Quote Originally Posted by KrayZ33 View Post
the kyuubi's chakra burns away naruto's skin and everything else it touches
during the fight against Oro he used his fire-lazer too, so its nothing new
Sakura described coming in contact with the Kyuubi as it's chakra being poisonous, rather than burning.

In the Oro fight, the beam specifically doesn't burn/melt anything though, it cuts/explodes, which is what raw chakra does.