Name of product: Sodium hydrosulfite (rongalite)
Molecular Formula: Na2S2O4
Quality standard: HG2074-91 JISK1476-1995
Exterior /Appearance: White free flowing crystal powder.
Smell: Flavourless or smell of sulfur dioxide
Usage: It can be used in the pulp industry, printing and dyeing industry, spinning and weaving industry, and so on.
Packing: inner line PE/nylon/PE three-layer composite plastic bag, outside bag is composite plastic weaving bag, net weight 25KG.or up to customer's requirement
HS Code: 28311000
Specifications:
|
Guidelines
|
90%
|
88%
|
85%
|
|
Na2S2O4
|
≥90%
|
≥88%
|
≥85%
|
|
Fe
|
≤20ppm
|
≤20ppm
|
≤20ppm
|
|
Zinc(Zn)
|
≤1ppm
|
≤1ppm
|
≤1ppm
|
|
Other heavy metal
(With Pb to calculate)
|
≤1ppm
|
≤1ppm
|
≤1ppm
|
|
water insolubles
|
≤0.05%
|
≤0.05%
|
≤0.05%
|
|
Storage time limit(month)
|
12
|
12
|
12
|
