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RE: Use of HCl

Greetings,Are there any special precautions when storing/using a small amount of 5-10% hydrochloric acid (for testing for carbonates)? Thanks,Kyle

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Re: RE: Use of HCl

The plastic bottle it originally came from is the best container. As for usage, caution is always recommended regardless of concentration. But since you only need a tiny drop to test forcarbonates it's...

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Re: RE: Use of HCl

Kyle, I put a small amount in a tiny eye dropper-type of bottle w/ lid, and put in my car's cupholder. It tarnished the coins in there, to my surprise. Maybe the lid wasn't tightened all the way, I'm...

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Re: RE: Use of HCl

"Maybe the lid wasn't tightened all the way."Almost certainly not. Never keep aggressive chemicals in containers that are not supposed to hold them. The bottles in which acids are shipped have tightly...

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Re: RE: Use of HCl

I've kept a small dropper bottle of HCl in my field vehicle for years without any issues in a bottle specifically designed to handle acids. If you don't have one of these, the vapors will come through...

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Re: RE: Use of HCl

Properly stored, HCL has an infinite shelf life. It is not subject to any form of decomposition or ageing.

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Re: RE: Use of HCl

After having a variety of acid dropper bottles leak and ultimately ruin clothing and leather field cases, the solution (no pun intended) that I found was to 1) use the smallest possible dropper bottle;...

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Re: RE: Use of HCl

Be sure to label the bottle so that nobody tries to use it as eye drops!

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Re: RE: Use of HCl

Plastic is permeable to HCl and that is why things near it will rust. The only way to prevent HCl from getting out is keeping it in a glass bottle with a neoprene stopper or special plastic cap like...

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Re: RE: Use of HCl

Very true Reiner, I had a gallon bottle of 15% stored on a painted metal shelf for a few years. It ate the paint beneath it and nearby, and then started on the metal. I though it had been leaking or...

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Re: RE: Use of HCl

Yes like Reiner said HCl goes through plastic bottles and causes extensive corrosion expecially if concentrated.Incidentally HF (not recommended to have it) not only does the same but also etches glass...

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Re: RE: Use of HCl

Reiner and John have both made false generalizations.Some kinds of common plastic are permeable and/or attacked by HCl. Polyesters are a good example. However not all plastics are permeable and/or...

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Re: RE: Use of HCl

I have a 1 gallon jug of 30% HCL (as it came from the store, never opened) and I keep it in a 5 gallon plastic pail with a lid.After not using it for 2 years (I keep it in my New England garage, can...

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Re: RE: Use of HCl

Muriatic acid (impure HCl or hydrochloric acid) is often sold in the stores in certain plastic containers. They are not always suitable for long-term storage; I expect that they sell the stuff...

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Re: RE: Use of HCl

To solve Calcite or Aragonite, acetic acid (vinegar) is strong enough. Gg

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Re: RE: Use of HCl

I store and use my HCl outside, in all quantities. I've seen it corrode things, inside, unexpectedly, a number of times over the years.David KJ

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Re: RE: Use of HCl

A lot of the corrosion problems from HCl fumes could be avoided or minimized by more dilution of the acid. For testing for calcite/aragonite there is no need for concentrated acid, even 5% will do just...

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Re: RE: Use of HCl

AlfredoI use mine mostly for desolving calcite pockets, so I need it full strength.:-D

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Re: RE: Use of HCl

Wayne, you don't need full strength, you just need p-a-t-i-e-n-c-e :)-D

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Re: RE: Use of HCl

The hint of Alfred is important. Strength acid may result in ugly yellow layers because iron is mostly everywhere. For all who want to do that I recommend the following procedure: Put the specimen in...

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