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2-Phosphonobutane-1,2,4-Tricarboxylic Acid,Sodium salt PBTC·Na4

CAS No.40372-66-5
Molecular formula C7H7O9P·Na4
Relative molecular mass:358
Structural formula

Ⅰ. Performance and use
PBTCA·Na4 has a low phosphorus content. Due to its structural characteristics of phosphonic acid and carboxylic acid, it has good scale inhibition and corrosion inhibition performance, which is better than the commonly used organic phosphonic acid. In particular, its scale inhibition performance is much better than the commonly used organic phosphonic acid at high temperature. Solids absorb moisture easily. PBTCA·Na4 is the most widely used in the combination of highly effective scale inhibitor and corrosion inhibitor. It is one of the best products and an excellent stabilizer of zinc salt. PBTCA·Na4 is widely used for corrosion inhibition and scale inhibition in circulating cooling water system and oil field water injection system. It is especially suitable for compound use with zinc salt and copolymer. It can be used at high temperature, high hardness, high alkali and high concentration times.

Ⅱ. Technical indicators

Item	Indicators
Appearance	Colorless to pale yellow transparent liquid	White crystalline powder
Active component(PBTCA)/%	≥30.0	≥64.0
Active component(PBTC·Na4) /%	≥40.0	≥85.0
Total phosphorus content(PO43-)/%	≥10.5	≥22.5
pH(1% Aqueous solution)	9.5～10.5	4.0～6.0
Density (20℃)/g·cm-3	≥1.35	--
Fe content(Fe) /mg·L-1	--	≤20.0

Ⅲ. Use method
PBTCA·Na4 is commonly used in combination with zinc salt, copolymer, organic phosphine, azole and other water treatment agents. If used alone, the dosage is 4 ~ 15mg/L.

Ⅳ. Packaging and storage
PBTCA·Na4 shall be packed in polythene lined plastic woven bags, each bag net weight 25kg, which can also be determined according to the user's needs. Stored indoors in a cool place for 12 months.

Ⅴ. Ssafety protection
PBTCA·Na4 is weak acid, pay attention to labor protection during operation, avoid contact with skin, eyes, etc., wash with plenty of water after contact.