Phosphonate PBTC
Description
PBTC is a 50% active aqueous solution of 2-phosphonobutane-1, 2, 4-tricarboxylic acid. It acts as a crystal modifying agent and threshold inhibitor for calcium and other metal salts. PBTC is widely used in industry as a sequestering agent and calcium carbonate scale inhibitor. In systems that utilize oxidizing microbiocides, such as chlorine and bromine, PBTC exhibits superior stability under oxidizing conditions compared to other organophosphonate compounds.
Applications
Cooling Water Treatment
Reverse Osmosis Formulations
Industrial Cleaners
Dispersion/Deflocculation applications
Textiles
Metal Finishing
Bottle washing
Typical Properties
Appearance
Clear to yellow
pH
<2
Iron (ppm as Fe)
<5
Density
2.5
% active
50
Cloride %
<10
Phosphoric Acid %
<0.25
Viscosity (20°C cST)
20
Packaging and Handling
PBTC is a water soluble acidic liquid packaged in non-returnable drums. Like all aqueous solutions, PBTC may freeze if exposed to very low temperatures. Store where the temperature stays above 0°C (32°F). Should the product freeze, store it in a warm area until completely thawed. Keep container closed when not in use.
Toxicology/Ecological Data
Acute Oral toxicity - LD50 - rats - >5000 mg/kg
Eye irritation - rabbit
moderately irritating, 24 h
Skin irritation - rabbit
non irritating, 24 h
Environmental Toxicity
Invertebrates
48 h, EC50 Daphnia magna - > 300 mg/1
Fish
98 h, LC50 Rainbow trout - > 1000 mg/1
Logistics
PBTC is supplied in polyethylene drum containing 530 pounds per drum
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