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C. with fuming sulphuric acid (containing about 40-50% SO3), and by this treatment is converted into anthraquinone-b-monosulphonic acid.
2
In natural DS preparations and their fractions, this activity (as well as the antithrombotic activity in an animal model) appears to require IdoA2SO3-containing sequences.
1
It is therefore analogous to sulphurtrioxide which forms sulphuric acid in a similar way:
2
Sulphuric acid converts it into ethyl sulphuric acid (see ETHER, and sulphurtrioxide gives carbyl sulphate.
3
It is not decomposed at a red heat but suffers loss, probably of sulphurtrioxide, at a temperature above 900°C.]
4
Reactions involving sulphur dioxide, sulphurtrioxide, and sulphuric acid can channel energy reasonably efficiently: Earth's use of free oxygen is only twice as effective.
1
Sulphur is objectionable in acetylene because it is converted into sulphurous and sulphuricanhydrides, or their respective acids, as it passes through the flame.