PCA CAS 71050-62-9
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PCA CAS 71050-62-9

Phosphonyl polycarboxylic acid (PCA) is a water treatment chemical, also known as phosphonyl carboxylic acid copolymer (POCA), BELSPERSE 164, etc. Its CAS registry number is 71050-62-9. ‌
This substance is a yellowish-brown transparent liquid with an active component content of approximately 230%, and its pH value ranges from 1 to 2. Its molecular structure contains both carboxylic acid groups and phosphonyl groups, which endows it with dual functions of scale inhibition and corrosion inhibition. ‌
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  • 71050-62-9

  • bosschem

  • 71050-62-9

PCA Basic information
Product Name: PCA
CAS: 71050-62-9
MF: (C3H4O2.H3O2P.Na)x
MW: 0
EINECS: 223-267-7
Mol File: 71050-62-9.mol
PCA Chemical Properties
storage temp. 2-8°C
Odor Slight
EPA Substance Registry System Acrylic acid sodium phosphinate polymer (71050-62-9)
Items Index
Appearance Colorless to pale yellow aqueous solution
Solid content % 37.5-42.5
Total phosphor (as P) % 0.80 min
Density (20℃) g/cm³ 1.20 min
pH (as it) 3.5-4.5

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