There isn't. This is a myth that has been passed on by drug addicts that have been trying various methods to get the various ingredients needed to produce methamphetamine, or crystal meth.
Zero. There are no salt blocks available on the market that have ephedrine in them.
None. No such salt block, medicated block nor loose mineral mix exists.
There really is no such salt block or mineral mix. You can check with your veterinarian or those companies that make livestock salt blocks but it's highly likely you will not find such an ingredient in salt licks for cattle.
Nowhere because no such salt or mineral block exists.
You cannot because you are looking for something that doesn't exist.
They are not and never have been. Ephedrine is not found in medicated salt blocks.
Zero. There are no salt blocks available on the market that have ephedrine in them.
No because such salt blocks do not exist.
There are no salt or mineral nor medicated mineral blocks that contain any form of ephedrine in them. Sick animals are treated by antibiotics via injection, not by just giving them a "medicated" salt block.
Nowhere. These type of blocks do not exist.
None. No such salt block, medicated block nor loose mineral mix exists.
No such ingredient is found in salt blocks for cattle. It is merely a myth or rumor that has been passed along from one drug addict to another in their attempt to gain different ingredients to make methamphetamine.
There is no Pseudo ephedrine in horse or cattle blocks.
There really is no such salt block or mineral mix. You can check with your veterinarian or those companies that make livestock salt blocks but it's highly likely you will not find such an ingredient in salt licks for cattle.
Ephedrine sulfate will act as a weak acid in solution because yes it is the salt of a weak base (ephedrine) and a strong acid (sulfuric acid)
None. No salt licks, mineral blocks, medicated feed or any of that sort have ephedrine in them. This is a myth that has been tested and busted by various scientists that have tried to extract ephedrine from various animal-feed and chicken litter sources. Please see the related question below for more info.
No because there's no such thing as a "salt bloke."