To break one nitrogen atom away from another requires breaking all three of these chemical bonds.
In the red form, all three nitrogen atoms carry a positive charge.
However the chain of nitrogen atoms may also be branched at one or more points.
One nitrogen atom per 100,000 carbon atoms will produce yellow color.
Chemicals with lots of nitrogen atoms in them tend to be explosive.
The extra pressure was needed because chemical bonds between nitrogen atoms are difficult to break.
They usually contain nitrogen atoms, which can easily be protonated.
The steric environments of the two nitrogen atoms are very different.
The nitrogen atom has only 6 electrons assigned to it.
That fact points the way to an approach to make the yellow color go away: by forcing nitrogen atoms to combine.