149-44-0 Sodium Formaldehyde Sulfoxylate SFS 6035-47-8 Chemical Additives

Packaging Types

Frequently Asked Questions About Sodium Formaldehyde Sulfoxylate

What is Sodium Formaldehyde Sulfoxylate

Sodium Formaldehyde Sulfoxylate, commonly known as SFS, is a white crystalline powder used as a reducing agent. It is widely applied in textile printing, dye removal, polymerization inhibition, and paper bleaching due to its stable and controlled reducing power.

What industries commonly use SFS

SFS is commonly used in the textile, paper, leather, and plastics industries. It is especially favored in vat dyeing, discharge printing, and recycling processes where selective reduction or decolorization is needed.

What is the typical concentration used in applications

SFS is usually applied in concentrations ranging from 2 percent to 10 percent, depending on the process requirements. For discharge printing, a 5 percent to 7 percent solution is often sufficient. In color stripping or reduction, the concentration may be adjusted based on fabric type and dye load.

Is SFS safe to handle

Yes, SFS is considered safe when handled properly. Although it has low toxicity, personal protective equipment such as gloves, masks, and safety glasses is recommended during handling to avoid skin or eye contact and dust inhalation.

How should SFS be stored

SFS should be stored in a cool, dry, and well-ventilated place. The packaging must be sealed to prevent moisture absorption, which can reduce product performance. Avoid exposure to direct sunlight, high temperatures, and incompatible chemicals such as oxidizers.

What is the shelf life of SFS

Under proper storage conditions, SFS typically has a shelf life of 6 to 12 months. To maintain its effectiveness, it is important to use older stock first and avoid repeated exposure to air or moisture.

Can SFS replace sodium hydrosulfite

Yes, in many cases SFS can replace sodium hydrosulfite, especially in applications where a more stable and less aggressive reducing agent is desired. SFS offers better storage stability, lower odor, and easier handling while still providing reliable reducing performance.

Does SFS leave any residues after use

When used correctly, SFS breaks down into non-toxic, water-soluble compounds. It generally does not leave harmful residues, making it suitable for processes that require clean finishes or environmentally safe outputs.

How can I test the purity of SFS

Purity is typically measured by titration to determine the active content, which should be above 85 percent in standard grades. Additional testing can include pH value, moisture content, and insoluble matter analysis, depending on application needs.

Who should I contact for technical support

For technical questions or application advice, it is best to contact the product supplier or manufacturer directly. They can provide detailed specifications, handling guides, and compatibility recommendations for your specific use case.

Company Profile

Wuxi High Mountain Hi-tech Development Co., Ltd is a professional industrial company engaged in special

chemical production, technology research & development, and import & export. The company focuses on 

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