Phosphonobutane tricarboxylic acid

Phosphonobutane tricarboxylic acid (CAS 37971-36-1), commonly abbreviated as PBTC, is a phosphonate-based organic acid used in water treatment and industrial process chemistry.

Where is Phosphonobutane tricarboxylic acid used?

• Water treatment: scale inhibitor, corrosion inhibitor and chelating agent
• Cooling water circuits and boiler systems: inhibits calcium carbonate and calcium sulfate scale
• Calcium phosphate scale control at low dosage rates
• Textile processing: sequesters hardness ions during dyeing and bleaching
• Construction chemicals: retarder and dispersant in cement and gypsum-based systems
• Personal care: stabilizes products against metal-induced degradation
• It buffers pH in aqueous product systems.

Commercial specifications

• Aqueous solution, most commonly at fifty percent active content
• Technical grade; purity and concentration verified by titration or ICP methods
• Bulk liquid supply in IBC containers or tankers