hey...i have it. i wonder if that's why i've hated all the cheese i've made. err...i threw out my jack cheese because it tasted so bad, and it was only after I added the carrageenan that this happened.
They have really good customer service though, so I'd definitely contact them. Maybe I should, too.
I didn't have any thickening issues though. maybe i'll try a cheese with agar and see what happens.
I hope I solved your cheese woes! I contacted amazon and they're refunding the full amount, which is awesome. I'm still sad to be out an entire batch of cheese (and it was so freaking amazing prior to the gritty carrageenan) but very happy to have the refund.
The Iota carrageenan I have is from molecularrecipes.com (via amazon) and works really well and is taste and smell neutral. I'm going to order the Kappa from them as soon as they get it in stock.