Plan a trial for your application
Acidification in leather dyeing and finishing
Record pH changes in the bath and hide core, and compare shade uniformity.
Wet-processing pH checks
On the same leather lot at the actual float ratio, compare acidification curves and penetration.
Purchase specifications and incoming inspection
Review these properties when selecting and inspecting incoming material. Example figures refer to the cited grade or source. Confirm the offered specification, packaging and lead time in the quotation. BASF · Formic acid identity and applications ↗
| Property | Unit | Published or agreed specification | Test conditions and checks |
|---|---|---|---|
| Formic acid assay | % by mass | Agree for the grade and end use | State the titration or chromatographic method. |
| Specified metals | mg/kg | Agree for the grade and end use | List the checks required for light-coloured leather. |
| Density | g/cm³ | Agree for the grade and end use | Specify temperature and assess the result together with assay. |
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
Match corrosion-resistant container, seal, net weight and discharge connection to the actual concentration.
Storage and handling
Check storage and transport against the grade SDS and route. Specify dispatch and delivery dates.
Sample and order lead times
State the concentration or hydrate, initial net quantity, destination and unloading method. Confirm minimum order, pallet or truckload quantity, dispatch point and arrival date separately.
Questions from the plant
Why did the shade shift after adding the old weight of acid?
Compare actual acid assay, liquor ratio and the staged acidification record.
Why does the centre of the hide differ when bath pH meets target?
Check sample location, penetration time, hide thickness and the measurement at the centre.
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 Formic acid assay, Specified metals, Density.
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.