Sodium pyroantimonate

Sodium pyroantimonate (CAS 11112-10-0), also known as antimonic acid sodium salt, is an inorganic antimony compound used industrially as a flame retardant and rheology modifier.

Where is Sodium pyroantimonate used?

• Plastics and rubber compounding: flame retardant synergist
• Textile and nonwoven finishing: fire resistance in fiber treatments and fabric coatings
• Paper manufacturing: flame-retardant barrier coatings with controlled rheology for coating uniformity
• Leather processing: rheology modifier in aqueous treatment baths
• It suppresses combustion in polymer systems and adjusts flow behavior in specialty formulations.

Good to know: Particularly effective alongside halogenated systems, where antimony enhances char formation and gas-phase flame inhibition.

Commercial specifications

• Purity levels typically specified to meet industrial processing requirements
• Packaging commonly in bags or drums for bulk industrial procurement