Corporate Profile

Corporate Profile

Zhongcheng develops, manufactures and markets specialty chemicals and services worldwide. Zhongcheng is the largest supplier of sodium hydrosulfite in the world.

Mission Statement

Our goal is to supply our customers the most cost-effective and highest quality chemicals and services. We believe we can only succeed if our customers do. We are committed to achieving total customer satisfaction through responsible management and delivery of our promises.


AZ Chemicals, Inc serves North American customers’ need for a more reliable and cost effective source of sodium hydrosulfite and sodium percarbonate. We bring to America over 10 years of Guangdong Zhongcheng’s experience and expertise in handling hydrosulfite.

Established in 1993, Guangdong Zhongcheng is a privately held chemical company headquartered in Dongguan, Guangdong, China. The company is a specialty chemical producer with principal businesses in the pulp & paper, textile and consumer household products industries.

Zhongcheng Worldwide Sodium
Hydrosulfite Capacity Share

Through 10 years of technology innovations, focus and disciplined management, Zhongcheng has vaulted to the No. 1 position in capacity and market share among the world’s sodium hydrosulfite producers. With an annual capacity of over 190,000MT, we represent over 30% of the world’s total sodium hydrosulfite capacity.

We conduct business in an ethical manner that reflects our respect for our customers, our employees, our environment, and our shareholders.

We operate two manufacturing plants in China.


Producing quality chemicals safely requires relentless attention to details and rigorous discipline. We operate under a meticulous and well regarded international management system. We are proud to be ISO 9001:2000 certified as of October 2001 for the "design, production and servicing of sodium hydrosulfite, sodium metabisulfite, sodium hyposulfite, anhydrous sodium sulfite, liquid carbon dioxide". We will continuously improve the quality of our products through the hard work and dedication of our employees.

Zhongcheng is committed to sustainable and responsible development. We pioneered, within our industry, the recovery of four by-products in our manufacturing processes.

  • carbon dioxide
  • sodium sulfite
  • sodium thiosulfate
  • high purity hydrogen

We are actively pursing ISO14000 and OSHMS 18000 certifications.

© 2002 AZ Chemicals, Inc. Alr rights reserved.