Technical Grade Rongalite (SFS) Sodium Formaldehyde Sulphoxylate CAS 6035-47-8 99% Purity Reducing Agent & Bleach
 
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Basic Physical and Chemical Properties of SFS

What Is SFS

Sodium Formaldehyde Sulfoxylate, often abbreviated as SFS, is a white crystalline powder widely used as a reducing agent in multiple industrial processes. It is known for its reliability, ease of use, and compatibility with water-based systems. The compound has found extensive application in textile, paper, and polymer industries.

Appearance and Physical State

SFS is typically found in the form of a fine, white crystalline or powdery solid. It is odorless or has only a faint sulfur-like smell, which makes it relatively easy to handle in factory environments. The compound is non-volatile and non-flammable under standard storage conditions.

Molecular Formula and Weight

The chemical formula of Sodium Formaldehyde Sulfoxylate is CH3NaO3S. It has a molecular weight of approximately 118.09 grams per mole. This relatively low molecular weight contributes to its quick reactivity in aqueous systems.

Solubility and pH Range

SFS is highly soluble in water, forming clear, colorless solutions. This makes it ideal for liquid-phase industrial applications. A 10 percent solution in water typically exhibits a pH value ranging between 6 and 8, indicating near-neutral behavior that minimizes the risk of corrosion or damage to equipment.

Stability and Shelf Life

When stored in a cool, dry, and well-sealed container, SFS remains stable for extended periods. However, it is sensitive to moisture and air exposure, which may reduce its activity over time. Proper storage is essential to maintain its reducing power.

Reducing Properties

SFS functions as a mild yet effective reducing agent. It can remove oxygen and break down reactive dye molecules, making it a common choice for vat dyeing, textile stripping, and polymerization inhibition. Its reducing strength is consistent, making process control more predictable and efficient.

Reactivity and Compatibility

SFS reacts readily with oxidizing agents and should not be mixed with strong acids or strong bases. It is compatible with many common textile auxiliaries and industrial additives, provided the formulations are pH-balanced and water-based.

Packaging and Handling

SFS is typically packaged in moisture-proof bags or drums to ensure product integrity during transportation and storage. Users are advised to handle it with protective gloves and avoid direct skin contact or inhalation of dust, even though it is considered low in toxicity under normal use.

 
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