INDEX/GRADE

SH-90

SH-88

SH-85

CONTENT

90%

88%

85%

Na ₂ S ₂ O ₄

≥90%

≥88%

≥85%

Fe

≤20ppm

≤20ppm

≤20ppm

Zinc (Zn)

≤1ppm

≤1ppm

≤1ppm

Other heavy metal

（calculated as Pb）

≤1ppm

≤1ppm

≤1ppm

Water Insolubles

≤0.05%

≤0.05%

≤0.05%

Shelf Life(month)

12 <

SodiumHydrosulfite90% Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte

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