Plan a trial for your application
High-temperature cooling-water scale control
Use representative process water to compare actual deposits at the target temperature and concentration.
Water treatment blend compatibility
In the same water, pH and formulation, check turbidity, storage stability and in-use dispersion.
Purchase specifications and incoming inspection
Include the intended grade or current specification in the enquiry. Use the table to compare selection criteria and inspection conditions. The specification agreed by both parties defines the contractual limits. Shandong Taihe · Hydrolyzed polymaleic anhydride product literature ↗
| Property | Unit | Published or agreed specification | Test conditions and checks |
|---|---|---|---|
| Solids content | Mass fraction | Agree for the offered HPMA grade. | Record drying temperature and duration. Compare at equal active solids. |
| Average molecular weight | g/mol | Specify the offered grade and characterization method. | Confirm the molecular-weight averaging convention and method calibration basis. |
| Solution pH | Dimensionless | Agree for the target concentration. | Specify test temperature and dilution. This is distinct from an acid value expressed on a mass basis. |
When approving a sample, record the grade, methods, limits and specification revision. On receipt, match the packing lot number to the lot-specific COA and record the measured values and release decision.
From samples to commercial delivery
Packaging and receiving
For liquid supply specify net mass per drum, container material and low-temperature transport conditions. Agree any colour limit in advance.
Storage and handling
Record receipt temperature. Measure relative density at the agreed temperature and keep an unopened reference for lot comparisons.
Sample and order lead times
State treatment scale, trial quantity and acceptable packaging. Request minimum quantities, preparation times and arrival dates for lab samples, pilot lots and routine replenishment.
Questions from the plant
Why do samples with equal solids perform differently at high temperature?
Use site water at representative temperature and residence time. Record deposits and formulation compatibility.
Does solids content establish HPMA scale inhibition?
Check molecular-weight characterisation and acid-group data. Compare at actual hardness, temperature and concentration.
Report a delivery or batch issue
Include the order number, lot number from the package, label photos and inspection records for the affected lot. When retesting, check active solids, molecular weight range, Acid value.
Request documents for your application
TDS · Technical data sheet
For grade selection and sample approval, specify the grade and revision required.
SDS · Safety data sheet
Specify the country or region of use and the required language.
COA · Certificate of analysis
Request a sample COA during supplier review. For incoming inspection, provide the actual lot number.