was a junior in a private practice I was instructed to tidy the medicine cabinet. In those days there was no such thing as 'shelf life ,' nor a question of discarding out of date drugs. They just accumulated. Many were kept in glass jars which through time had their lids jammed with the fomation of chrystals. I hope this does not sound familiar to anyone.

    In any event I was curious to see what was kept in the jars with no labels and managed to prize the stopper from one container only to spill the contents over my hands. It was silver nitrate solution and for the next fortnight my hands were pitch black, literally.

    When I went to the local hostalry and was asked what happened, I told them I was miner and had just showered but forgot to wash my hands.

    The lesson was learned , take care of the pair. :)

  6. Anne McLean

    Anne McLean Active Member

    Hi Trudy

    If you find the answer perhaps you’d let us all know. Like Robert, I have never successfully managed to salvage any clothing which has been attacked by AGNO3. As Cameron has said, you can immediately (but it must be instantly) cover the area with:

    1. 10% solution of Iodine which causes another stain on the clothing. This can then be removed using 5% solution of Potassium Hydroxide.
    2. Potassium Ferricyanide in water (also used in photography)
    3. Copper Sulphate or Chloride in water.

    Recent stains on the skin may be removed by the application of Potassium Iodine to the moistened stain and leaving for a few hours. Personally, I find that rubbing ordinary household salt in whilst washing my hands can be the answer and, I often use this after treating a lesion with AGNO3, just in case any has got on to my skin.

    For older stains on skin, a pumice stone and ordinary toilet soap is readily available and does the job, although you need to be careful not to rub too hard, as it can leave the area feeling tender for a short time afterwards.

    A scouring pad and Flash with bleach, is good for removing it from flooring and hard surfaces.



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