SODIUM FORMALDEHYDE SULFOXYLATE  
(Sodium Hydroxymethane Sulfinic Acid)

ROYCE S.F.S 

Chemical Formula	NaHSO2 CH20 2H20
CAS Reg. No.	149-44-0
Appearance	It is a clean white product, sold in four grind sizes : - Pea - Rice - Coarse Powder - Powder
Specifications :
Assay	98% min. (as dihydrate, by iodine titration)
pH of 2% Solution	9.5 - 10.5
Alkalinity as Sodium Hydroxide	Above 0.3%
Sulfide Content	None (tested by lead acetate paper)
Solubility in Water	Should readily make a 40% solution
Loss on Drying	20 - 24% (Azeotropic distillation)
Melting Point	63° C

Royce S. F. S.  Now also available as a stabilized Liquid! 

Custom Grinds Size
While other suppliers simply sell Sodium Formaldehyde Sulfoxylate in 2 or 3 grind sizes, packaged in 250 lb. drums, Royce manufactures and packages S. F. S. in any particle size our customer requires. Besides 250 lb. drums, we provide custom ground material in bulk bags, 50 lb. bags, 50 lb. kegs or any other package to the exact weight specified.

New Liquid
Furthermore, we are the only supplier of a stabilized liquid. This product offers maximum consistency and ease of handling. It is supplied in bulk tank wagons, semi-bulk totes, 55 gallon drums or any custom container our customers need. 

APPLICATIONS / MARKETS : Rubber: Sodium Formaldehyde Sulfoxylate is a powerful reducing agent used as a catalyst in the polymerisation of synthetic rubber and various latexes in the Paint and Adhesive industries. SFS is also widely used as an additive in the Textile processing, and most recently, in advanced water treatment systems. Polymers & Plastic: SFS is primarily used as a redox catalyst in emulsion polymerisation, where uniformity, purity, and special quality control assures consistency, high yields, and good quality polymer. It is commonly used in aqueous polymerisation at pH between 3.5 and 11. It is a very efficient oxygen scavenger, and is used as such in some polymer applications. Furthermore, as a reductive bleach, alone or in combination with a chelating agent, it can be used to brighten plastic. Textiles: Main use is as a high temperature reducing agent in the direct printing of vat dyes and as the discharging agent for discharge prints. It is also used in color stripping of dyed wool, nylon polyester and other synthetics. Adhesives: As a catalyst Paints & Coatings: As a catalyst Other Markets: Our product can also be used as a stabilizer and/or antioxidant, in industrial and fine chemical formulations. It is approved as an indirect food additive in 21 CFR for a number of applications in paper and rubber, where customers are certain that specific application is covered.

Highly skilled laboratory technicians check each and every batch of this very important chemical, as consistency is critical to the success of our customers.  

View /Download Technical Data Sheet (PDF Format)

<< Back to Products