Invented in 9th-century China, this substance is the earliest known explosive

Answer of Word Craze Invented in 9th century China this substance is the earliest known explosive

This is a tricky question of Word Craze which last appeared on Level 531. Meanings or answers can change from time to time with each game update if you noticed a change on the answer of this clue please do let us know by commenting below so we can fix it A.S.A.P.
The solution below is:

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