ANIONIC POLYACRYLAMIDE (APAM)

Anionic Polyacrylamide (APAM) is a high-molecular-weight, water-soluble polymer containing negatively charged functional groups along its polymer chain.
Anionic Polyacrylamide (APAM) functions primarily as a flocculant, sedimentation aid, thickening agent, filtration aid, rheology modifier, and solid-liquid separation agent.
Anionic Polyacrylamide (APAM) is widely used in municipal and industrial water treatment, mining, mineral processing, papermaking, oilfield operations, agriculture, construction, and sludge-management systems.

CAS Number: 9003-05-8; specific acrylamide-acrylate copolymer grades may use alternative identifiers
EC Number: Not generally assigned as one universal number; exact regulatory identifier depends on the polymer composition and commercial grade
Molecular Formula: [(C3H5NO)m(C3H3O2Na)n]x, representative formula for a partially hydrolyzed sodium acrylate-acrylamide copolymer; composition varies by grade
Molecular Weight: Typically several million to more than 20 million g/mol, depending on the product grade

Synonyms: Anionic Polyacrylamide, APAM, Anionic PAM, Anionic Polyelectrolyte, Anionic Polyacrylamide Flocculant, Partially Hydrolyzed Polyacrylamide, PHPA, Hydrolyzed Polyacrylamide, Acrylamide-Sodium Acrylate Copolymer, Acrylamide-Acrylate Copolymer, Sodium Polyacrylate-Acrylamide Copolymer, Anionic Acrylamide Copolymer, Water-Soluble Anionic Polymer, High-Molecular-Weight Anionic Polymer, Anionic Polymer Flocculant, Anionic Coagulant Aid, Anionic Water-Treatment Polymer, Wastewater Flocculant, Mineral-Processing Flocculant, Sludge-Settling Polymer, Sedimentation Aid, Clarification Polymer, Solid-Liquid Separation Polymer, Anionic Retention Aid, Anionic Drainage Aid, Soil-Stabilizing Polymer, Erosion-Control Polyacrylamide, Oilfield Polyacrylamide, Drilling-Mud Polymer, Enhanced-Oil-Recovery Polymer, Friction-Reducing Polyacrylamide, Paper-Making Anionic Polymer, Mining-Grade APAM, Water-Treatment-Grade APAM, High-Viscosity APAM, High-Charge Anionic Polyacrylamide, Medium-Charge Anionic Polyacrylamide, Low-Charge Anionic Polyacrylamide, Granular Anionic Polyacrylamide, Powder Anionic Polyacrylamide, Anionic PAM Flocculant

APPLICATIONS

Anionic Polyacrylamide (APAM) is used as a flocculant in municipal raw-water clarification systems.
Anionic Polyacrylamide (APAM) is used as a coagulant aid with aluminum- and iron-based inorganic coagulants.
Anionic Polyacrylamide (APAM) is used to increase floc size and improve the settling rate of suspended particles.
Anionic Polyacrylamide (APAM) is used to improve clarification efficiency in sedimentation basins and clarifiers.

Anionic Polyacrylamide (APAM) is used in approved drinking-water treatment grades when permitted by applicable regulations.
Anionic Polyacrylamide (APAM) is used to strengthen flocs formed by alum, ferric salts, or polyaluminum chloride.
Anionic Polyacrylamide (APAM) is used to reduce the quantity of inorganic coagulant required in optimized treatment programs.
Anionic Polyacrylamide (APAM) is used after jar testing to determine the suitable charge density, molecular weight, and dosage.

Anionic Polyacrylamide (APAM) is used in municipal wastewater clarification.
Anionic Polyacrylamide (APAM) is used to improve suspended-solids removal in primary and secondary treatment stages.
Anionic Polyacrylamide (APAM) is used in tertiary clarification systems before filtration or water reuse.
Anionic Polyacrylamide (APAM) is used to improve the capture of fine particles that settle poorly without polymer treatment.

Anionic Polyacrylamide (APAM) is used in sludge-thickening operations.
Anionic Polyacrylamide (APAM) is used to increase the concentration of mineral-rich sludge before mechanical dewatering.
Anionic Polyacrylamide (APAM) is used to improve water release from suitably charged sludge suspensions.
Anionic Polyacrylamide (APAM) is used to reduce the volume of sludge requiring storage, transport, or disposal.

