In verity , not much . The master element in both , not surprisingly , is atomic number 11 chloride . In fact , the U.S. government take that any food for thought - grade salt be a lower limit of 97.5 percent pure , so any character of saltiness you consume in the U.S. ( and most develop countries ) is go to be almost exactly the same as any other type of salinity in terms of what it is made up of .
However , “ unconstipated ” or “ table ” Strategic Arms Limitation Talks usually hold an anti - clumping agentive role , like calcium silicate or Na ferrocyanide , andiodine . cosher salt usually does n’t contain either of these things , though occasionally some manufacturer do add up an anti - clumping agentive role . But this is rarified , and even when they do , it ’s usually much less than the measure typically added to table salt .
The most striking deviation between cosher salt and regular salt is the caryopsis size . If you take care at board common salt under a microscope , you ’ll see that it has been mill around so that the salt crystals look like minuscule cube . cosher Strategic Arms Limitation Talks , on the other handwriting , is larger grained and less processed , and has a more random , crystalline anatomical structure .

This size difference of opinion is direct responsible for how Kosher salt got its name . Contrary to what is often thought , Kosher salinity is not call “ Kosher ” because the salt itself is specifically certify as such . Rather , Kosher saltgot its namebecause it was used in the process of koshering meat , specifically to remove surface blood from meat . small grained table salt , like table salt , have a tendency to break up quickly and soak up more into the centre itself . Larger grained Strategic Arms Limitation Talks absorbs the blood and then can be more thoroughly washed off after , removing the airfoil blood without making the meat overly piquant .
Buying any older cosher salt does n’t actually guarantee that it is certified kosher ( although most people - produced , food - grade SALT , of various variety , are certified kosher ) . If you ’re curious about whether or not the salt you have is endorse kosher , just look on the container for a K or a U that is circled . If it ’s there , the salt is kosher , no matter of grain size or added ingredients .