A powerful bactericide, used in the treatment of potable water and sanitation.


Chlorine is produced by electrolysis of sodium chloride and water, initially as a greenish-yellow gas with a strong odor. For transportation and storage, it is liquefied into clear amber liquid. It can be transported in tank trucks and/or isotanks, as long as they are intended for shipping the product and equipped with safety devices. Chlorine has diverse applications, essential in industrial processes, drinking water and wastewater treatment. Also used in swimming pools for disinfection, ensuring safety. Its versatility and effectiveness make it essential in modern life.

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Unipar's seals of excellence

ISO 9001
ISO 9001
ISO 9001 Certification ensures the efficiency of different integrated processes, aimed at customer satisfaction.
ISO 14001
ISO 14001
Ensures compliance with environmental laws, identification, control and reduction of environmental impacts
ISO 45001
ISO 45001
Ensures compliance with occupational health and safety legislation and seeks to minimize hazards in order to protect people.
Manufacturing process

Manufacturing process

Chlorine is produced by electrical current flowing through a pre-processed brine solution (common salt dissolved in water). This process is known as electrolysis. The other byproducts are caustic soda (sodium hydroxide or (NaOH) and hydrogen (H2). It is a liquefied gas and, for commercial purposes in that form, it goes through cooling, drying and compression stages. For each ton of chlorine, 1.1 ton of caustic soda and 0.03% tons of hydrogen are produced.

Where can chlorine be applied in our daily life?

Where can chlorine be applied in our daily life?

It is used to manufacture PVC, chlorinated solvents and agrochemicals, being essential for the treatment of potable water, swimming pools, sewerage and as an intermediate input in the production of polyurethane.

It is used to obtain other chemical products, such as: anti-coagulants, lubricants, brakes fluids, polyester fibers, pharmaceutical ingredients, etc. It is also used as a raw material to manufacture hydrogen chloride,

hydrochloric acid, sodium hypochlorite and dichloroethane.

technical information

Characteristic Information
Chemical formula Cl2
Melting point -100,98 ºC
Molecular weight 70,91
Boiling point -34,05 ºC (1 atm)
Vapor density (ar=1) 2,5
Liquid density (water=1) 1,4 a 15 ºC
Steam pressure 27,48 mm Hg a ºC
Solubility in water (% Cl2 by weight) 0,7% a 20 ºC


Production methods with environmental awareness

Sustainability is in Unipar's DNA in several aspects of our company, generating impact and enhancing financial return.
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Production methods with environmental awareness

Answers by Unipar

Frequently asked questions

What does Unipar do?

Unipar is a leading company in the production of chlorine and soda, and the second in the production of PVC in South America. It is one of the major suppliers of for sanitation and civil construction, also supplying inputs for the paper and pulp, cleaning, aluminum, textile, toy making, and pharmaceutical industries, among others.

What are the products offered by Unipar?

Different products used in our daily lives are developed from raw materials at Unipar. Always acting to defend the environment, we manufacture chemical products such as chlorine compounds and caustic soda, which are essential for the in the sanitation, textiles, and food industries, among others. Vinyl polychloride (PVC), on the on the other hand, is one of the most commonly used plastic materials in the world, by different industries, directly influencing our quality of life and contributing to a more sustainable future. Learn about the product catalog.

How do I register a social project at Unipar?

It's easy. Unipar supports entities that transform the life of communities based on positive initiatives. Every year, Unipar publishes public biddings that guide the registration of social projects. Learn about the regulations of the previous bidding notices by clicking here or register your initiative here.

How can I safely blow the whistle at the company?

Unipar works in an ethical and responsible manner in all its relationships. If you identify something that is irregular, you are safe to report it using our Hotline. We ensure your anonymity, confidentiality and our impartiality, by means of outsourced companies in charge of managing such cases.

Is there a possibility to make a visit to one of Unipar's plants?

Yes, there is. Through our Open Plant program, it is possible to visit Unipar's plants both in Brazil and in Argentina. To schedule a visit free of charge, read the required guidelines.Yes, there is. Through our Open Plant program, it is possible to visit Unipar's plants both in Brazil and in Argentina. To schedule a visit free of charge, read the required guidelines.

What is Unipar's commitment with the environment?

Our purpose is to be agents of transformation for a more sustainable world. We set forth three prerequisites for our actions: they must have a relevant impact, be aligned with our business strategy, and ensure financial return. Learn about our values.

What are the press relations contacts in Brazil and Argentina?

Journalists wishing to obtain more information about Unipar may contact the press relations group in Brazil and in Argentina. The contacts are:



FSB Comunicação


Email: unipar@fsb.com.br

Phone: +55 (11) 3165-9596



LLYC Llorente y Cuenca


Email: labal@llorenteycuenca.com

Phone: +54 (11) 5556 0700.

I’m a professional. How can I submit my CV to the company?

Unipar engages people who create chemistry. We have 1400 employees engaged with the sole purpose of being reliable in all our relationships. To participate in our recruitment processes, please type your email address in the "Join us" area to begin a relationship with the company. You will then be forwarded to the following steps.

I’m a student. What is the procedure to register for an internship at Unipar?

At Unipar, we build a healthy working environment, a space for our employees' professional and personal growth. For students, Unipar develops the Unipar Internship Program. It offers excellent opportunities for engaged, committed students to learn and grow. Expand your horizon in a company like Unipar, and make a difference.

How can I acquire Unipar's products? 47

It's easy. Contact us by registering an email address and a password. From that point on, the path to be a Unipar client begins.