I don't know if it's the same stuff, but Hot Tubs use it in powder, or in tablet, form as a disinfectant, I would have thought an owner of such would be prepared to donate you some.

Don

Exactly.
Silver bromide on ebay is quite breathtakingly expensive. As a pure aside we used to use Potassium bromide powder (cheap) weighed out for solution as an anticonvulsent in dogs before the tablets became available.

pgk

Edited By pgk pgk on 06/02/2020 14:59:01

Fisher Scientific certainly sell it, but where the quantities are small enough for your needs is a different matter

The brand name might give you something to search on.

It used to be much easier when we could just pop down to Prestons on West St.

Bill

Edited By peak4 on 06/02/2020 16:36:55

Photo chemicals

These people (link above) were used by a former colleague who dabbled in old photo processes a long time ago now, might be worth checking out.

Edited By V8Eng on 06/02/2020 16:52:41

Edited By V8Eng on 06/02/2020 16:54:30

Used to make it myself when I was 13 years old (read: looong ago…). Cant remember the method, but most probably the one using KBr, MnO2 and sulphuric acid. See Wikipedia.

Kind regards,
Hans

(still around, no self poisoning…)

Your plate, even with the dual sensitisation will be incredibly slow and developing with mercury is definitely a no-no!

Have you considered the Bequerel process??

Bequerel Process

The flasks should probably be ground glass stoppered rather than rubber or cork.

Potassium Bromide and Manganese Dioxide are both readily available. Strong Sulphuric Acid is controlled, but 40% is roughly the strength used in Car Batteries.

Note warnings in other posts about toxicity and my photo instructions mention of a Fume Cupboard. Nasty stuff – under no circumstances get any in your lungs or eyes.

Dave

I agree entirely with Alan – likewise, I have worked with it a long time ago. One would not contemplate working with these free Group seven elements – Fluorine, Chlorine or Bromine – any more than the lower Group one elements – Caesium, Potassium or Sodium – without taking careful precautions during their manipulation.

These Group seven elements are even more potentially dangerous than the metals, because of their physical form. Being a volatile liquid, the risks with Bromine are obviously slightly different to the gases but the liquid contact can create a particularly nasty outcome for the user. Inhalation is a definite no-no, just like the gases.

Doubtless there are warnings on the internet. These need to be heeded!

Are you perhaps referring to the WW1 myth concerning the use of the anaphrodisiac potassium bromide as an additive to soldier's tea to prevent "lustful behaviour"? If so most on here, including me, are probably past the age of worrying about that sort of thing

John