Anionic Polyacrylamide (APAM) is used with belt filter presses after sludge-specific polymer selection.
Anionic Polyacrylamide (APAM) is used with centrifuges to improve solids capture in compatible sludge systems.
Anionic Polyacrylamide (APAM) is used with screw presses and chamber filter presses.
Anionic Polyacrylamide (APAM) is used in gravity drainage systems to accelerate free-water separation.

Anionic Polyacrylamide (APAM) is used in industrial wastewater-treatment plants.
Anionic Polyacrylamide (APAM) is used to remove suspended mineral particles from process effluents.
Anionic Polyacrylamide (APAM) is used to improve clarification of wastewater containing positively charged or coagulated solids.
Anionic Polyacrylamide (APAM) is used in physicochemical treatment systems following pH adjustment and coagulation.

Anionic Polyacrylamide (APAM) is used in wastewater recycling and process-water recovery systems.
Anionic Polyacrylamide (APAM) is used to reduce turbidity before filtration or membrane-treatment stages.
Anionic Polyacrylamide (APAM) is used to improve solids capture and reduce the load on downstream equipment.
Anionic Polyacrylamide (APAM) is used to support closed-loop water-management programs in industrial facilities.

Anionic Polyacrylamide (APAM) is used in mining operations as a high-molecular-weight flocculant.
Anionic Polyacrylamide (APAM) is used to separate finely divided mineral solids from process water.
Anionic Polyacrylamide (APAM) is used to increase settling rates in mineral-processing thickeners.
Anionic Polyacrylamide (APAM) is used to improve overflow clarity in mining-water recovery circuits.

Anionic Polyacrylamide (APAM) is used in mine-tailings thickening systems.
Anionic Polyacrylamide (APAM) is used to increase underflow solids concentration in tailings thickeners.
Anionic Polyacrylamide (APAM) is used to improve water recovery from mineral tailings.
Anionic Polyacrylamide (APAM) is used in high-density and paste-thickening processes after laboratory evaluation.

Anionic Polyacrylamide (APAM) is used in flotation-tailings treatment.
Anionic Polyacrylamide (APAM) is used to flocculate fine gangue particles after mineral recovery.
Anionic Polyacrylamide (APAM) is used to improve the sedimentation of clay-containing tailings.
Anionic Polyacrylamide (APAM) is used to reduce suspended-solids concentrations in recycled flotation water.

Anionic Polyacrylamide (APAM) is used in coal-washing plants.
Anionic Polyacrylamide (APAM) is used to accelerate the settling of coal fines and mineral matter.
Anionic Polyacrylamide (APAM) is used to clarify wash water for recirculation.
Anionic Polyacrylamide (APAM) is used to improve solids recovery from coal-preparation wastewater.

Anionic Polyacrylamide (APAM) is used in sand- and gravel-washing operations.
Anionic Polyacrylamide (APAM) is used to settle fine clay, silt, and mineral particles.
Anionic Polyacrylamide (APAM) is used to improve the quality of recycled quarry water.
Anionic Polyacrylamide (APAM) is used to reduce the footprint required for settling ponds.

Anionic Polyacrylamide (APAM) is used in crushed-stone and aggregate-processing plants.
Anionic Polyacrylamide (APAM) is used in clarification systems for quarry wastewater.
Anionic Polyacrylamide (APAM) is used to improve dewatering of mineral sludge produced during aggregate washing.
Anionic Polyacrylamide (APAM) is used to reduce suspended solids in discharged or reused process water.

Anionic Polyacrylamide (APAM) is used in marble- and granite-processing wastewater.
Anionic Polyacrylamide (APAM) is used to separate stone-cutting fines from cooling water.
Anionic Polyacrylamide (APAM) is used to improve the settling of polishing and grinding residues.
Anionic Polyacrylamide (APAM) is used to support water recycling in stone-processing facilities.

Anionic Polyacrylamide (APAM) is used in dredging-slurry treatment.
Anionic Polyacrylamide (APAM) is used to accelerate sediment separation from dredged water.
Anionic Polyacrylamide (APAM) is used in geotextile-tube dewatering systems.
Anionic Polyacrylamide (APAM) is used to improve water release from mineral-rich dredged materials.

