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Items | Standards |
COLOR | a light beige or pale yellow color |
CONTENT | ≥99% |
LOSS ON DRYING | ≤9.0% |
PH | 4.5 - 5.5 |
ARSENIC | ≤0.0003% |
HEAVY METAL(As Pb) | ≤0.001% |
FLUORIN | ≤0.003% |
WATER IN SOLUBLE | ≤0.30% |
FE | ≤0.005% |








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