Method for preparing 5,5'-bi-1H-tetrazole salt

Details Method for preparing 5,5'-bi-1H-tetrazole salt Method for preparing 5,5'-bi-1H-tetrazole salt

1999-08-16

2000-03-21

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D25704, C07D40304

Patent

active

060404531

ABSTRACT:
A process for the preparation of a 5,5'-bi-1H-tetrazole diammonium salt by using dicyan, sodium azide, ammonium chloride and water as a reaction medium. This process is industrially advantageous since the 5,5'-bi-1H-tetrazole diammonium salt is synthesized and, then, the precipitated crystals thereof are simply isolated by filtration to obtain the 5,5'-bi-1H-tetrazole diammonium salt maintaining an yield which is not lower than 90%. The 5,5'-bi-1H-tetrazole diammonium salt is a gas-generating agent for air bags, which is lowly toxic and is easy to handle.

REFERENCES:
patent: 2710297 (1955-06-01), Friederich

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