You may see the statement "This product contains cadmium" on both A and B tubes. Don't let this fool you! Regular cadmium paint tubes require this warning sentence (US only). We can assure you that one of these tubes is definitely cad-free.
The Liquitex Team
There's a little pamphlet in the box which explains what they're doing: For two colors, they are providing one tube each of their regular cadmium-pigmented acrylic and their new formula which does not use cadmium. If you read that first, then it makes sense and is perfectly un-alarming: They are challenging artists to compare them and try to guess which one is which.
Separately, however, they also added in a little card with the above text on it--to reassure me, I suppose--and if you read that first it looks instead like they just have no idea what they did with their cadmium and it comes off kind of scary if you haven't dug deep enough to find the pamphlet yet. A friend remarked that, really, they should have just put the contents of that card at the end of the pamphlet.