Sodium Hydrosulfite, Sodium Hydrosulphite

By: Az Chemicals  09-12-2011
Keywords: Packaging, Pulp and Paper, Bulk Containers

Sodium hydrosulfite is a very effective reducing agent. Our sodium hydrosulfite comes in solid white crystalline powder form.

Designed for flexible volume usage, solid sodium hydrosulfite can be transported easily and stored for an extended period of time. It has wide applications in various industries, including textile, pulp and paper, Kaolin clay, and water treatment.

Flexible yet safe

Sodium hydrosulfite is highly stable if stored and kept carefully. Our solid hydrosulfite has a shelf life of over 12 months. We provide a wide variety of packaging, 50KG drums, 100KG, 200KG to 1,800MT Intermediate Bulk Containers (IBC). We give you the option to choose the most appropriate packaging to minimize package handling and air exposure. All our solid hydrosulfite comes with inner liners as an extra precaution against moisture and water.

Patented Innovative bulk packaging

Designed for volume users, our UN-approved IBC pioneered the industry’s first patented bulk packaging for marine transportation. Key benefits of the IBC include

  • Safety - Unique inner liners prevent moisture and water
  • Convenience - Designed for easy mechanical operation by forklift
  • Dust free and odorless - The liners trap all powder and odor when the bag is emptied
  • No packaging material handling - All packaging materials, include drums and liners, can be returned to us.

Common Applications

Sodium hydrosulfite is commonly used in the pulp and paper industry for bleaching brightening and de-colorization of virgin and recycled fiber. It is also applied extensively to brighten Kaolin clay. In textiles, the primary usage is in processing vat dyes and indigo dyes. Other applications include water treatment, leather processing and food bleaching (sugar, honey and gelatin).

Product specifications


Our solid sodium hydrosulfite is highly stable when stored in dry closed containers. However, solid sodium hydrosulfite is a very reactive chemical which can decompose when exposed to air and moisture or in contact with small amount of water. Decomposition will result in spontaneous ignition and liberation of toxic SO2. The chemical reacts violently with oxidants and will explode or combust.

Storage and handling

Our product must be always handled and stored in sealed clean iron drums or bulk containers. Avoid contacts with moisture, acids, oxidizing chemicals and combustible organic substances. Protect it from heat, direct sunlight, sparks and naked flames. Avoid damaging the packaging.

In the event of fire, use large quantities of water to extinguish the product. Other extinguishing media may not stop decomposition thoroughly. For details, please refer to the updated MSDS.

Material Safety Data Sheet (MSDS)

Keywords: Bulk Containers, Intermediate Bulk Containers, Packaging, Pulp and Paper, Sodium Hydrosulfite

Contact Az Chemicals

Email - none provided

Print this page

Other products and services from Az Chemicals


Sodium Metabisulfite

Store the product in a cool and dry place; prevent from direct sunlight, water and moisture; avoid contact with strong acid, oxidants or poisonous substances. Bleaching agent for textile fibers; color stripping and dechlorination; preparation of indigo vat Dye. Sodium metabisulfite oxidize to sodium sulfate easily when exposing to moisture. We produce two grades of sodium metabisulfite: Technical and Food.


Sodium Percarbonate

Designed to be an effective oxidizing bleach agent, sodium percarbonate serves as an environment-friendly alternative to chlorine bleach. Also known as solid hydrogen peroxide, SPC is an addition of hydrogen peroxide and sodium carbonate. When involved in a fire or exposed to high temperature, SPC may decompose to yield oxygen and steam. The product itself is not combustible but contacts with combustible substances may cause ignition.


Solution Sodium Hydrosulfite

Our solution hydrosulfite comes from pre-dissolving our powder hydrosulfite, the same chemical that many industries have relied on for decades for its effective reductive capabilities. Our solution hydrosulfite is available in more locations due to our dissolving facilities' simple design and low capital requirement. It also has wide application in the Kaolin clay industry, acting as a reducing agent and brightening the clay.