Anionic Polyacrylamide (APAM) is used in tunnel-excavation wastewater treatment.
Anionic Polyacrylamide (APAM) is used to clarify water containing rock flour, clay, and cementitious particles.
Anionic Polyacrylamide (APAM) is used in treatment systems for slurry-shield tunneling operations.
Anionic Polyacrylamide (APAM) is used to improve solids separation from construction-site process water.

Anionic Polyacrylamide (APAM) is used in drilling-fluid formulations.
Anionic Polyacrylamide (APAM) is used as a shale-encapsulation and cuttings-stabilization polymer in suitable water-based muds.
Anionic Polyacrylamide (APAM) is used to modify drilling-fluid viscosity and fluid-loss behavior.
Anionic Polyacrylamide (APAM) is used in partially hydrolyzed grades for oil, gas, water-well, and mineral drilling.

Anionic Polyacrylamide (APAM) is used to improve the transport of drilled cuttings.
Anionic Polyacrylamide (APAM) is used to reduce dispersion of reactive formations in compatible drilling systems.
Anionic Polyacrylamide (APAM) is used to improve borehole stability under selected geological conditions.
Anionic Polyacrylamide (APAM) is used in drilling systems after testing for salinity, hardness, temperature, and shear compatibility.

Anionic Polyacrylamide (APAM) is used in enhanced-oil-recovery processes.
Anionic Polyacrylamide (APAM) is used to increase the viscosity of injected water.
Anionic Polyacrylamide (APAM) is used to improve mobility control during polymer flooding.
Anionic Polyacrylamide (APAM) is used to improve sweep efficiency in suitable petroleum reservoirs.

Anionic Polyacrylamide (APAM) is used as a friction-reducing polymer in water-based oilfield fluids.
Anionic Polyacrylamide (APAM) is used to reduce turbulent pressure losses during fluid transport.
Anionic Polyacrylamide (APAM) is used in pipeline and well-service fluids after compatibility testing.
Anionic Polyacrylamide (APAM) is used in oilfield applications requiring high-molecular-weight water-soluble polymers.

Anionic Polyacrylamide (APAM) is used in produced-water treatment.
Anionic Polyacrylamide (APAM) is used to assist the separation of suspended mineral solids.
Anionic Polyacrylamide (APAM) is used in clarification systems following oil-water separation.
Anionic Polyacrylamide (APAM) is used to improve water quality before reuse, injection, or further treatment.

Anionic Polyacrylamide (APAM) is used in the pulp and paper industry as a retention aid.
Anionic Polyacrylamide (APAM) is used to improve the retention of fiber fines and mineral fillers.
Anionic Polyacrylamide (APAM) is used in microparticle retention systems containing compatible coagulants or inorganic particles.
Anionic Polyacrylamide (APAM) is used to reduce the loss of fine material into paper-machine white water.

Anionic Polyacrylamide (APAM) is used as a drainage aid in paper production.
Anionic Polyacrylamide (APAM) is used to improve water removal on the forming section.
Anionic Polyacrylamide (APAM) is used to support increased machine speed when the wet-end chemistry is properly controlled.
Anionic Polyacrylamide (APAM) is used to improve sheet formation, retention, and drainage in optimized programs.

Anionic Polyacrylamide (APAM) is used in the manufacture of fine paper, board, tissue, and recycled paper grades.
Anionic Polyacrylamide (APAM) is used in neutral and alkaline papermaking systems.
Anionic Polyacrylamide (APAM) is used with bentonite, silica, polyaluminum chloride, or other compatible wet-end additives.
Anionic Polyacrylamide (APAM) is used after machine-specific trials to establish the correct addition point and dosage.

Anionic Polyacrylamide (APAM) is used in pulp- and paper-mill wastewater treatment.
Anionic Polyacrylamide (APAM) is used to remove fibers, fillers, pigments, and suspended solids.
Anionic Polyacrylamide (APAM) is used to improve primary-clarifier and dissolved-air-flotation performance.
Anionic Polyacrylamide (APAM) is used to support recovery of reusable fiber and process water.

