Less than 3.6% [Metal Species] 
Magnesium and Alkali Salts
A s s a y C a O
M a g n e s i u m a n d A l k a l i S a l t s
F l u o r i d e
L e a d
A r s e n i c
A c i d I n s o l u b l e S u b s t a n c e s
H e a v y M e t a l s