Vat Dye Sodium Hydrosulfite for Bleaching Silk/Wool and Nylon

• CAS No.: 7775-14-6
• Formula: Na2o4s2
• EINECS: 231-890-0
• Certification: CCIC, CIQ, RoHS, ISO
• Purity: 85% 88% 90%
• Type: Sodium Sulfate
• Model NO.: Sodium Hydrosulfite
• Appearance: Crystal Powder
• Grade Standard: Industrial Grade
• Product Name: Sodium Hydrosulfite
• Other Name: Sodium Hydrosulphite
• Name: Shs
• Shs Purity: 85% 88% 90%
• Shs Appearance: White Sandy Crystalline or Yellowish Powder
• Application: Textile or Leather
• Shs Grade: Industry Grade
• Shs Formula: Na2s2o4
• Loading Quantity: 21mt/20′container
• Iron (Fe): 20ppm Max
• Zinc (Zn): 1ppm Max
• Solution Appearance: Clear
• Other Heavy Metal( as Pb): 1ppm Max
• Water Insolubles: 0.05% Max
• Cadmium (CD): None
• Transport Package: Drum
• Specification: 50kg net
• Trademark: Kelai
• Origin: Henan
• HS Code: 2831101000
• Production Capacity: 100000mt

Product Description

Vat Dye Sodium Hydrosulfite For Bleaching Silk/Wool And Nylon

The powder is a white sand crystal or light yellow powder. The infusible powder is insoluble in ethanol, soluble in sodium hydroxide solution, reacts violently with water and burns.
The aqueous solution of the insurance powder is unstable in nature and has a strong reducing property, belonging to a strong reducing agent. It is easily exposed to oxygen in the air and oxidizes. At the same time, it easily absorbs moisture and degenerates, and it can seize oxygen in the air and give off a pungent sour taste.


I. Technical Data sheet of Sodium Hydrosulfite : 

Index	Technical Grade			Food Additive
Na2S2O4	≥ 90%	≥ 88%	≥ 85%	≥ 88%
Iron (Fe)	≤20ppm	≤ 20ppm	≤ 20ppm	≤ 20ppm
Zinc (Zn)	≤ 1ppm	≤ 1ppm	≤ 1ppm	≤ 1ppm
solution appearance	clear	clear	clear	clear
EDTA	/	/	/	qualified
Arsenic(As)	/	/	/	≤ 1ppm
Other heavy metal( As Pb)	≤ 1ppm	≤ 1ppm	≤ 1ppm	≤ 1ppm
Formate (As HCHO)	/	/	/	≤ 0.05%
water insolubles	≤ 0.05%	≤ 0.05%	≤ 0.05%	/
Cadmium (Cd)	/	/	/	≤ 2ppm
Plumbum (Pb)	/	/	/	≤ 5ppm

II. Sodium Hydrosulfite Packing and Loading : 
(1) Packing: 50kg net/Drum
(2) Loading quantity :420Drums(21MT)/20'container .




III. Sodium Hydrosulfite Usage : 
1. Sodium Hydrosulfite/SHS  is widely used in the textile industry for reducing dyeing, reducing cleaning, printing and decolorizing, and for the bleaching of fabrics such as silk, wool, and nylon. Since it does not contain heavy metals, the fabric after bleaching is very bright and not easy to fade.
2. Sodium Hydrosulfite/SHS can also be used for bleaching foods, such as gelatin, sucrose, candied fruit, and bleaching of soaps, animal oils, bamboo utensils, and china clay.c
3. Sodium Hydrosulfite/SHS can also be applied to organic synthesis, such as dyes, pharmaceuticals as reducing agents or bleaches.
4. Sodium Hydrosulfite/SHS  is the most suitable bleach for wood pulp.


IV.Why us : 
Factory directly supplying
District quality control
Ensure high quality
Promptly delivery time for your order
More than ten years of exporting experience
Free sample