Laizhou Laiyu Chemical Co., Ltd.
- Manufacturer of magnesium salts, brominated flame retardants, allyl compounds, and peroxides. Located in China.
- http://www.laiyu.com

Levachem Co., Ltd.
- Marketing and manufacturing pharmaceutical ingredients, dyestuff and pigment intermediates, agrochemical intermediates, and other fine chemicals.
- http://www.levachem.com/

Leffingwell & Associates
- Dedicated to serving the perfume, flavor, food and beverage community with information, products and services.
- http://www.leffingwell.com/

Lorad Chemical Corporation
- Manufacturer of advanced inorganic chemicals serving both R and D and bulk requirements in a diverse range of industries and applications. Products include: oxides, sulfides, fluorides, borides, carbides, nitrides and silicides.
- http://www.loradchemical.com/

Lonza
- Life sciences driven company and custom manufacturer of active ingredients, intermediates, APIs and biopharmaceuticals, through (bio)chemical synthesis, microbial fermentation and mammalian cell culture.
- http://www.lonza.com/

Lhoist Group
- Manufacturers of lime and other chemicals derived from limestone.
- http://www.lhoist.com/

Lyondell Chemical Europe
- This site contains information about Lyondell's operations in Europe, the Middle East and Africa.
- http://www.lyondelleurope.com/