Table of Contents
Part 1 Market Overview
    1.1 Market Definition
    1.2 Market Development
        1.2.1 Current Situation
        1.2.2 Aspects of COVID-19 Impact
    1.3 By Type
                Table Type of Acetic Anhydride (CAS 108-24-7)
                Figure Global Acetic Anhydride (CAS 108-24-7) Market Share by Type in 2019
    1.4 By Application
                Table Application of Acetic Anhydride (CAS 108-24-7)
                Figure Global Acetic Anhydride (CAS 108-24-7) Market Share by Application in 2019
    1.5 By Region
                Figure Global Acetic Anhydride (CAS 108-24-7) Market Share by Region in 2019
                Figure Asia Acetic Anhydride (CAS 108-24-7) Market Share by Region in 2019
Part 2 Key Companies
    2.1 Eastman (USA)
        2.1.1 Company Profile
                Table Eastman (USA) Overview List
        2.1.2 Products & Services Overview
        2.1.3 Sales Data List
                Table Acetic Anhydride (CAS 108-24-7) Business Operation of Eastman (USA) (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
    2.2 Celanese (USA)
    2.3 Lonza (Switzerland)
    2.4 BP (UK)
    2.5 BASF (Germany)
    2.6 Jubilant Life Sciences (India)
Part 3 Global Market Status and Future Forecast
    3.1 Global Market by Region
                Table Global Acetic Anhydride (CAS 108-24-7) Market by Region, 2015-2019 (Million USD)
                Figure Global Acetic Anhydride (CAS 108-24-7) Market Share by Region in 2019 (Million USD)
                Table Global Acetic Anhydride (CAS 108-24-7) Market by Region, 2015-2019 (Volume)
                Figure Global Acetic Anhydride (CAS 108-24-7) Market Share by Region in 2019 (Volume)
                Table Price List by Region, 2015-2019
    3.2 Global Market by Company
                Table Global Acetic Anhydride (CAS 108-24-7) Market by Company, 2015-2019 (Million USD)
                Figure Global Acetic Anhydride (CAS 108-24-7) Market Share by Company in 2019 (Million USD)
                Table Global Acetic Anhydride (CAS 108-24-7) Market by Company, 2015-2019 (Volume)
                Figure Global Acetic Anhydride (CAS 108-24-7) Market Share by Company in 2019 (Volume)
                Table Price List by Company, 2015-2019
    3.3 Global Market by Type
                Table Global Acetic Anhydride (CAS 108-24-7) Market by Type, 2015-2019 (Million USD)
                Figure Global Acetic Anhydride (CAS 108-24-7) Market Share by Type in 2019 (Million USD)
                Table Global Acetic Anhydride (CAS 108-24-7) Market by Type, 2015-2019 (Volume)
                Figure Global Acetic Anhydride (CAS 108-24-7) Market Share by Type in 2019 (Volume)
                Table Price List by Type, 2015-2019
    3.4 Global Market by Application
                Table Global Acetic Anhydride (CAS 108-24-7) Market by Application, 2015-2019 (Million USD)
                Figure Global Acetic Anhydride (CAS 108-24-7) Market Share by Application in 2019 (Million USD)
                Table Global Acetic Anhydride (CAS 108-24-7) Market by Application, 2015-2019 (Volume)
                Figure Global Acetic Anhydride (CAS 108-24-7) Market Share by Application in 2019 (Volume)
                Table Price List by Application, 2015-2019
    3.5 Global Market by Forecast
                Figure Global Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Global Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
Part 4 Asia-Pacific Market Status and Future Forecast
    4.1 Asia-Pacific Market by Type
                Table Asia-Pacific Acetic Anhydride (CAS 108-24-7) Market by Type, 2015-2019 (Million USD)
                Figure Asia-Pacific Acetic Anhydride (CAS 108-24-7) Market Share by Type in 2019 (Million USD)
                Table Asia-Pacific Acetic Anhydride (CAS 108-24-7) Market by Type, 2015-2019 (Volume)
                Figure Asia-Pacific Acetic Anhydride (CAS 108-24-7) Market Share by Type in 2019 (Volume)
                Table Price List by Type, 2015-2019
    4.2 Asia-Pacific Market by Application
                Table Asia-Pacific Acetic Anhydride (CAS 108-24-7) Market by Application, 2015-2019 (Million USD)
                Figure Asia-Pacific Acetic Anhydride (CAS 108-24-7) Market Share by Application in 2019 (Million USD)
                Table Asia-Pacific Acetic Anhydride (CAS 108-24-7) Market by Application, 2015-2019 (Volume)
                Figure Asia-Pacific Acetic Anhydride (CAS 108-24-7) Market Share by Application in 2019 (Volume)
                Table Price List by Application, 2015-2019
    4.3 Asia-Pacific Market by Geography
        4.3.1 China Market Status and Future Forecast
                Figure China Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure China Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure China Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure China Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        4.3.2 Southeast Asia Market Status and Future Forecast
                Figure Southeast Asia Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Southeast Asia Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Southeast Asia Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Southeast Asia Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        4.3.3 India Market Status and Future Forecast
                Figure India Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure India Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure India Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure India Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        4.3.4 Japan Market Status and Future Forecast
                Figure Japan Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Japan Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Japan Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Japan Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        4.3.5 Korea Market Status and Future Forecast
                Figure Korea Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Korea Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Korea Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Korea Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        4.3.6 Oceania Market Status and Future Forecast
                Figure Oceania Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Oceania Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Oceania Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Oceania Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
