Re: Technical Grade Muriatic Acid

Agreed, Richard.
I have in my possession sulfuric, phosphoric, and nitric acid (aside from
glacial acetic). I have been cleaning out my chems and my darkroom this
weekend in order to set it up, and I am a bit leery of these three...I am
thinking of disposing of them at the chemistry lab at the college, because
in all that I do alt process, I have not needed them as I thought I might.
They were called for in some old mordancage formulae, or dye mordanting,
too...although I notice that they are used sometimes in pt/pd or
something???

Do any of you keep this stuff on hand and, if so, for what process? I am
not making aqua regia...

The only one in plastic is phosphoric, otherwise both in glass. I got them
from Tri Ess which is now defunct, so I hate to dispose of them if I may
need them for some distant future process.
Chris
----- Original Message -----
From: "Richard Knoppow" <dickburk@ix.netcom.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Sunday, October 09, 2005 7:17 PM
Subject: Re: Technical Grade Muriatic Acid

>
> ----- Original Message -----
> From: "Judy Seigel" <jseigel@panix.com>
> To: <alt-photo-process-l@sask.usask.ca>
> Sent: Sunday, October 09, 2005 9:22 AM
> Subject: Re: Technical Grade Muriatic Acid
>
>
>>
>> For the record -- a couple of points: My reagent grade Hydrochloric
>> acid, bought AT LEAST 15 years ago from Tri-Ess, was 37% (noted in the
>> catalog & once upon a time on the label) and as I observed previously did
>> not perform any better, in fact in some cases not as well, as muriatic.
>
> Snipping...
> Perhaps Ryuji will provide some education here on how to store hazardous
> materials. I had a frustrating time just now trying to find what
> materials were and were not compatible with strong acids for storage using
> an internet search. Some strong acids and alkalis will dissolve glass
> (sodium hydroxide is notorious for this as is hydroflouric acid) and
> should either not be stored in glass or the container should be replaced
> periodically.
> Some strong acids and alkalies generate a lot of heat when dissolving,
> Sulfuric acid and Sodium or Potassium Hydroxide are not the only materials
> to do this. Beside splattering there can be enough heat to break some
> types of containers.
> I am no scare merchant but I do think there are materials which are
> dangerous enough so that one should not work with them without a thorough
> education in chemical safety.
>
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@ix.netcom.com
>
Received on Sun Oct 9 21:35:47 2005