2-Phosphonobutane-1,2,4-Tricarboxylic Acid PBTCA
CAS No. 37971-36-1
Alias: 1,2, 4-tricarboxylic acid-2-phosphonic butane; PBTC; 2-phosphonyl-1,2, 4-butane tricarboxylic acid; Phosphonyl butane tricarboxylic acid;
Molecular formula C7H11O9P
Relative molecular mass: 270.13
Structural formula
Ⅰ. Performance and use
PBTCA has low phosphorus content. Due to its structural characteristics of phosphonic acid and carboxylic acid, PBTCA has good scale inhibition and corrosion inhibition performance, which is better than the commonly used organic phosphonic acid. Especially, its scale inhibition performance is much better than the commonly used organic phosphonic acid at high temperature. PBTCA is the most widely used in the compounding of high-efficiency scale and corrosion inhibitor, and it is one of the best products with the best performance. It is widely used in the corrosion inhibition and scale inhibition of circulating cooling water system and oil field water injection system. It is especially suitable for the combination of zinc salt and copolymer. It can be used in the operation of high temperature, high hardness, high alkali and high concentration multiple.
Ⅱ. Technical indicators Accord withHG/T 3662-2010
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Item
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Indicators
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HG/T 3662-2010
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Appearance
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Colorless to pale yellow transparent liquid
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Active component（PBTCA）/%
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≥50.0
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Phosphorous acid（PO33-）/%
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≤0.5
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Orthophosphoric acid（PO43-）/%
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≤0.2
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pH（1% Aqueous solution）
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1.5～2.0
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Density（20℃）/g·cm-3
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≥1.27
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Fe content(Fe) /mg·L-1
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≤10.0
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Chloride content（Cl-） /mg·L-1
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≤10.0
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Ⅲ. Method of use
PBTCA is commonly used in combination with zinc salts, copolymers, organophosphorus, azole and other water treatment agents. If used alone, the dosage is 5~15mg/L.
Ⅳ. Packaging and storage
PBTCA is packed in plastic drums of 25Kg or 250Kg each. Store in indoor shade. The storage period is twelve months.
Ⅴ. Safety protection
PBTCA is acidic, pay attention to labor protection when operating, should avoid contact with the skin, eyes, etc., after contact with plenty of water rinse.
