Cryolite

$7.69 /lb
(sodium fluoaluminate) [Na3AlF6] White powder.

Cryolite is a common yellow coloring agent in fireworks.

Although they are not interchangeable with cryolite, other yellow coloring agents are the oxidizer sodium nitrate as well as sodium oxalate, sodium bicarbonate and sodium benzoate.

Lancaster Yellow - Pumped Stars:
Potassium chlorate 70%
Cryolite 15%
Red gum 10%
Charcoal, 150 Mesh 1%
Dextrin 4%

Add 25% alcohol / 75% water

Part #CH8103