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Items:

Requirements:

Result:

Purity

99.5%-101.0%

99.7%

Melting range ℃

167-172.0℃

168.1-169.5℃

Insolubles

≤0.03%

0.006%

Heavy metals

≤5ppm

2.5ppm

Loss on drying

≤0.5%

0.31%

Ph Value

10.0-11.5

 11.2

Fe

    ≤1ppm

 0.61ppm

SO?2+

≤10ppm

6.8ppm

Cl-

    ≤3ppm

1.8ppm