When procurement teams evaluate an industrial enzyme for production lines, the purchase decision rarely hinges on “what it is” alone. It hinges on specifications that translate into measurable performance: activity units, purity indicators, formulation details, and storage requirements that protect lot-to-lot consistency. This guide summarizes the most important data points buyers should request and verify before issuing a PO for an industrial enzyme.

Activity units that matter: U/g vs U/mL

Enzyme strength is typically reported as activity in defined units. The two most common formats are:

• U/g (activity per gram of dry product or concentrate)


• U/mL (activity per mL of liquid formulation)

For solids, U/g helps compare powders and granulates under the same test method. For liquids, U/mL is essential because viscosity, solids content, and water activity can vary. Always ask for the assay conditions tied to the stated activity (e.g., substrate identity, buffer system, temperature, pH, and reaction time). If an industrial enzyme is marketed as “high activity,” procurement should still confirm that the activity is measured under conditions compatible with your process window.

Specify the test method and performance envelope

Beyond the number, the assay method determines whether the activity will translate to your plant. Request:

• Assay temperature (commonly 25–60 °C depending on enzyme class)


• Assay pH (often provided as pH target and buffer type)


• Reaction time (e.g., minutes or hours)


• Substrate concentration and whether it is saturating or process-relevant

In many applications, an industrial enzyme’s effective performance depends on your actual process pH and temperature. Buyers should ask whether the supplier provides activity profiles across pH (for example, pH 4.0–9.0) and temperature ranges. This reduces the risk of under-dosing or over-dosing when transferring between sites.

Purity, formulation, and solids content

Activity values are only meaningful when the formulation is understood. Key procurement questions include:

• Protein content (e.g., mg/g) and whether activity is expressed on total product or on protein basis


• Dry matter / solids content for liquids and concentrates


• Stabilizers and excipients used in the formulation


• Impurities relevant to your downstream steps (e.g., salts, residuals, or carrier materials)

If you are comparing two lots of an industrial enzyme, request a CoA that includes both activity and composition. For example, a liquid with lower U/mL might still be more economical if it has higher total solids and lower dosing volume. Conversely, a powder with higher U/g can be less cost-effective if it has poor flow properties or contains a higher fraction of inert carriers.

Storage requirements: temperature, moisture, and shelf-life

Storage is where many specification gaps appear. An industrial enzyme can lose activity due to thermal stress, moisture exposure, or repeated freeze–thaw cycles. Buyers should require explicit storage guidance:

• Recommended temperature (e.g., refrigerated storage vs controlled ambient)


• Maximum exposure limits during handling and transport


• Moisture sensitivity for powders (packaging type and humidity constraints)


• Shelf-life with an “as shipped” activity specification and an end-of-shelf target

Ask for stability data and how it is measured. https://enzymeshift.com/learn/guide-meat-processing-enzymes/ will provide a shelf-life statement tied to the same assay conditions used for the initial activity declaration. If your facility uses cold rooms, confirm the supplier’s recommendations for staging, thawing (if applicable), and re-freezing policy for liquid enzyme concentrates.

Examples of specification fields to request in the CoA

To streamline vendor comparisons, procurement can standardize a request template for each industrial enzyme product:

• Product form: powder, granule, or liquid; target solids content


• Declared activity: U/g or U/mL and the assay method reference


• Assay conditions: pH, temperature, substrate, and reaction time


• Purity / composition: protein content, excipients, and relevant impurity limits


• Microbiological or safety documentation where required by your internal standards


• Storage and handling: temperature range, packaging, moisture control, and shelf-life


• Lot traceability: lot number, manufacturing date, and retest date

Even when CAS numbers are not provided for enzyme mixtures, suppliers may list CAS for specific formulation components (where applicable). Procurement can request the supplier’s chemical inventory summary if your regulatory or EHS workflows require it.

Ordering strategy for consistent performance

For stable dosing, procure an industrial enzyme with clear lot-to-lot comparability. Consider:

• Safety stock sizing based on shelf-life at your storage temperature


• Incoming inspection using a quick activity check aligned to your internal assay method


• Change control if formulation or stabilizer systems change between lots


• Documentation readiness for audits: CoA, SDS, and handling instructions

At Enzymeshift, the practical goal is simple: ensure each industrial enzyme you receive can be translated into predictable dosing, stable storage, and measurable performance on your line. By focusing on activity units, assay conditions, and storage requirements during vendor evaluation, procurement teams reduce variability and improve production planning.

If you’d like, share your process pH and operating temperature range, and we can help map the requested industrial enzyme specifications to the assay conditions that best reflect your application.