Anionic Polyacrylamide (APAM) is used in textile-industry wastewater treatment.
Anionic Polyacrylamide (APAM) is used after coagulation to remove suspended fibers and pigment particles.
Anionic Polyacrylamide (APAM) is used to improve clarification of dyeing and finishing effluents.
Anionic Polyacrylamide (APAM) is used to reduce solids loading before biological or advanced treatment.

Anionic Polyacrylamide (APAM) is used in tannery wastewater-treatment systems.
Anionic Polyacrylamide (APAM) is used to improve separation of coagulated suspended solids.
Anionic Polyacrylamide (APAM) is used in sludge-thickening and dewatering processes.
Anionic Polyacrylamide (APAM) is used after pH and chemical-treatment conditions have been optimized.

Anionic Polyacrylamide (APAM) is used in steel-industry wastewater treatment.
Anionic Polyacrylamide (APAM) is used to settle mill scale, iron oxides, and suspended mineral solids.
Anionic Polyacrylamide (APAM) is used in rolling-mill water clarification.
Anionic Polyacrylamide (APAM) is used to improve recycling of cooling and process water.

Anionic Polyacrylamide (APAM) is used in metallurgical-process wastewater.
Anionic Polyacrylamide (APAM) is used to clarify water containing metal hydroxide precipitates.
Anionic Polyacrylamide (APAM) is used after chemical precipitation of dissolved metals.
Anionic Polyacrylamide (APAM) is used to improve sedimentation and filtration of precipitated solids.

Anionic Polyacrylamide (APAM) is used in electroplating and surface-treatment wastewater.
Anionic Polyacrylamide (APAM) is used to flocculate precipitated metal-containing particles.
Anionic Polyacrylamide (APAM) is used to improve sludge consolidation in clarifiers.
Anionic Polyacrylamide (APAM) is used to reduce suspended-solids carryover into downstream treatment.

Anionic Polyacrylamide (APAM) is used in chemical-industry wastewater treatment.
Anionic Polyacrylamide (APAM) is used to clarify process water containing inorganic and polymeric solids.
Anionic Polyacrylamide (APAM) is used in precipitation-flocculation systems.
Anionic Polyacrylamide (APAM) is used to improve solid-liquid separation before filtration or biological treatment.

Anionic Polyacrylamide (APAM) is used in pharmaceutical-production wastewater after treatability testing.
Anionic Polyacrylamide (APAM) is used to assist the removal of suspended and coagulated solids.
Anionic Polyacrylamide (APAM) is used in clarification stages preceding advanced treatment.
Anionic Polyacrylamide (APAM) is used only after confirming compatibility with the wastewater composition.

Anionic Polyacrylamide (APAM) is used in food- and beverage-processing wastewater.
Anionic Polyacrylamide (APAM) is used to improve separation of suspended organic and mineral particles.
Anionic Polyacrylamide (APAM) is used in clarification systems following coagulation or pH adjustment.
Anionic Polyacrylamide (APAM) is used to reduce solids loading on downstream biological-treatment units.

Anionic Polyacrylamide (APAM) is used in sugar-processing clarification with appropriately approved grades.
Anionic Polyacrylamide (APAM) is used to improve the settling of suspended impurities.
Anionic Polyacrylamide (APAM) is used to increase clarification rates in suitable sugar-processing operations.
Anionic Polyacrylamide (APAM) is used only within applicable food-processing and residual-monomer requirements.

Anionic Polyacrylamide (APAM) is used in fermentation- and starch-processing wastewater.
Anionic Polyacrylamide (APAM) is used to assist separation of suspended biomass and process solids.
Anionic Polyacrylamide (APAM) is used to improve clarification before water reuse or discharge.
Anionic Polyacrylamide (APAM) is used after laboratory testing to avoid overdosing and poor floc formation.

Anionic Polyacrylamide (APAM) is used in agricultural erosion-control programs.
Anionic Polyacrylamide (APAM) is used to stabilize soil particles in irrigation furrows.
Anionic Polyacrylamide (APAM) is used to reduce sediment transport in agricultural runoff.
Anionic Polyacrylamide (APAM) is used to improve infiltration under appropriate soil and irrigation conditions.

Anionic Polyacrylamide (APAM) is used in irrigation-water management.
Anionic Polyacrylamide (APAM) is used to reduce soil-particle detachment caused by flowing water.
Anionic Polyacrylamide (APAM) is used to improve runoff-water quality by reducing suspended sediment.
Anionic Polyacrylamide (APAM) is used in approved agricultural grades containing controlled residual acrylamide.

