Silver nitrate shelf life

[Hudo]

How long does silver nitrate and sodium thiosulfate last in its raw form I got a package of each about 12 months ago but theve never been opened would they be sweet still

 

[Sedge]

Probably ok to use ,,
the nitrate goes off colour ( greyish) once it starts to deteriorate

 

[RidingOnwards]

Just checked mine
Aus Chem Supply
No use by dates on packaging.

 

[R3za92]

Just checked mine
Aus Chem Supply
No use by dates on packaging.

No use by date doesn’t mean it doesn’t degrade. In the case of the silver nitrate it oxidises (as sedge said it goes grey) from exposure to moisture or heat (it oxidises at room temp but no problem). Keep it stored with a desiccant in the fridge for the longest shelf life

 

[Sedge]

No use by date doesn’t mean it doesn’t degrade. In the case of the silver nitrate it oxidises (as sedge said it goes grey) from exposure to moisture or heat (it oxidises at room temp but no problem). Keep it stored with a desiccant in the fridge for the longest shelf life

And light will ruin it ,,keep lid on strait after use,
after spraying plants put plants in the dark till dry.

 

[RidingOnwards]

No use by date doesn’t mean it doesn’t degrade. In the case of the silver nitrate it oxidises (as sedge said it goes grey) from exposure to moisture or heat (it oxidises at room temp but no problem). Keep it stored with a desiccant in the fridge for the longest shelf life

Yeah I know that, I was just saying that it had no actual date specified on the package.
Mine is kept in fridge.

 

[R3za92]

Yeah I know that, I was just saying that it had no actual date specified on the package.
Mine is kept in fridge.

Yeah aus chem supply are pretty dogshit at putting batch dates etc on their items so doesn’t surprise me.

 

[Hudo]

Yeah aus chem supply are pretty dogshit at putting batch dates etc on their items so doesn’t surprise me.

That's were mine came from

 

[Old fox]

I got mine from a photography supplier. It still works fine, nearly 2 years from purchase , just stored at room temperature ( i.e. not in fridge).

 

[RidingOnwards]

I got mine from a photography supplier. It still works fine, nearly 2 years from purchase , just stored at room temperature ( i.e. not in fridge).

Do you reckon it’s better stored at room temp?
I’m sure I read somewhere to keep it in a cool dark place

 

[Old fox]

Do you reckon it’s better stored at room temp?
I’m sure I read somewhere to keep it in a cool dark place

Just commenting that my batch lasted that long at room temperature. I guess if I bought a lot, ( which I didn't) I'd be inclined to preserve its shelf life by storing it in the fridge. A constant temperature provided by a fridge has to be better for long term storage than room temp fluctuations, particularly summer heat.