AREYNOLDS38
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h3po3
Does anyone have a written procedure for sythnthing h3po3 ? There used to be one on drugs and booze, but the site bas been down. The best i can
remember is you use potassium phosphite and boil it in hydrochloric acid then put it in a freezer. Thats all i can remeber. I used to order it from a
big chem supplier but it must bave been put o.The watched list or somthing cause they absoloutly wont sell it to me anymore. It works excellant to
make HI. ANY HELP WOULD BE APPRECIATED.
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woelen
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Look for alternatives. There are more compounds, which are suitable for making HI.
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AREYNOLDS38
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otc
Could someone suggest something thats going to be otc ?
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blogfast25
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'Bone ash', essentially Ca3(PO4)2, plus concentrated H2SO4:
Ca3(PO4)2(s) + 3 H2SO4(l) === > 3 CaSO4(s) + 2 H3PO4(l)
This is 'Ye Olde Way'...
Make your own bone ash by thoughly cleaning chicken bones, drying them and calcining them. Have fun!
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AJKOER
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You can buy TSP (TriSodium Phosphate) at Home Depot. Dissolve TSP in hot water and add Oxalic acid as the Sodium oxalate, Na2C2O4, is not very
soluble and falls out of solution (done it):
2 Na3PO4 + 3 H2C2O4.2H2O --> 3 Na2C2O4 (s) + 2 H3PO4 + 6 H2O
The results here would be mostly be more dilute than Blogfast's suggestion (except possibly by heating the mixed dry Na3PO4 and H2C2O4.2H2O)
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If you are looking for paths to HI, one recent speculation was that heating dry Oxalic acid dihydrate well mixed with dry NaI, in an environment
largely absence air, could generate HI gas. This follows reported observations that a similar reaction with NaCl forms Hydrogen chloride.
The issue is with side reactions, namely the ability of air to decompose Hydrogen iodide into Iodine vapors:
4 HI + O2 --> 2 H2O + 2 I2
but there is another reaction:
I2 + H2C2O4 --> 2 HI + 2 CO2
so Iodine vapors in touch with Oxalic acid (or H2C2O4 vapors) could re-converted the Iodine to Hydrogen iodide. The procedure may also not work for
another reason, the reaction is too energetic. So, if interested in investigating, please perform a scaled down test.
[Edited on 5-3-2013 by AJKOER]
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ScienceSquirrel
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He wants to make phosphorous acid, not phosphoric acid
http://en.wikipedia.org/wiki/Phosphorous_acid
http://en.wikipedia.org/wiki/Phosphoric_acid
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blogfast25
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Oopsie. My bad. 3 is the magic number.
[Edited on 5-3-2013 by blogfast25]
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ScienceSquirrel
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That's OK.
Phosphoric acid is widely available as it is used for yeast washing in brewing, pH down in hydroponic systems, iron descaling, etc.
Mr Reynolds wants phosphorous acid for a spot of meth cooking 
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blogfast25
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Quote: Originally posted by ScienceSquirrel  | That's OK.
Phosphoric acid is widely available as it is used for yeast washing in brewing, pH down in hydroponic systems, iron descaling, etc.
Mr Reynolds wants phosphorous acid for a spot of meth cooking
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What's it do in meth cooking?
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Bot0nist
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I believe it is used for the "in situ" regeneration of HI in a psuedo to meth cooking tek. I know very little to nothing about that chemistry, or
mechanism, i admit though. so I could be wrong.
U.T.F.S.E. and learn the joys of autodidacticism!
Don't judge each day only by the harvest you reap, but also by the seeds you sow.
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Metacelsus
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Is there any way to reduce phosphoric acid to phosphorous acid? (Electrolysis comes to mind.) If so, it might be a good way to get phosphorous acid
given the easy availability of phosphoric acid.
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Doc B
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Will phosphoric acid regenerate HI from I2 spent on deoxygenating the benzyl alcohol, just the same as phosphorous acid?
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Prometheus23
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No, phosphoric acid will not generate hydroiodic acid from elemental iodine, because phosphoric acid is not a reducing agent.
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