Thank you for your message.
I think if you search that site or similar sites , you can find if %99 purity is 4 dollars per kilogram %99.9 purity goes from 10 dollars per
kilogram . These are from the samples of great inventories of these factories and dealers.
If you have exact details in your mind , post there a buying thread with purities per chemical , and you will be amazed how many people turns back to you.
Thank you for your message. I dont have a concern these chemicals have more hazard effect than ebay uranium when anyone could buy from . My friend had been wanted to buy very big inflatable child toys from there and rumours of hazard control stopped him. Result , the competitor just won. If they package as photographic chemical , there would be small effect.