Sodium Bisulfite

Sodium Bisulfite (NaHSO₃): A Trusted Companion in the World of Chemistry

Sodium bisulfite is a versatile compound with high reducing power, widely used in the chemical industry. As Pamu Kimya, we serve numerous industries, including textile, cosmetics, food, and water treatment, with high-quality and stable sodium bisulfite solutions. In this article, we provide a comprehensive overview of sodium bisulfite, from its chemical structure to its potential applications.

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What is Sodium Bisulfite?

Sodium bisulfite (NaHSO₃) is an inorganic compound composed of the elements sodium, hydrogen, sulfur, and oxygen. It is typically available commercially as an aqueous solution at a concentration of 30–40% . It has a slightly pungent, sulfur-like odor. To maintain its stability in solution, it should be stored at low temperatures and with minimal exposure to air.

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Chemical Properties:

• Molecular Formula: NaHSO₃

• Molar Mass: 104.06 g/mol

• Physical State: Colorless or slightly yellowish liquid

• pH (in 1M solution): 4 - 5

• Solubility: Completely soluble in water

Sodium bisulfite can act as both a reducing agent and a complexing agent due to its weak acidic nature.

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Areas of Use:

1. Water Purification

Sodium bisulfite is used in wastewater and drinking water treatment, particularly as a dechlorinator . It neutralizes excess chlorine in water treated with sodium hypochlorite.

2. Food Industry

As a food additive (E222), it acts as an antioxidant and microbial stabilizer. It is used as a color preservative in dried fruits, vegetables, and some beverages. However, its use is limited by regulations because overdose can pose a health risk.

3. Textile Industry

Sodium bisulfite acts as a color stabilizer and reducer in textile dyeing and bleaching processes. It is particularly effective in processes using indigo and sulfur dyes.

4. Paper and Pulp

It is used as a bleaching agent in paper production. It also plays a role in dissolving lignin and cleaning paper fibers.

5. Chemical and Pharmaceutical Industry

In organic synthesis, it reacts with aldehydes and ketones to form bisulfite adducts . This property makes it useful in binding harmful substances such as formaldehyde.

6. Cosmetics and Personal Care

It is used in small amounts as an antioxidant or color stabilizer in some skin care products and hair dyes.

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Advantages of Sodium Bisulfite:

• Strong reduction ability

• Fast resolution and stability

• Broad industry compatibility

• Ability to bind unwanted compounds such as formaldehyde and chlorine

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Safety and Storage Information:

• It is recommended to use with protective equipment.

• When in contact with acids, poisonous SO₂ (sulfur dioxide) gas may be released.

• It should be stored in dry, cool and well-ventilated environments, away from sunlight.

As Pamu Kimya, we provide safe shipping and consultancy services with all documents such as MSDS (Material Safety Data Sheet) and COA (Certificate of Analysis) .

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Your Quality Assurance with Pamu Kimya

You've come to the right place to get your sodium bisulfite solution tailored to your industrial needs, with high purity and sustainable production standards. We produce in concentrations and packaging options tailored to your specific needs.