Is 1000ml of 'hot-ice' solution dangerous?

So I was trying out the sodium acetate trihydrate 'hot ice' experiment, and my 300ml test worked great. So, naturally, more is better right? (cringe)

Now I have a 1000ml in a pyrex beaker cooling down, and I am belatedly wondering if this is going to generate too much heat when I set it off. I'd imagine the beaker itself is safe, I don't imagine it would do anything to the granite countertop, but it is resting on a plastic cutting board, which could conceivably melt.

How much of this can I make before I'm doing something risky?

• I bet it was fun to watch - to much fun to think in measuring the temperature change ;) Small volumes (<< 300 mL) are actually used as pocket warmers and usually considered to be safe. I'd say the 1000 mL experiment is safe too, but you might want to skip the cutting board and place the beaker in a larger glass bowl ("Kristallisierschale"). In the end, it's your granite table, not mine. – Klaus-Dieter Warzecha Dec 27 '14 at 11:08
• According to About Chemistry: it states The heat generated by the crystallization of a refrigerated sodium acetate solution should not present a burn hazard. I hope nobody would pour it on their skin to test the validity of the statement. chemistry.about.com/od/homeexperiments/a/… – LDC3 Dec 27 '14 at 14:33