    4.4 Asia-Pacific Market by Forecast
                Figure Asia-Pacific Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Asia-Pacific Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
Part 5 Europe Market Status and Future Forecast
    5.1 Europe Market by Type
                Table Europe Acetic Anhydride (CAS 108-24-7) Market by Type, 2015-2019 (Million USD)
                Figure Europe Acetic Anhydride (CAS 108-24-7) Market Share by Type in 2019 (Million USD)
                Table Europe Acetic Anhydride (CAS 108-24-7) Market by Type, 2015-2019 (Volume)
                Figure Europe Acetic Anhydride (CAS 108-24-7) Market Share by Type in 2019 (Volume)
                Table Price List by Type, 2015-2019
    5.2 Europe Market by Application
                Table Europe Acetic Anhydride (CAS 108-24-7) Market by Application, 2015-2019 (Million USD)
                Figure Europe Acetic Anhydride (CAS 108-24-7) Market Share by Application in 2019 (Million USD)
                Table Europe Acetic Anhydride (CAS 108-24-7) Market by Application, 2015-2019 (Volume)
                Figure Europe Acetic Anhydride (CAS 108-24-7) Market Share by Application in 2019 (Volume)
                Table Price List by Application, 2015-2019
    5.3 Europe Market by Geography
        5.3.1 Germany Market Status and Future Forecast
                Figure Germany Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Germany Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Germany Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Germany Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        5.3.2 UK Market Status and Future Forecast
                Figure UK Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure UK Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure UK Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure UK Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        5.3.3 France Market Status and Future Forecast
                Figure France Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure France Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure France Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure France Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        5.3.4 Italy Market Status and Future Forecast
                Figure Italy Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Italy Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Italy Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Italy Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        5.3.5 Russia Market Status and Future Forecast
                Figure Russia Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Russia Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Russia Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Russia Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        5.3.6 Spain Market Status and Future Forecast
                Figure Spain Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Spain Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Spain Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Spain Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        5.3.6 Netherlands Market Status and Future Forecast
                Figure Netherlands Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Netherlands Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Netherlands Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Netherlands Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        5.3.7 Turkey Market Status and Future Forecast
                Figure Turkey Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Turkey Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Turkey Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Turkey Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        5.3.6 Switzerland Market Status and Future Forecast
                Figure Switzerland Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Switzerland Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Switzerland Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Switzerland Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
    5.4 Europe Market by Forecast
                Figure Europe Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Europe Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
Part 6 North America Market Status and Future Forecast
    6.1 North America Market by Type
                Table North America Acetic Anhydride (CAS 108-24-7) Market by Type, 2015-2019 (Million USD)
                Figure North America Acetic Anhydride (CAS 108-24-7) Market Share by Type in 2019 (Million USD)
                Table North America Acetic Anhydride (CAS 108-24-7) Market by Type, 2015-2019 (Volume)
                Figure North America Acetic Anhydride (CAS 108-24-7) Market Share by Type in 2019 (Volume)
                Table Price List by Type, 2015-2019
    6.2 North America Market by Application
                Table North America Acetic Anhydride (CAS 108-24-7) Market by Application, 2015-2019 (Million USD)
                Figure North America Acetic Anhydride (CAS 108-24-7) Market Share by Application in 2019 (Million USD)
                Table North America Acetic Anhydride (CAS 108-24-7) Market by Application, 2015-2019 (Volume)
                Figure North America Acetic Anhydride (CAS 108-24-7) Market Share by Application in 2019 (Volume)
                Table Price List by Application, 2015-2019
    6.3 North America Market by Geography
        6.3.1 United States Market Status and Future Forecast
                Figure United States Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure United States Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure United States Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure United States Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        6.3.2 Canada Market Status and Future Forecast
                Figure Canada Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Canada Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Canada Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Canada Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        6.3.3 Mexico Market Status and Future Forecast
