2-Phosphonobutane - 1,2,4 - Tricarboxylic Acid
(Certified by NSF STANDARD 60 and Passed REACH Pre-registration)
CAS Number: 37971-36-1
Molecular Weight: 270
PBTC controls scale where halogen-based biocides or hypochlorite bleach are employed. Controls calcium scale formation in high stressed alkaline conditions. Its antiscale property under high temperature is far better than that of organophosphines. It can improve zinc salt solubility, has good chlorine oxidation tolerance and good composite synergy.
PBTC has been widely used in industry as a sequestering agent and calcium carbonate scale inhibitor for applications in industrial water treatment and industrial cleaning. It is usually used together with zinc salt, copolymer, organophosphine, imidazole and other Water Treatment Chemicals. When used alone, the dosage of 5-15mg/L is preferred.
Water white to pale yellow liquid
Active Acid (%)
49.0 - 51.0
Phosphorous acid as PO33- (%)
Phosphorous acid as PO43- (%)
Density at 20°C, g/cm3
Iron, as Fe (ppm)
Chloride (as Cl-,ppm)
Package and Storage:
Normally in 200L HDPE drum, 1000L IBC and ISO TANK.
Storage for 1 year in room shady and dry place.
Acidity, avoid contact with eye and skin, once contacted, flush with plenty water.