Quote Now

Solutions for Your Industry, Ready for Your Choice

Home page

Sodium Bisulphite

Sodium bisulfite, also known as acid sodium sulfite, is an inorganic compound with strong reducing properties.

Category：

Keywords：

Email:

WhatsApp/Wechat:

1. Products Information

Definition: Sodium bisulfite, also known as acid sodium sulfite, is an inorganic compound with strong reducing properties. It readily reacts with oxidizing substances and exists as a white crystalline powder at room temperature, with a pungent odor of sulfur dioxide.

Chemical Formula: NaHSO₃

Molecular Weight: 104.06

CAS No.: 7631-90-5

Common Specifications: industrial grade, food grade

Industrial Grade Food Grade

PROJECT	INDEX
Main content (Na₂S₂O₅)	64.0-67.0
Water insoluble content	0.03
chloride (cl)	0.05
Fe	0.004
Heavy metal (pb)	0.001
As content	0.0002
PH (50g/l solution)	4.0-5.0

PROJECT	INDEX
Main Content (Na₂S₂O₅),W/% ≥	58.5-67.4
Water Insoluble Matter,W/% ≤	0.01
Fe Content (mg/kg) ≤	50
As Content (mg/kg) ≤	2
Heavy Metal (pb)(mg/kg) ≤	5
Pb Content (mg/kg) ≤	2
Se Content (mg/kg) ≤	5

Storage Conditions

Store in a sealed container in a cool, dry place, avoiding contact with air to prevent oxidation and deterioration. Keep away from acids to avoid the release of toxic sulfur dioxide gas when in contact with acid or acid fumes. Also, avoid high-temperature environments to prevent thermal decomposition.

2. Physical Properties

Appearance: White or slightly yellow crystalline powder with a pungent odor of sulfur dioxide (more pronounced in moist conditions).

Density: Relative density of 1.48 g/cm³; melting point around 150℃ (decomposes at this temperature).

Solubility: Highly soluble in water (300 g/L at 20℃), with an acidic aqueous solution (pH ≈ 4.0 - 5.0). Slightly soluble in ethanol, insoluble in organic solvents such as acetone and ether.

3. Main Applications

● Food Industry

Used as a bleaching agent, preservative, and antioxidant to extend food shelf life. However, its use is restricted in some regions (e.g., Japan prohibits its use in sesame, beans, and vegetables).

● Pharmaceutical Industry

Serves as a pharmaceutical excipient and antioxidant for acidic drugs, commonly used in liquid formulations such as injections and oral preparations. It also acts as a solubilizer for aldehyde and ketone drugs, inhibiting oxidative degradation to ensure efficacy.

● Industrial Sector

Employed as a reducing agent in dye, pharmaceutical, and other industries; replaces sodium hydrosulfite in papermaking to remove chlorides from bleached fibers; effectively removes permanganate stains from skin and fabrics; and acts as a preservative for deteriorated liquids.

● Agriculture

Functions as a photorespiration inhibitor, suppressing the activity of enzymes involved in the glycolate pathway of crops, reducing carbon and energy loss during photosynthesis, and increasing crop yield by 5%-8%.

● Feed Industry

Added as a preservative and antioxidant to inhibit microbial growth and lipid oxidation in feed, protect active ingredients such as vitamins, and promote nutrient absorption in animal intestines.

4. Packaging Specifications

25kg outer woven bag (with inner lining bag)

25kg kraft paper bag (with inner lining bag)

1000kg ton bag (with inner lining bag)

1250kg large bag (with inner lining bag)

Note: According to customer needs, we also provide other packaging methods, such as ton bags, full plastic bags, kraft paper bags, and drums. Different packaging options correspond to different costs.

5. Core Advantages

● Multifunctional

Integrates antioxidation, preservation, bleaching, and reduction properties, suitable for diverse needs across food, pharmaceutical, industrial, agricultural, and feed sectors with wide application scenarios.

● High Efficiency

As an antioxidant, it rapidly scavenges free radicals and chelates metal ions to block oxidative catalytic reactions, effectively delaying material oxidation. In agriculture, small additions significantly improve crop yield; adding 0.02%-0.05% to feed notably reduces peroxide value.

● Easy to Use

Highly soluble in water, enabling uniform distribution in food, feed, pharmaceutical formulations, and other systems. Facilitates processing and application with relatively low cost, ideal for large-scale industrial use.

● Environmentally Friendly

Rapidly metabolizes with low residues in feed and other applications. Degradation products have minimal environmental impact, making it more eco-friendly than some traditional chemical preservatives.

Partner