Well, i wouldnt huff it, but for a reaction it would be alright i think. Every one i saw had a lid and hose on the test tube or a hose taped to a test tub3 that ran to a vokumetric flask or something, full of water and the gas bubbled through it, perhaps to cl3an it a bit. If you get it hottr than 300c, itll put off nitriis oxide which is poisonous and doesnt act ike nitrous. Thats whay i read