Non-Triazine H2S Scavenger (EDDM): A Triazine-Free Alternative
Vasudev Chemo Pharma manufactures a non-triazine H2S scavenger — EDDM (ethylenedioxy dimethanol, CAS 3586-55-8) — as a triazine-free alternative that avoids amine pH shift, salt precipitation, and catalyst poisoning. This guide explains what it is and when to choose it.
Vasudev Chemo Pharma Technical Team
ISO 9001:2015 Certified Manufacturer of Industrial & Specialty Chemicals
A Non-Triazine H2S Scavenger From Vasudev Chemo Pharma
Alongside its triazine range, Vasudev Chemo Pharma manufactures a non-triazine H2S scavenger — EDDM, or (ethylenedioxy)dimethanol, CAS 3586-55-8 — for operators who need a triazine-free option. EDDM is a clear to pale-yellow liquid supplied at 90% or higher active content. Unlike MEA or MMA triazine, which are built on an amine-derived triazine ring, EDDM is a formaldehyde-donor chemistry with a glycol backbone and no triazine structure and no amine group. That structural difference is the whole point: it changes how the scavenger behaves in the field, making it the preferred choice for specific applications where triazine by-products or amine chemistry cause problems. Offering both chemistries lets us match the product to the stream rather than forcing one solution onto every problem.
- EDDM (CAS 3586-55-8) — non-triazine, non-amine formaldehyde-donor scavenger
- No pH shift, no salt precipitation, no catalyst poisoning
- Ambient-temperature reaction; water-soluble products; also a biocide
- Best for offshore, refinery, high-scaling, and multiphase service
- Triazine still wins on cost for straightforward bulk gas/crude duty
How EDDM Removes H2S
EDDM is a slow-release formaldehyde donor. In service it liberates formaldehyde, which reacts with hydrogen sulfide to form water-soluble, non-volatile products, permanently removing the H2S from the stream. The reaction proceeds at ambient temperature, so no heating is required, and because EDDM contains no nitrogen or amine functionality, it does not raise system pH the way an amine triazine can. The same formaldehyde-donor action gives EDDM broad-spectrum biocidal activity, which is why the compound also serves as an in-can preservative and industrial biocide. For H2S duty, the practical takeaways are: permanent (non-regenerative) removal, ambient-temperature reaction, water-soluble products, and no pH shift.
When to Choose Non-Triazine Over Triazine
A non-triazine scavenger is the better engineering choice in several specific situations. Choose EDDM when amine pH shift must be avoided — for example, in systems sensitive to pH-driven scaling or downstream chemistry. Choose it in high-scaling environments, because EDDM does not precipitate the carbonate or amine salts that can accompany triazine chemistry. Choose it where refinery catalysts are downstream, since EDDM does not carry the amine that can poison certain catalysts. And choose it for multiphase produced fluids where its behaviour improves handling. For straightforward, cost-driven bulk gas or crude duty, MEA Triazine 78% usually remains more economical per kilogram of H2S removed — so the decision is genuinely stream-specific, not a blanket recommendation.
EDDM vs MEA Triazine at a Glance
Both EDDM and MEA Triazine are effective, non-regenerative H2S scavengers, but they differ in chemistry and behaviour. MEA Triazine is amine-based, offers the highest capacity per litre, and is the most economical for bulk duty, but it can raise pH, add an amine odour, and form dithiazine by-products. EDDM is non-triazine and non-amine, operates across a wide pH range without shifting it, does not form scale, does not poison catalysts, and adds slow-release biocidal protection — advantages that matter offshore, in refineries, and in high-scaling systems, typically at a higher cost per kg H2S than triazine. Because Vasudev Chemo Pharma makes both, we can bench-compare them on your actual fluid and recommend the more suitable and economical option.
Applications and Supply
EDDM is applied to non-triazine H2S scavenging in natural gas, crude oil desulphurisation, produced-water H2S treatment, pipeline and wellhead H2S removal, and biogas desulphurisation, as well as water-treatment and preservation duties that exploit its biocidal action. It is manufactured at our ISO 9001:2015 certified facility in India and exported globally in drums, IBCs, and bulk, with Certificate of Analysis, Technical Data Sheet, and GHS-compliant Safety Data Sheet for every batch. As with our triazine range, free samples are available for qualification, and our technical team can help you decide between triazine and non-triazine chemistry for your specific stream.
Non-triazine chemistry is not a replacement for triazine — it is the right answer to a specific set of problems: pH shift, scaling, and catalyst sensitivity that triazine cannot always avoid.
Related Products & Services
For operators who need a triazine-free H2S scavenger, EDDM offers permanent H2S removal without amine pH shift, scaling, or catalyst poisoning — and Vasudev Chemo Pharma manufactures both triazine and non-triazine chemistries so the recommendation is driven by your stream, not our inventory. Contact our technical team to compare EDDM against MEA Triazine on your fluid, or request a free sample.