Anionic Polyacrylamide (APAM) is used in soil-stabilization applications.
Anionic Polyacrylamide (APAM) is used to bind fine soil particles at disturbed construction sites.
Anionic Polyacrylamide (APAM) is used to reduce erosion from exposed soil surfaces.
Anionic Polyacrylamide (APAM) is used as part of integrated sediment- and erosion-control programs.

Anionic Polyacrylamide (APAM) is used in construction-site runoff treatment.
Anionic Polyacrylamide (APAM) is used to promote settling of clay and silt in temporary treatment basins.
Anionic Polyacrylamide (APAM) is used with appropriate dosing systems in sediment-control installations.
Anionic Polyacrylamide (APAM) is used only after soil-specific testing to avoid inappropriate polymer selection.

Anionic Polyacrylamide (APAM) is used in foundation- and excavation-water treatment.
Anionic Polyacrylamide (APAM) is used to remove fine mineral solids from pumped groundwater.
Anionic Polyacrylamide (APAM) is used in clarification systems for construction dewatering.
Anionic Polyacrylamide (APAM) is used to improve water quality before discharge or reuse.

Anionic Polyacrylamide (APAM) is used in ceramic-manufacturing wastewater treatment.
Anionic Polyacrylamide (APAM) is used to settle clay, glaze, and mineral particles.
Anionic Polyacrylamide (APAM) is used to improve water recovery from ceramic-process slurries.
Anionic Polyacrylamide (APAM) is used to support filter-press dewatering of ceramic sludge.

Anionic Polyacrylamide (APAM) is used in brick- and tile-manufacturing wastewater.
Anionic Polyacrylamide (APAM) is used to flocculate suspended clay and silica.
Anionic Polyacrylamide (APAM) is used to clarify cutting, grinding, and washing water.
Anionic Polyacrylamide (APAM) is used to reduce disposal volumes through improved sludge dewatering.

Anionic Polyacrylamide (APAM) is used in cement-plant wastewater treatment.
Anionic Polyacrylamide (APAM) is used to settle cement fines and mineral dust.
Anionic Polyacrylamide (APAM) is used to clarify wash water from equipment-cleaning operations.
Anionic Polyacrylamide (APAM) is used to support recycling of process water.

Anionic Polyacrylamide (APAM) is used in ready-mixed-concrete wash-water treatment.
Anionic Polyacrylamide (APAM) is used to improve separation of suspended cementitious particles.
Anionic Polyacrylamide (APAM) is used in settling and filtration systems for alkaline wash water.
Anionic Polyacrylamide (APAM) is used after pH, salinity, and dosage compatibility have been evaluated.

Anionic Polyacrylamide (APAM) is used in flue-gas-desulfurization wastewater treatment.
Anionic Polyacrylamide (APAM) is used to settle gypsum and metal-hydroxide solids.
Anionic Polyacrylamide (APAM) is used to improve clarification following chemical precipitation.
Anionic Polyacrylamide (APAM) is used to increase sludge density and reduce solids carryover.

Anionic Polyacrylamide (APAM) is used in power-plant ash-water clarification.
Anionic Polyacrylamide (APAM) is used to settle fly-ash and bottom-ash particles.
Anionic Polyacrylamide (APAM) is used to improve water recovery from ash-handling systems.
Anionic Polyacrylamide (APAM) is used to reduce turbidity in recycled process water.

Anionic Polyacrylamide (APAM) is used in municipal landfill-leachate pretreatment.
Anionic Polyacrylamide (APAM) is used after coagulation to remove suspended and precipitated solids.
Anionic Polyacrylamide (APAM) is used to reduce the particulate load on biological or membrane systems.
Anionic Polyacrylamide (APAM) is used after site-specific treatability testing.

Anionic Polyacrylamide (APAM) is used in industrial-lagoon and settling-pond treatment.
Anionic Polyacrylamide (APAM) is used to accelerate settling of fine suspended solids.
Anionic Polyacrylamide (APAM) is used to improve clarity of decanted water.
Anionic Polyacrylamide (APAM) is used to shorten settling time in appropriately designed treatment systems.

