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((Short description|Japanese chemicals company))
((more citations needed|date=January 2020))
((Use mdy dates|date=April 2017))
((Infobox company
| name = Mitsui Chemicals, Inc.
| native_name = 三井化学株式会社
| native_name_lang = ja
| logo = Mitsui Chemicals.svg
| logo_size = 250px
| type = [[Public Company|Public]] ([[Kabushiki gaisha|K.K]])
| image = Tokyo Midtown-Yaesu.jpg
| image_caption = Headquarters in [[Yaesu]], [[Chuo, Tokyo]]
| traded_as = ((TYO|4183))<br>[[Nikkei 225|Nikkei 225 Component]]
| ISIN = ((ISIN|sl=n|pl=y|JP3888300005))
| founded = (((Start date and age|1997|10|01)))
| predecessor = Mitsui Petrochemicals Industries<br/>Mitsui Toatsu Chemicals
| hq_location_city = Shiodome City Center, Higashi-Shimbashi, [[Minato, Tokyo|Minato-ku, Tokyo]] 105-7122
| hq_location_country = Japan
| area_served = Worldwide
| key_people = Tsutomu Tannowa<br/><small>([[President (corporate title)|President]] and [[CEO]])</small>
| industry = [[Chemical industry|Chemicals]]
| products = ((unbulleted list|Functional chemicals|[[Polymer engineering#Materials|Polymeric materials]]|[[Chemical|Basic chemicals]]| [[Petrochemical]]s|[[Plastic film|Films and sheets]]))
| revenue = [[Japanese yen|JPY]] 1,343 billion ([[Fiscal year|FY]] 2015)
                        ([[US dollar|US$]] 11.9 billion) (FY 2015)
| net_income = JPY 22.9 billion (FY 2015)
                           (US$ 203 million) (FY 2015)
| num_employees = 13,447 (consolidated as of March 31, 2016)
| footnotes = <ref>((cite web |url=http://www.mitsuichem.com/corporate/overview/index.htm |title=Corporate Overview |publisher=Mitsui Chemicals |access-date=April 19, 2017))</ref><ref>((cite web |url=http://asia.nikkei.com/Company/05HWGX-E |title=Company Profile |work=[[Nikkei Asian Review]] |publisher=[[Nikkei Inc.]] |access-date=April 19, 2017))</ref>
| website = ((Official website|https://www.mitsuichemicals.com/))
))

((nihongo|'''Mitsui Chemicals'''|三井化学株式会社|Mitsui-Kagaku Kabushiki-gaisha)) is a Japanese [[chemical]]s company listed on the [[Nikkei 225|Nikkei]] with business interests in Japan, Europe, China, Southeast Asia and the USA. It is one of the leading chemical companies in Japan and is part of the [[Mitsui]] conglomerate.<ref>((Cite book |title=Mitsui Chemicals, Inc. |publisher=McGraw-Hill |year=2009 |pages=25 |language=en))</ref> The company mainly deals in performance materials, petrochemicals and basic chemicals and functional polymeric materials.

== History ==
Mitsui Chemicals of the Mitsui group emerged in 1968 with the merger of Toyo Koatsu and Mitsui Chemical Industry.<ref name=":0">((Cite book |last=Aftalion |first=Fred |title=A History of the International Chemical Industry |publisher=Chemical Heritage Foundation |year=2001 |isbn=0-941901-29-7 |edition=2nd |location=Philadelphia, PA |pages=316 |language=en))</ref> The former was established in 1933 and was mainly engaged in the manufacture of fertilizers while the latter was founded in 1941 and produced dyes and organic intermediates.<ref name=":0" /> The new entity focused in the production of four product lines: fertilizers; basic products (methanol, formaldehyde, phenol, aniline, bisphenol A, TDI, MDI, and melamine); polymers; and, fine chemicals.<ref name=":0" />

With the growth of opportunities in India, Mitsui Chemicals has decided to establish((When|date=March 2021)) its first [[polypropylene]] compounding plant in India at 'Japanese Investment park' Neemrana phase III. The unit being set up will be the manufacturing base of Mitsui Chemicals Group in India in which Mitsui Chemicals holds 80% equity and 20% equity is with another subsidiary, Prime Polymers Company of Japan.

In February 2021, the company stopped operations in their [[Ichihara, Chiba|Ichihara]] petrochemical complex in east Japan's [[Chiba Prefecture|Chiba prefecture]] to carry out safety inspections after an earthquake hit northeast Japan's [[Fukushima Prefecture|Fukushima prefecture]].<ref>((Cite web|date=2021-02-15|title=Earthquake forces Japanese petchem plants to shut|url=https://www.argusmedia.com/en/news/2186910-earthquake-forces-japanese-petchem-plants-to-shut|access-date=2021-03-04|website=www.argusmedia.com|language=en))</ref>

== Products ==
Mitsui makes a wide range of chemicals, lubricants, and resins. One of the technologies owned by Mitsui Chemicals is the Hypol II process, which uses a miniature loop reactor to prepolymerize catalyst.<ref>((Cite book |last=Malpass |first=Dennis B. |title=Introduction to Industrial Polypropylene: Properties, Catalysts Processes |last2=Band |first2=Elliot |publisher=John Wiley & Sons |year=2012 |isbn=978-1-118-46320-8 |language=en))</ref><ref>((Cite book |last=Albunia |first=Alexandra Romina |title=Multimodal Polymers with Supported Catalysts: Design and Production |last2=Prades |first2=Floran |last3=Jeremic |first3=Dusan |publisher=Springer |year=2019 |isbn=978-3-030-03474-0 |pages=196 |language=en))</ref>

In the consumer space, they are known for MR Lenses,<ref>((Cite web|title=MR™ ,Material for eyeglass lenses((!)) Business and Products ((!)) MITSUI CHEMICALS AMERICA, INC.|url=https://us.mitsuichemicals.com/service/product/mr-series.htm|access-date=2022-01-23|website=us.mitsuichemicals.com|language=en-usa))</ref> a [[High-refractive-index polymer|high refractive index]] (1.74) [[corrective lens]] used in consumer eyeglasses. MR Lenses are used by large direct-to-consumer manufactures, including [[Zenni Optical]].

== References ==
((Reflist))

==External links==
((Portal|Tokyo|Chemistry|Companies))
*((Official|https://www.mitsuichemicals.com))
((Mitsui|state=autocollapse))
((Nikkei 225))
((Authority control))

[[Category:Chemical companies based in Tokyo]]
[[Category:Companies listed on the Tokyo Stock Exchange]]
[[Category:Chemical companies established in 1997]]
[[Category:Japanese companies established in 1997]]
[[Category:Japanese brands]]
[[Category:Mitsui]]

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