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Phosphonates Antiscalants, Corrosion Inhibitors and Chelating Agents
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2-Phosphonobutane -1,2,4-Tricarboxylic Acid, Sodium salt (PBTC.Na4)

CAS No. 40372-66-5 EINECE NO. 254-894-4
Molecular Formula C7H7O9P.Na4 Molecular Weight 358
Structural Formula

PBTC.Na4 Structural Formula

Product Features

PBTC.Na4 is tetrasodium salt of 2-phosphonobutane-1, 2, 4-tricarboxylic acid (PBTC). PBTC.Na4 is a highly effective scale inhibitor for calcium carbonate and calciumphosphate. PBTC.Na4 scale inhibition property under high temperature is far better than that of organophosph-ines.

Technical Specification

Parameter Standard
Liquid Solid
Appearance Colorless to yellowish transparent liquid White crystal powder
Active content (PBTC), % 30.0min 64.0min
Active content (PBTC•Na4), % 40.0min 85.0min
Fe, mg/L - 20 max
Density (20℃),g/cm3 1.35min -
pH (1% water solution) 9.0-12.0 4.0-6.0

Applications & Usage

PBTC.Na4 is mainly used in the field of cooling & process water treatment and cleaning formulations. PBTC.Na4 can be used without adding acid, such as at any pH.

PBTC.Na4 is usually used together with zinc salt, copolymer, organophosphine, imidazole and other Water Treatment Chemicals.

PBTC.Na4 powder is recommended as dry mix ingredient in chlorine bleach cleaning formulations and in dish wash formulations. PBTC.Na4 powder also functions as a retardant in cement.

Scale and Corrosion inhibition Performance

CaCO3 inhibition CaSO4 inhibition CaF2 inhibition Iron control Sequestration
Very Good Excellent Very Good Very Good Very Good
Calcium tolerance Iron Control Sequestration Steel corrosion inhibition
Good Yes Excellent Very Good

Package & Storage

PBTC.Na4 Solid PBTC.Na4 Liquid
25L Drum Bulk Bag 25L Drum 200L Drum 1000L IBC ISO Tank
25kg Bag 200L Drum packaging
Storage for ten months in shady room and dry place.

Hazard & Safety Precaution

Hazard Information Safety Precaution

Not regulated

Wear protective gloves Wear protective goggles Wear protective clothing

Once contacted with eye and skin, flush with plenty of clean water