Cryolite

Cryolite
chemical formula: Na₃AlF₆
( fine powder )
Cryolite is a naturally occurring material, also known as Sodium Aluminum Fluoride. It is used in the production of Aluminum metal. In the field of pyrotechnics, Cryolite will impart a yellow color to flames due to its Sodium content.

MSDS ( Material Safety Data Sheet )

Shipping Restriction (info)	USA Only
Hazmat Fee (info)	No
Signature Required (info)	No
Quantity Restriction (info)	No