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IVCC congratulates Mitsui Chemicals Agro on the WHO prequalification of VECTRON™ T500

15th March 2023
IVCC congratulates Mitsui Chemicals Agro on the WHO prequalification of VECTRON™ T500

Press release – date issued 15th March 2023.

IVCC is delighted to share the news that the VECTRON™ T500, a new indoor residual spray product, developed by Mitsui Chemicals Agro containing TENEBENAL™ has had its evaluation completed by the WHO Pre-Qualification vector control assessment team and has now achieved Pre-Qualifcation listing. VECTRON™ T500 represents the world’s first meta-diamide active ingredient (IRAC Group 30), with a different mode of action from existing vector control products.

WHO Pre-Qualification is an important pre-requisite supporting the adoption of VECTRON™ T500 for malaria indoor residual spraying programmes. The availability of this novel mode of action allows more choice in the rotation of insecticides, in line with best practice insecticide resistance management, which is critical to preserve the long-term efficacy of vector control tools. VECTRON™ T500 has outstanding efficacy against malaria vector mosquitoes including strains and populations resistant to pyrethroids and some other insecticides. It works on a variety of types of wall surfaces, including mud, and shows long residual efficacy.  VECTRON™ T500 is a non-repellent, odourless and stainless formulation with low mammalian acute toxicity, and is supplied in easy-to-handle 50g aluminum sachets.

Mitsui Chemicals Agro will launch VECTRON™ T500 in sub-Saharan African countries in 2023 in line with locally required conditions of use.

Justin McBeath, CEO of IVCC added: “We would like to congratulate Mitsui Chemical Agro on achieving WHO prequalification of this important product. We would also like to acknowledge the important role that the WHO Pre-Qualification Unit plays in ensuring that products such as these are thoroughly assessed for efficacy, safety and quality in readiness for their availability for malaria prevention programmes . Solutions such as VECTRON™ T500 provide a means to better manage insecticide resistance – which is one of the biggest threats to achieving the goal of malaria elimination.  IVCC was established with a mission to work with partners such as Mitsui Chemicals Agro to accelerate the availability of new public health insecticides.  We are delighted to have continued to deliver on our mission by providing support to Mitsui Chemicals Agro on this journey, which represents such a significant milestone in the fight against malaria.”

President & CEO of Mitsui Chemicals Agro said: “Mitsui Chemicals Agro is an R&D driven chemical company, that has been developing malaria vector control products to save human lives. Our mission is to provide solutions to health challenges through the development and deployment of innovative, high-quality products. We are committed to malaria eradication and are excited about the launch of VECTRON T500. We appreciate the support of all our stakeholders and partners including IVCC in reaching this important milestone.”

IRS village trial in Lagos, Nigeria. Photographed by IVCC.

Notes to Editors


IVCC is the only Product Development Partnership (PDP) working in vector control. IVCC was established in 2005, through an initial $50 million grant to the Liverpool School of Tropical Medicine (LSTM) from the Bill & Melinda Gates Foundation and has since provided ongoing support for IVCC activities.  As a registered charity in the UK, IVCC is also funded by UK Aid, USAID and the Swiss Agency for Development and Cooperation to work with stakeholders to facilitate the development of novel and improved public health insecticides and formulations to combat the rapidly growing problem of insecticide resistance.  In addition, IVCC is also funded by Unitaid and the Global Fund to implement catalytic market access projects, such as NgenIRS and the New Nets Project which support the rapid and scaled deployment of innovative vector control interventions.  IVCC brings together partners from industry, the public sector and academia to create new solutions to prevent disease transmission. By focusing resources and targeting practical scientific solutions we accelerate the process from innovation to impact.

Mitsui Chemicals Agro, Inc.

Mitsui Chemicals Agro is an R&D driven company that is a global provider of solutions by high-quality products and services in the agrochemicals field. The company has a history of about 100 years beginning with the manufacture and release of the first synthetic agrochemical in Japan. Mitsui Chemicals Agro has been contributing human health and comfortable life through PPM (Professional Pest Management) business, providing unique active ingredients and formulated products. Mitsui Chemicals Agro is 100% subsidiary of Mitsui Chemicals (Tokyo: 4183, ISIN: JP3888300005) which has an annual sale of 1,612 billion yen in the fiscal year ending March 2022.

You can find Mitsui’s press release here.

Featured image photographed by Mitsui Chemicals Agro.

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