Hi shaxpere,
That’s because their latex and their mattress isn’t certified organic. They do have a Greenguard certification that tests their mattresses for harmful VOC’s so I would consider their mattresses to be “safe enough” but it’s also true that all of the latex you are likely to encounter (either Dunlop or Talalay that is made with either natural or synthetic rubber or a blend of both) will have a reliable safety certification such as Oeko-Tex, Eco-Institut, or Greenguard Gold and based on actual testing I would consider any type or blend of latex to be a very “safe” material in terms of harmful substances and VOC’s.
There is also more information about the different levels of organic certifications in post #2 here and some of the benefits of an organic certification in post #3 here and there is more about the different types of organic and safety certifications in post #2 here and more about some of the differences between organic and safety certifications in post #2 here that can help you decide whether an organic certification is important to you or whether a “safety” certification is enough.
All latex foam (including 100% natural Dunlop and Talalay and organic latex) uses a small amount of chemicals to manufacture the latex (see post #18 here) but the manufacturers don’t release the specifics of their compounding formula which is a closely guarded secret.
While I’m not a chemical engineer so I can’t speak to all the differences in their chemical formulations … the two main “chemical” differences between Talalay and Dunlop is that Talalay latex uses carbon dioxide gas as a gelling agent while Dunlop latex uses sodium fluorosilicate. Natural Dunlop latex is also often manufactured closer to the latex plantations so in many cases it needs less ammonia or other stabilizing agents to stabilize the latex and prevent it from coagulating or putrefying before it’s used while Talalay is made in Holland (Radium) or in the USA (Talalay Global) so the liquid field latex they use may contain higher levels of ammonia or other chemicals to stabilize it before it’s used to manufacture the latex. Most of the ammonia is removed during the foaming process either way.
You can also see some comments about the chemicals that they have listed in post #60 here.
It would be great to attach a picture of your law tag to your post. You can also see some comments about their law tags (and a picture of a law tag for the Opus mattress) in posts #21 - #25 here. Their law tags are ambiguous because even if you give them the benefit of the doubt the natural latex in their mattresses is a different material from what they are calling “natural latex memory foam” and they should probably be listed as separate ingredients. The first two words may also be referring to the latex and the last two words may be referring to the memory foam so it’s possible that they are written to only “look like” a single ingredient when in fact they aren’t.
Phoenix