Anionic Polyacrylamide (APAM) is used in dissolved-air-flotation systems when an anionic polymer is compatible with the coagulated solids.
Anionic Polyacrylamide (APAM) is used to increase floc size before flotation.
Anionic Polyacrylamide (APAM) is used to improve solids capture in flotation sludge.
Anionic Polyacrylamide (APAM) is used to reduce fine-particle carryover from flotation units.

Anionic Polyacrylamide (APAM) is used in lamella clarifiers and inclined-plate settlers.
Anionic Polyacrylamide (APAM) is used to improve the settling behavior of coagulated particles.
Anionic Polyacrylamide (APAM) is used to increase hydraulic treatment capacity where system design permits.
Anionic Polyacrylamide (APAM) is used to improve treated-water clarity at an optimized dosage.

Anionic Polyacrylamide (APAM) is used before multimedia and sand-filtration systems.
Anionic Polyacrylamide (APAM) is used to strengthen flocs and improve filterable-particle formation.
Anionic Polyacrylamide (APAM) is used to reduce breakthrough of fine suspended solids.
Anionic Polyacrylamide (APAM) is used only at dosages that do not cause filter fouling or excessive polymer carryover.

Anionic Polyacrylamide (APAM) is used in process-water clarification before membrane treatment.
Anionic Polyacrylamide (APAM) is used to reduce suspended-solids loading on downstream membranes.
Anionic Polyacrylamide (APAM) is used as part of pretreatment systems designed to limit fouling.
Anionic Polyacrylamide (APAM) is used only after confirming membrane compatibility and controlling residual polymer.

Anionic Polyacrylamide (APAM) is used as a rheology modifier in selected aqueous industrial formulations.
Anionic Polyacrylamide (APAM) is used to increase the apparent viscosity of compatible water-based systems.
Anionic Polyacrylamide (APAM) is used to modify suspension stability and flow behavior.
Anionic Polyacrylamide (APAM) is used where high molecular weight and anionic charge provide the required performance.

Anionic Polyacrylamide (APAM) is used in automated dry-polymer preparation units.
Anionic Polyacrylamide (APAM) is used in dilute stock solutions prepared before process dosing.
Anionic Polyacrylamide (APAM) is used through metering pumps and controlled injection systems.
Anionic Polyacrylamide (APAM) is used after adequate hydration and maturation of the polymer solution.

Anionic Polyacrylamide (APAM) is used at low dosages established through jar, cylinder, or settling tests.
Anionic Polyacrylamide (APAM) is used according to the charge characteristics of the suspended particles.
Anionic Polyacrylamide (APAM) is used according to the molecular-weight requirements of the separation process.
Anionic Polyacrylamide (APAM) is used only after confirming performance under actual pH, temperature, salinity, and shear conditions.

DESCRIPTION

Anionic Polyacrylamide (APAM) is a water-soluble synthetic polymer containing negatively charged groups.
Anionic Polyacrylamide (APAM) is commonly produced by copolymerizing acrylamide with an anionic comonomer.
Anionic Polyacrylamide (APAM) may also be produced through controlled partial hydrolysis of nonionic polyacrylamide.
Anionic Polyacrylamide (APAM) commonly contains carboxylate groups distributed along the polymer chain.

Anionic Polyacrylamide (APAM) is available in a wide range of molecular weights.
Anionic Polyacrylamide (APAM) is available in low-, medium-, and high-anionic-charge grades.
Anionic Polyacrylamide (APAM) is supplied as dry powder, granules, beads, emulsions, dispersions, or aqueous solutions.
Anionic Polyacrylamide (APAM) requires grade selection according to the characteristics of the treatment system.

Anionic Polyacrylamide (APAM) dry grades generally appear as white to off-white granules or powder.
Anionic Polyacrylamide (APAM) dry particles are commonly hygroscopic.
Anionic Polyacrylamide (APAM) has little or no characteristic odor in dry form.
Anionic Polyacrylamide (APAM) forms a clear to slightly hazy viscous solution after complete hydration.

Anionic Polyacrylamide (APAM) functions mainly through polymer bridging.
Anionic Polyacrylamide (APAM) adsorbs onto suitable particle surfaces at multiple points along its extended chain.
Anionic Polyacrylamide (APAM) connects small particles to form larger and more rapidly settling flocs.
Anionic Polyacrylamide (APAM) can improve sedimentation, flotation, filtration, drainage, and dewatering.

