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Electrolytic Manganese Dioxide

Electrolytic Manganese Dioxide is the critical component of the battery cathode mix in today’s alkaline & lihtium ion batteries. Improved cell performance often relies upon improvements in the raw material.

ERACHEM Electrolytic Manganese Dioxide (EMD) – the key raw material for alkaline & lithium ion batteries.

Specifically designed for high performance alkaline dry cell batteries, ERACHEM Electrolytic Manganese Dioxide (EMD) is a high activity gamma MnO2 with excellent particle size distribution, low metallic impurities, and outstanding electrochemical properties.

The primary battery market is a very competitive industry: alkaline and lithium ion battery manufacturers are working at higher production speed to increase productivity and reduce cost.  They need quality consistency of their raw materials to insure smooth production of their high speed lines. Hence we have installed improved production processes and implemented very stringent production controls and scorecards to insure the highest EMD product consistency. ERACHEM Electrolytic Manganese Dioxide (EMD) products are also well suited for cathode mix in bulk energy storage & energy management for portable power and integrating solar and wind renewable energy.

Sustainability and Continuous improvement at the heart of our activity

Being a partner in the global community, we have developed sustainable processes which reduce the environmental impact and rank best-in-class in the industry. We have direct sourcing and logistic control of the high quality Mn Ore from Gabon; thereby reduces by-product emissions.

Our plants are implementing a continuous process improvement plan to insure ever increasing quality at the lowest cost.

With 20% of the global production, ERACHEM is one of the world leading Electrolytic Manganese Dioxide (EMD) producers

Our operations in New Johnsonville, TN (US) and Chongzuo (China) have a capacity to produce an annual output of 55,000 tons/year of EMD making ERACHEM is a world leader in high performance electrolytic manganese dioxide production with capabilities to supply our customers in North America, Europe, and Asia.

As a world leader in the industry, ERACHEM continues to invest to further improvements of our processes, increase capacity, and develop new electrolytic manganese dioxide (EMD) grades for the future.

Our commitment to meet and exceed market requirements, combined with our close working global relationships with pioneers in the battery manufacturing industry, allows our R&D team to design the highest quality products on the market.

In addition to EMD, we also supply Natural Manganese Dioxide (NMD), which provides a high level of performance for Zinc-Carbon batteries manufacturers.

AA, AAA, C&D, 9V
High performance

Supplying for years the primary batteries industry, our Manganese-based products are used in AA, AAA, C&D and 9 voltsbatteries manufactured by the industry pioneers. This requires high consistency as well as important production units, which make ERACHEM Comilog the most reliable EMD supplier.

EAB 111

EAB 111 is the main raw material for primary batteries. It features high consistency, and is used by the industry pioneers in the US, mainly. Our New Johnsonville plant is the largest North-American EMD production facility.


K-60 is the historical basic raw material for alkaline batteries. Our New Johnsonville plant has been supplyng K-60 for years, but is now allocating more volumes to EAB 111 which is a highly performing products, in line with evolving customer requirements.  

Specifically designed for high performance batteries, and in order to improve our customers' manufacturing process: exceeding customers' expectations at all times.


Z-100 is a relatively new EMD grade, specifically designed for high performance products. It enhances battery quality and performance, as well as improving our customers' manufacturing process.

Manufactured at our Chongzuo plant (China), our GK-series product range offers multiple grades and particle size distribution for specific customer requirements. Our production units work in a coutinuous improvement mode insuring quality and customer satisfaction.


Our Chongzuo production facility focuses on providing high quality products meeting stringent customers requirements. Our GK-Series is a proof-of-concept of our ability to design tailor-made products, with different particle size distribution for specific demand.