pyrotechnics-revived/chapters/99-1-chemical-copper-chromi...

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## Copper chromite
**Formula**
$CuCr2O4$
**Synonyms**
TBD
**Description**
Copper chromite is employed as a catalyst is certain rocket propellants. It is typically added in 1 to 5% quantities to whistle or composite rocket fuels which increases the burn rate. A range of other catalysts exist which can often be substituted for copper chromite. Examples are Iron oxide (red) and Manganese dioxide.
**Sources**
Copper chromite is very hard to make or obtain other than from dedicated pyro chemicals suppliers.
**Hazards**
Copper chromite is poisonous and should be handled wearing a dust mask.