It is distinguished from meconia by its aqueous solution showing an alkaline reaction with test-paper.
When pure, both the salt and its solutions are neutral to test-paper, and are wholly volatilised by heat.
The resulting solution and jelly are also odourless, neutral to test-paper, free from unpleasant taste, and perfectly transparent.
The fluid is usually tasteless and without smell, and in reaction it is neutral to test-paper.
It is neutral to test-paper, does not affect lime water, and is only slightly absorbed by pure water.
Pure ether should, however, be neutral to test-paper, although seldom so.
At the end of this time examine the test-paper to see if it has partly or altogether changed color.
The presence of ozone is shown by the test-paper acquiring a purple tint when momentarily immersed in water.
He dipped his test-paper into the vessel connected with the positive pole, and the water was still decidedly acid.