Anionic Polyacrylamide (APAM) performance depends strongly on molecular weight.
Anionic Polyacrylamide (APAM) performance also depends on anionic-charge density and charge distribution.
Anionic Polyacrylamide (APAM) must be selected according to particle chemistry and water composition.
Anionic Polyacrylamide (APAM) may perform differently as pH, hardness, conductivity, or temperature changes.

Anionic Polyacrylamide (APAM) is generally most effective after complete dispersion and hydration.
Anionic Polyacrylamide (APAM) should be added slowly to well-agitated water during solution preparation.
Anionic Polyacrylamide (APAM) should not be dumped rapidly into water because fish-eyes and undissolved lumps may form.
Anionic Polyacrylamide (APAM) solutions usually require a maturation period before full polymer activity develops.

Anionic Polyacrylamide (APAM) can be damaged by excessive mechanical shear.
Anionic Polyacrylamide (APAM) may lose flocculation efficiency if its molecular chains are degraded by high-speed mixing.
Anionic Polyacrylamide (APAM) should be mixed sufficiently for dispersion without prolonged severe agitation.
Anionic Polyacrylamide (APAM) solutions should be transferred through appropriately sized pumps and piping.

Anionic Polyacrylamide (APAM) is highly soluble in water when correctly prepared.
Anionic Polyacrylamide (APAM) is generally insoluble in most common organic solvents.
Anionic Polyacrylamide (APAM) may hydrate more slowly in cold, saline, or hard water.
Anionic Polyacrylamide (APAM) solution-preparation water should be evaluated for contaminants and hardness.

Anionic Polyacrylamide (APAM) is a polymeric material rather than a discrete low-molecular-weight compound.
Anionic Polyacrylamide (APAM) therefore does not have one fixed molecular weight.
Anionic Polyacrylamide (APAM) does not have one universal molecular formula for every commercial grade.
Anionic Polyacrylamide (APAM) composition varies with hydrolysis level, comonomer selection, and counterion.

Anionic Polyacrylamide (APAM) commonly has molecular weights ranging from several million to more than 20 million g/mol.
Anionic Polyacrylamide (APAM) may have an anionic degree ranging from low to very high.
Anionic Polyacrylamide (APAM) may contain sodium, ammonium, or other counterions depending on manufacturing chemistry.
Anionic Polyacrylamide (APAM) technical properties must be confirmed from the grade-specific data sheet.

Anionic Polyacrylamide (APAM) may contain a small residual quantity of unreacted acrylamide monomer.
Anionic Polyacrylamide (APAM) grades intended for drinking-water or food-related processes require controlled residual-monomer levels.
Anionic Polyacrylamide (APAM) must be used within the applicable certification and maximum-use requirements.
Anionic Polyacrylamide (APAM) should not be substituted between regulated and non-regulated applications without approval.

Anionic Polyacrylamide (APAM) is generally stable when kept dry and protected from contamination.
Anionic Polyacrylamide (APAM) can absorb atmospheric moisture after packaging is opened.
Anionic Polyacrylamide (APAM) may form lumps and lose free-flowing properties when exposed to humidity.
Anionic Polyacrylamide (APAM) should be stored in tightly closed moisture-resistant packaging.

Anionic Polyacrylamide (APAM) dry powder may generate nuisance dust during transfer.
Anionic Polyacrylamide (APAM) powder and solution can make floors extremely slippery when wet.
Anionic Polyacrylamide (APAM) spills require immediate containment and careful cleanup.
Anionic Polyacrylamide (APAM) should not be washed directly into drains without appropriate control.

Anionic Polyacrylamide (APAM) normally requires dosage optimization rather than use at the highest possible concentration.
Anionic Polyacrylamide (APAM) overdosing may restabilize particles or reduce separation efficiency.
Anionic Polyacrylamide (APAM) underdosing may produce small, weak, or slowly settling flocs.
Anionic Polyacrylamide (APAM) should be evaluated through laboratory and full-scale process trials.

