Specialty Phosphonate CAS 130668-24-5

PAPEMP / PAPMP 40%

ZEELCHEM™ 141

Polyamino Polyether Methylene Phosphonate represents the latest evolution in scale inhibition technology. Features extraordinary calcium tolerance (>2,000 ppm CaCO₃) and excellent silica scale dispersion in high-stress, high-pH cooling water circuits.

Official Technical Documents Available
Request Commercial Quote Dosing Calculator

Technical Specification Target

Chemical Class:Polyamino Polyether Phosphonate
CAS Number:130668-24-5
Active Content:40.0 – 43.0% min
Total Phosphorous (as PO₄³⁻):≥ 15.0%
Specific Gravity:1.15 – 1.25 g/cm³
pH (1% Aqueous):1.5 – 3.0
Calcium Tolerance:> 2,000 ppm as CaCO₃
Standard Packaging:60kg, 250kg Drum, 1250kg IBC

High Calcium Concentration & Silica Dispersion

Standard phosphonates (like ATMP and HEDP) precipitate when calcium hardness exceeds 500-800 ppm, aggravating heat exchanger scaling. PAPEMP possesses a unique polyether amine backbone that provides complete calcium tolerance up to 2,000 ppm CaCO₃.

It also stabilizes reactive silica, preventing the formation of glass-like colloidal silica scale on reverse osmosis membranes and high-stress refinery cooling loops.

Standard Industrial Dosage

ApplicationRecommended Dosing
High Hardness / High pH Cooling Loops5.0 – 20.0 ppm
High Recovery Reverse Osmosis2.0 – 6.0 ppm
Oilfield Waterflooding (High Salinity Brine)10.0 – 30.0 ppm
Textile Auxiliary Bleaching Chelation1.0 – 3.0 g/L

Packaging, Handling & Storage

  • Packaging Options: 60 kg carboys, 250 kg virgin HDPE drums, 1,250 kg IBC totes, and road tankers.
  • Storage Conditions: Store in acid-proof containers in a dry, ventilated area away from direct sunlight.
  • Shelf Life: 24 months in sealed original packaging.
  • Handling Safety: Mildly acidic. Standard PPE (gloves, safety goggles) required.
ZLD Compatible: Designed for Zero Liquid Discharge facilities where cooling water cycles are operated up to the absolute limits of solubility.
Technical Knowledgebase

Frequently Asked Questions: PAPEMP / PAPMP 40%

Expert technical answers on dosing, chemistry, handling, and application performance.

Q1. What is PAPEMP 40% (ZEELCHEM™ 141) and why is it unique?

PAPEMP (Polyamino Polyether Methylene Phosphonate, CAS 130668-24-5) is a specialty phosphonate with high calcium tolerance (>2,000 ppm CaCO₃) and superior silica scale dispersion.

Q2. What systems benefit most from PAPEMP antiscalant?

Zero Liquid Discharge (ZLD) cooling towers, extreme high-cycle cooling loops, and high-recovery reverse osmosis systems with high silica and hardness.

Q3. What is the recommended dosage of PAPEMP 40%?

Typical dosage ranges from 5.0 to 20.0 ppm active in high-hardness cooling water, and 2.0 to 6.0 ppm in high-recovery RO feedwaters.