2-Phosphonobutane-1, 2, 4-Tricarboxylic Acid


CAS No.: 37971-36-1
Other Name: PBTC
Molecular Formula: C7H11O9P
Molecular Weight: 270.13

PBTCA has low content of phosphoric, has structural features of both phosphoric acid and carboxylic acid group, which enable its excellent scale and corrosion inhibition properties. Its antiscale property under high temperature is far better than that of organic phosphonic acid. It can improve zinc salt solubility and good composite synergy, and it resists well the oxidation by chlorine.

Items Index
Appearance Clear, colorless to pale yellow aqueous solution
Active acid % 50.0min
Phosphorous acid (PO33-)% 0.5 max
Phosphoric acid (PO43-)% 0.2 max
Density (20 ℃ ) g/cm3 1.27 min
pH(1% water solution) 1.5~2.0
Fe ppm 10.0 max
Chloride ppm 10.0 max

PTBCA is a high efficient agent as scale and corrosion inhibitor. It is the excellent stabilizer for zinc salt. It is widely used in circulating cooling water system and oilfield refill water system as scale and corrosion inhibitor, suitable to composite with zinc salt and copolymer. It can be used in situations of high temperature, high hardness, high alkali and high concentration index. In lavation fields, it is used as chelating agent and metal detergent.
PBTCA 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.

Package and Storage:
Normally in 250kg plastic drum, IBC drum can also be used as required. Storage for one year in shady and dry places in room.

Safety Protection:
Acidic. Avoid contact with eyes or skin. In case of contact, rinse with plenty of clean water.

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