I was wondering, is it safe to post Ammonia?
yes its safe to post(really tape the lid down, and triple bag it).
I refuse to go on a wild goose chase(petrol isn't cheap these days), looking for this ammonia, and i bought mine online, and they sent it to me - safely, well sealed, so that the poor postie doesn't get a shock.There was a tiny trickle inside the jiffy bag, but not enough, to wet the envelope. care opening the envelope though. That stuff makes my eyes water & my sinuses explode.
I recall, it was £2 ish postage for a 500ml bottle.