The Vespiary

The Hive => Chemistry Discourse => Topic started by: gee on April 05, 2002, 12:25:00 AM

Title: hydro-phosphoric acid
Post by: gee on April 05, 2002, 12:25:00 AM

I must put this question to rest, in my mind. To me, Hydo-phosphoric acid(easy to obtain), just needs to be boiled a bit to release the hydrogen bond, therefore making it adequate for making chili.......

Title: H2PO2
Post by: Rhodium on April 05, 2002, 12:34:00 AM

That makes no sense at all.

Are you talking about hypophosphorous acid (H2PO2), and what are you suggesting to do with it?

Title: farm chems
Post by: gee on April 05, 2002, 01:21:00 AM

Title: hydro-phosphoric ????
Post by: Elementary on April 05, 2002, 03:40:00 AM

Phosphoric acid comes in these forms :

Meta-, Pyro- and Ortho-

Other acids :

Phosphorous Acid : H3PO3
Hypo-phosphorus Acid : H3PO2

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Leonard Cohen cheers me up !

Title: Do you mean HP?
Post by: El_Zorro on April 07, 2002, 08:11:00 AM

Title: No such thing !
Post by: Elementary on April 07, 2002, 08:19:00 PM

Hydrophosphoric acid and hyrophosphoric acid don't exist.

The acid used in ephedrine reductions is HYPO-PHOSPHOROUS ACID.

GET IT  :P

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Leonard Cohen cheers me up !

Title: formula?
Post by: El_Zorro on April 07, 2002, 11:22:00 PM

Title: Merck Index - hypophosphorous acid
Post by: terbium on April 07, 2002, 11:36:00 PM

This is the stuff that can be used for cooking meth - hypophosphorous acid.

 Monograph number: 4916
  Title: Hypophosphorous Acid. 
  CAS Registry number: [6303-21-5]
  Molecular formula: H3O2P
  Molecular weight: 66.00
  Composition: H 4.58%, O 48.49%, P 46.93%. 
  Literature references: Conveniently prepd by treating NaH2PO2 with an ion-exchange resin:  Klement, Z. Anorg. Allgem. Chem. 260, 267 (1949).  Review:  Ohashi, "Lower Oxo Acids of Phosphorus and Their Salts" in Topics in Phosphorus Chemistry, Vol. 1, M. Grayson, E. J. Griffith, Eds. (Interscience, New York, 1964) pp 113-187.
  Properties: The water-free acid forms deliquesc crystals; supercools to a colorless, odorless, oily liquid.  d 1.493.  mp 26.5 deg.  Dec by heat into H3PO4 and spontaneously flammable PH3.  Miscible with water, alcohol, ether.  Oxidized by hot H2SO4; SO2 and S formed.  It is a powerful reducing agent.  Marketed in aq solns
of various concns, e.g., 50%, d 1.274; 30-32%, d 1.13; 10%, d 1.04.  K1 = 8 x 10-2. 
  Melting point: 26.5
  Density: 1.493; 1.274; 30-32; 1.13; 10; 1.04

Title: Hypophosphoric acid is useless.
Post by: terbium on April 07, 2002, 11:43:00 PM

This is the Merck Index entry for hypophosphoric acid which is useless for cooking meth.

  Monograph number: 4915
  Title: Hypophosphoric Acid. 
  CAS Registry number: [7803-60-3]
  Molecular formula: H4O6P2
  Molecular weight: 161.98
  Composition: H 2.49%, O 59.27%, P 38.24%. 
  Literature references: Prepn from its salts:  Salzer, Ann. 187, 322 (1877); 211, 1 (1882).  Review:  Ohashi, "Lower Oxo Acids of Phosphorus and Their Salts" in Topics in Phosphorus Chemistry, Vol. 1, M. Grayson, E. J. Griffith, Eds. (Interscience, New York, 1964) pp 113-187.
  Properties: Orthorhombic plates, mp 70 deg (easily forms a dihydrate, mp 55 deg), usually available only in aq soln.  The aq acid is colorless and odorless; dec on concn at atm pressure.  Readily forms crystallizable normal and acid sodium salts.
  Melting point: 70; 55

  USE:  Acid sodium salts in baking powders.