1kg Copper Sulphate★Pentahydrate★high purity★Make sure to checkout with minerals-water to get what's on the picture★

Worked well for copper electrolysis, if you are planning to use it for this purpose use 200g-300g per liter of water with an appropriate electrolyte (sulfuric acid, white vinegar or salt)

As described

good product

Good

I used this to kill some unwanted growth in a hedge to do this I drilled 13mm holes around them at 45 degrees as deep as you can and fill just when the leaves start to fall and again when the holes are dry and it works a treat

Very good product, I mainly use it to create crystals out of it. Have not found any impurities and the packaging is nice and sturdy. Buying this again.

Can’t comment until next year then I can tell you if it has worked or not

The first problem with this product is that it is NOT High purity as it claims.When I dissolved 103g (I will explain why I used 103g later) into 1litre of water, There was a dark precipitate that formed on the bottom.This looked like metal oxide residue. Once decanted & filtered the precipitate was dried. This weighed 3.579gTherefore, not even accounting for any remaining dissolved impurities. The product is already less than 96.5% purityThe other issue is that the crystals are over saturated. When I drove the excess water from 100g of these crystals, they weighed just under 97gSo, there is 3% excess water. Hence why I used 103g in the above calc.So this appears to be a low grade commercial product which is fine for algae removal or tree stump rotting etc.But absolutely no good for crystal growing, scientific work or for any water treatment etc..