EDDM Dosage & Use-Level Guide by Application

For in-can preservation of water-based paints, coatings, dispersions, adhesives and detergents, EDDM is typically used at 0.10% to 0.30% active in the finished product. The exact level depends on contamination risk, storage time, temperature and formulation pH. Higher-risk or longer-storage products sit toward the upper end.

Dose EDDM to reach 0.10–0.30% active in the diluted working fluid, adjusted for contamination load, sump size and dilution ratio. It can be built into the concentrate or added tank-side to correct an infected sump. Monitor with dip-slides and top up as fluid is consumed or diluted.

Work back from the target in-use active concentration. Convert the target percentage to a decimal before calculating product quantity; for example, 0.20% active becomes 0.0020. For a 1000 kg batch using EDDM 90%, the calculation is (0.0020 × 1000) ÷ 0.90 ≈ 2.22 kg of product. Always validate microbial efficacy in your finished product before commercial use.

Only the amount of product, not the target active level. A higher grade (e.g. 95%) contains more active per kilogram, so you add slightly less product to hit the same in-use concentration. See the EDDM grades selection guide for the comparison.

Use the minimum level that achieves reliable microbial control — overdosing wastes product and, for formaldehyde-donor chemistry, raises free-formaldehyde levels in the finished product. Where free-formaldehyde limits apply, confirm the level in the finished product and keep to the lowest effective dose.

H2S scavenger dose is set by the H2S load to be removed and the contact time available, not a fixed percentage — it is determined by field conditions and jar/dynamic testing. Higher-active grades (92–95%) deliver more scavenging capacity per litre injected. Contact us for an application-specific starting dose.