Real nasty stuff. I bought a pound of it in the 50,s. I used it to cure birds,and animal skins I would mount. After a while I,d feel sick each time I used it. I was killing my self slowly without even knowing it. I still have it around [somewhere.] It is very hard to get rid of. It won't dezolve. I was afraid to even put it in the garbage. It is a slow killer. Mike.