                Figure Mexico Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Mexico Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Mexico Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Mexico Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
    6.4 North America Market by Forecast
                Figure North America Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure North America Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
Part 7 South America Market Status and Future Forecast
    7.1 South America Market by Type
                Table South America Acetic Anhydride (CAS 108-24-7) Market by Type, 2015-2019 (Million USD)
                Figure South America Acetic Anhydride (CAS 108-24-7) Market Share by Type in 2019 (Million USD)
                Table South America Acetic Anhydride (CAS 108-24-7) Market by Type, 2015-2019 (Volume)
                Figure South America Acetic Anhydride (CAS 108-24-7) Market Share by Type in 2019 (Volume)
                Table Price List by Type, 2015-2019
    7.2 South America Market by Application
                Table South America Acetic Anhydride (CAS 108-24-7) Market by Application, 2015-2019 (Million USD)
                Figure South America Acetic Anhydride (CAS 108-24-7) Market Share by Application in 2019 (Million USD)
                Table South America Acetic Anhydride (CAS 108-24-7) Market by Application, 2015-2019 (Volume)
                Figure South America Acetic Anhydride (CAS 108-24-7) Market Share by Application in 2019 (Volume)
                Table Price List by Application, 2015-2019
    7.3 South America Market by Geography
        7.3.1 Brazil Market Status and Future Forecast
                Figure Brazil Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Brazil Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Brazil Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Brazil Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        7.3.2 Argentina Market Status and Future Forecast
                Figure Argentina Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Argentina Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Argentina Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Argentina Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        7.3.3 Columbia Market Status and Future Forecast
                Figure Columbia Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Columbia Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Columbia Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Columbia Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        7.3.4 Chile Market Status and Future Forecast
                Figure Chile Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Chile Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Chile Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Chile Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        7.3.5 Peru Market Status and Future Forecast
                Figure Peru Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure Peru Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure Peru Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Peru Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
    7.4 South America Market by Forecast
                Figure South America Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure South America Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
Part 8 Middle East & Africa Market Status and Future Forecast
    8.1 Middle East & Africa Market by Type
                Table Middle East & Africa Acetic Anhydride (CAS 108-24-7) Market by Type, 2015-2019 (Million USD)
                Figure Middle East & Africa Acetic Anhydride (CAS 108-24-7) Market Share by Type in 2019 (Million USD)
                Table Middle East & Africa Acetic Anhydride (CAS 108-24-7) Market by Type, 2015-2019 (Volume)
                Figure Middle East & Africa Acetic Anhydride (CAS 108-24-7) Market Share by Type in 2019 (Volume)
                Table Price List by Type, 2015-2019
    8.2 Middle East & Africa Market by Application
                Table Middle East & Africa Acetic Anhydride (CAS 108-24-7) Market by Application, 2015-2019 (Million USD)
                Figure Middle East & Africa Acetic Anhydride (CAS 108-24-7) Market Share by Application in 2019 (Million USD)
                Table Middle East & Africa Acetic Anhydride (CAS 108-24-7) Market by Application, 2015-2019 (Volume)
                Figure Middle East & Africa Acetic Anhydride (CAS 108-24-7) Market Share by Application in 2019 (Volume)
                Table Price List by Application, 2015-2019
    8.3 Middle East & Africa Market by Geography
        8.3.1 GCC Market Status and Future Forecast
                Figure GCC Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure GCC Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure GCC Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure GCC Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        8.3.2 North Africa Market Status and Future Forecast
                Figure North Africa Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure North Africa Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure North Africa Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure North Africa Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
        8.3.3 South Africa Market Status and Future Forecast
                Figure South Africa Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Million USD)
                Figure South Africa Acetic Anhydride (CAS 108-24-7) Market Market Status, 2015-2019  (Volume)
                Figure South Africa Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure South Africa Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
    8.4 Middle East & Africa Market by Forecast
                Figure Middle East & Africa Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Million USD)
                Figure Middle East & Africa Acetic Anhydride (CAS 108-24-7) Market Forecast, 2020-2025 (Volume)
Part 9 Market Features
    9.1 Product Features
    9.2 Price Features
    9.3 Channel Features
    9.4 Purchasing Features
Part 10 Investment Opportunity
    10.1 Regional Investment Opportunity
    10.2 Industry Investment Opportunity
PART 11 Coronavirus Impact
    11.1 Impact on Industry Upstream
    11.2 Impact on Industry Downstream
    11.3 Impact on Industry Channels
    11.4 Impact on Industry Competition
    11.5 Impact on Industry Obtain Employment
Part 12 Conclusion