Sodium Metabisulfite

Sodium Metabisulfite

CAS No.: 7681-57-4
Molecular Formula: Na2O5S2
Molecular Weight: 190.095
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product description

Sodium metabisulfite is a widely used inorganic compound, usually in the form of white or slightly yellowish crystalline powder or small crystals, with a strong smell of sulfur dioxide. It has a density of 1.48g/cm³, is highly soluble in water, and its aqueous solution is acidic. At 20℃, its solubility in water is 54g/100ml, and at 100℃, it is 81.7g/100ml.


Chemical Properties

PropertyValue

Melting point

>300 °C (lit.)

Density

1.48

Bulk density

1000-1200kg/m3

Refractive index

1.474

Storage temp.

Store at +5°C to +30°C.

Solubility

540 g/L (20°C)

Form

Powder/Solid

Specific Gravity

1.48

Color

White to slightly yellow

PH

3.5-5 (50g/l, H2O, 20℃)

Odor

Sulphorous

PH Range

4.5 at 50 g/l at 20 °C

Water Solubility

540 g/L (20 ºC)

Sensitive

Air & Moisture Sensitive

Merck

14,8638

Exposure limits

ACGIH: TWA 5 mg/m3NIOSH: TWA 5 mg/m3

Stability:

Stable. Incompatible with strong oxidizing agents, strong acids. Contact with strong acids releases a poisonous gas. May be moisture and air sensitive.

InChIKey

HRZFUMHJMZEROT-UHFFFAOYSA-L

CAS DataBase Reference

7681-57-4(CAS DataBase Reference)

EPA Substance Registry System

Sodium metabisulfite (7681-57-4)


Safety Information

PropertyValue

Hazard Codes

Xn,Xi

Risk Statements

22-31-41-36/37/38-52

Safety Statements

26-39-46-36-16

RIDADR

3260

OEB

B

OEL

TWA: 5 mg/m3

WGK Germany

1

RTECS

UX8225000

TSCA

Yes

HS Code

2832 10 00

PackingGroup

III

Hazardous Substances Data

7681-57-4(Hazardous Substances Data)

Toxicity

LD50 orally in Rabbit: 1540 mg/kg LD50 dermal Rat > 2000 mg/kg


Product Usage

Sodium Metabisulfite is a commonly used reducing agent and antioxidant widely applied in food, pharmaceutical, textile, and water treatment industries. In the food industry, it acts as a preservative and antioxidant to prevent browning and extend shelf life. In pharmaceuticals, it is used as a stabilizer and reducing agent in drug manufacturing. In the textile industry, it plays a role in bleaching and dyeing processes. It is also used in water treatment to remove residual chlorine, offering good chemical stability and cost-effectiveness.

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Delivery Time

Inventory 2-3 working days New manufacturing 7-10 working days

Mode of Transportation
1. By Air, fast but expensive.
2. By Sea, usual and economy.
3. By Train, suit for middle Asia countries.
4. By Express, suit for small package.
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Q1: Are Your Products Compliant With International Standards?

A1: Yes, our company holds a number of internationally recognized core certifications. All production and operation activities strictly follow international environmental, safety and quality standards, and each batch of products is accompanied by a compliance test report to meet the chemical industry requirements in different regions around the world.


Q2: Do You Provide Customized Product Services?
A2: Yes, we have a professional R&D team and refined production capacity. We can customize chemical products of different specifications and performances according to customers' specific needs, and provide full-process technical support to meet the personalized application needs of downstream industries.


Q3: What Is The Approximate Delivery Cycle Of The Products?
A3: The delivery cycle varies according to product type, order quantity and destination. We have a complete global supply chain system to ensure fast and safe delivery of goods. For specific cycle, you can consult our sales team for detailed information.


Q4: How To Obtain Product Samples?
A4: You can contact our customer service or sales team to specify the specific model and specification of the required samples. We will provide free samples according to the actual situation, and the sample express fee can be negotiated.

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