Anionic Polyacrylamide (APAM) should be added at a point providing effective but controlled mixing.
Anionic Polyacrylamide (APAM) should have sufficient contact time to bridge suspended particles.
Anionic Polyacrylamide (APAM) flocs should not be exposed to unnecessary high shear after formation.
Anionic Polyacrylamide (APAM) dosing should be adjusted as feed-water and process conditions change.

PROPERTIES

Product Name: Anionic Polyacrylamide (APAM)
Chemical Name: Anionic Polyacrylamide
Product Type: Water-soluble anionic polymer
Chemical Family: Polyacrylamides and acrylamide-acrylate copolymers
Primary Functions: Flocculant, sedimentation aid, filtration aid, drainage aid, thickening agent, rheology modifier, and friction reducer
Ionic Character: Anionic
Chemical Form: Polymer with variable composition
Physical Form: Powder, granules, beads, emulsion, dispersion, or solution depending on grade
Typical Dry-Grade Appearance: White to off-white free-flowing granules or powder
Odor: Generally odorless or nearly odorless
CAS Number: 9003-05-8 commonly used; exact identifier may vary by grade
EC Number: No single universal EC number for all APAM grades
Representative Formula: [(C3H5NO)m(C3H3O2Na)n]x
Polyacrylamide Repeating Unit: (C3H5NO)x
Molecular Weight: Typically several million to more than 20 million g/mol
Charge Density: Low, medium, high, or very high depending on grade
Degree of Hydrolysis: Grade dependent
Typical Solid Content of Dry Grades: Approximately 88–92% or higher, depending on grade
Typical Residual Acrylamide: Grade and regulatory-approval dependent
Solubility: Soluble in water after correct dispersion and hydration
Organic-Solvent Solubility: Generally insoluble in most common organic solvents
Solution Appearance: Clear to slightly hazy and viscous
Typical Solution pH: Grade and concentration dependent
Typical Dissolution Time: Approximately 30–60 minutes for many dry grades
Hydration Requirement: Complete wetting, dispersion, and maturation before use
Shear Stability: Sensitive to excessive mechanical shear
Moisture Sensitivity: Hygroscopic
Bulk Density: Grade dependent
Flammability: Not readily ignited under normal handling conditions; combustible decomposition products may form in a fire
Flash Point: Not applicable to dry powder
Application Concentration: Commonly prepared as a dilute stock solution before further dosing
Primary Markets: Water treatment, mining, mineral processing, drilling, oil recovery, paper, agriculture, construction, and industrial processing
Storage Conditions: Cool, dry location in sealed moisture-resistant packaging
Typical Storage Temperature: Approximately 5–30°C, subject to grade-specific instructions
Typical Shelf Life: Up to approximately 24 months in unopened packaging, depending on grade and manufacturer
Regulatory Suitability: Application and grade dependent; drinking-water and food-related uses require specifically approved products

FIRST AID

Inhalation:
Move the affected person to fresh air.
Seek medical advice if dust causes persistent coughing or respiratory irritation.

Skin Contact:
Wash thoroughly with soap and water.
Remove contaminated clothing and seek advice if irritation persists.

Eye Contact:
Rinse cautiously with clean water for at least 15 minutes.
Remove contact lenses if easy to do and obtain medical attention if irritation continues.

Ingestion:
Rinse the mouth and drink water if the person is conscious.
Do not induce vomiting; obtain medical advice if a significant quantity is swallowed.

Note to Physicians:
Treat symptomatically and provide supportive care.
Consider information on residual acrylamide from the grade-specific safety data sheet.

HANDLING AND STORAGE

Handling:
Avoid generating or inhaling polymer dust and use suitable gloves and eye protection.
Add dry polymer slowly to agitated water and avoid excessive shear after hydration.

Ventilation:
Provide general ventilation and local dust extraction at powder-transfer points.
Use suitable particulate respiratory protection when dust cannot be adequately controlled.

Storage:
Store in sealed original packaging in a cool, dry, well-ventilated area.
Protect the product from moisture, direct sunlight, heat, and contamination.

Spill and Leak Procedures:
Sweep or vacuum dry material without creating dust.
Contain wet polymer immediately because affected surfaces become extremely slippery.

Handling Precautions:
Keep solution-preparation equipment clean and dry before use.
Follow the grade-specific technical data sheet, safety data sheet, and applicable regulatory approvals.