Airgas Signs Agreement with Hudson Technologies for Sale of Airgas-Refrigerants, Inc. Subsidiary

RADNOR, Pa.–(BUSINESS WIRE)–Airgas, an Air Liquide company and a leading U.S. supplier of industrial
gases, welding technologies, and safety products, today announced
that it has signed an agreement with Hudson Technologies, Inc. (NASDAQ:
HDSN) to sell Airgas-Refrigerants, Inc.
, its subsidiary specializing
in the distribution, packaging and reclamation of refrigerant gases.

Hudson Technologies, Inc., headquartered in Pearl River, NY, is a
leading provider of innovative and sustainable solutions for optimizing
performance and enhancing reliability of commercial and industrial
chiller plants and refrigeration systems.

The transaction is subject to customary closing conditions. Both parties
currently expect the transaction to be completed in 2017.

About Airgas

Airgas, an Air Liquide company, is the leading U.S. supplier of
industrial, medical and specialty gases, as well as hardgoods and
related products; one of the largest U.S. suppliers of safety products;
and a leading U.S. supplier of refrigerants, ammonia products, and
process chemicals.

Dedicated to improving the performance of its more than 1 million
customers, Airgas safely and reliably provides products, services and
expertise through its more than 18,000 associates, over 1,100 locations,
robust e-Business platform, and Airgas Total Access telesales channel.

As an Air Liquide company, the world leader in gases, technology and
services for Industry and Health, Airgas offers customers an unrivaled
global footprint and industry leading technology and innovations.

For more information, please visit www.airgas.com.

The
world leader in gases, technologies and services for Industry and
Health, Air Liquide is present in 80 countries with approximately 65,000
employees and serves more than 3 million customers and patients. Oxygen,
nitrogen and hydrogen are essential small molecules for life, matter and
energy. They embody Air Liquide’s scientific territory and have been at
the core of the company’s activities since its creation in 1902.

Air Liquide’s ambition is to lead its industry, deliver long term
performance and contribute to sustainability. The company’s
customer-centric transformation strategy aims at profitable growth over
the long term. It relies on operational excellence, selective
investments, open innovation and a network organization implemented by
the Group worldwide. Through the commitment and inventiveness of its
people, Air Liquide leverages energy and environment transition, changes
in healthcare and digitization, and delivers greater value to all its
stakeholders.

Air Liquide’s revenue amounted to € 18.1 billion in 2016 and its
solutions that protect life and the environment represented more than
40% of sales. Air Liquide is listed on the Euronext Paris stock exchange
(compartment A) and belongs to the CAC 40, EURO STOXX 50 and FTSE4Good
indexes.

Contacts

Airgas Communications
Sarah Boxler, +1 610-263-8260
or
U.S.
Investor Relations

Joseph Marczely, +1 610-263-8277