Sodium metabisulphite (a.k.a sodium pentoxide, a.k.a. sodium pyrosulphite) converts to sodium bisulphite in water:
Na2 S2 O5 + H2 O = 2NaHSO3 = sodium salt of sulphurous acid
This will oxidize in moist air to NaHSO4 = sodium hydrogen sulphate or sodium bisulphate = what the chemical supplier sold me instead of sodium bisulphite, either due to my own or their negligence.
Sodium hydrogen sulphate is also available in my supermarket as a pool chemical (acidifier or something) but is not much use to bees afaik.
If you're having trouble sourcing sodium metabisulphite/sodium bisulphite you can perhaps try a homebrewery where it is sold as a sterilizing agent. Brewing beer is also a fun hobby as well as legal drug synthesis.
re: reduction of pfed with sodium sulfite, iodine and dh2o?
Fri Sep 30, 2005 3:09 pm
apparently sodium bisulphate (sodium hydrogensulphate) is sometimes sold interchangeably with sodium metabisulphite for sterilising brewing equipment... so be careful of that when buying it.
Sodium metabisulphite (a.k.a sodium pentoxide, a.k.a. sodium pyrosulphite) converts to sodium bisulphite in water:
Na2 S2 O5 + H2 O = 2NaHSO3 = sodium salt of sulphurous acid
This will oxidize in moist air to NaHSO4 = sodium hydrogen sulphate or sodium bisulphate = what the chemical supplier sold me instead of sodium bisulphite, either due to my own or their negligence.
Sodium hydrogen sulphate is also available in my supermarket as a pool chemical (acidifier or something) but is not much use to bees afaik.
If you're having trouble sourcing sodium metabisulphite/sodium bisulphite you can perhaps try a homebrewery where it is sold as a sterilizing agent. Brewing beer is also a fun hobby as well as legal drug synthesis.
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