The precursor of 21 Chemical Co., Ltd. was Z121 Factory was established on September 7^th, 1966 while the war of national liberation was at its most fierce. Over 50 years of construction and development, with the efforts and silent contributions of generations of workers, the Company was honored twice to receive the title of Hero of the People’s Armed Forces and Hero of Labor in the Doi Moi.

In 1975, the South was completely liberated and unified the country, Factory performed strategic tasks assigned by the Party, the State and the Army to participate in the production of products for the national economy. The main products are combustion detectors, electric detonators serving the mining, construction, and transportation industries.

In 1987, Factory changed from the mechanism of subsidy administrative management to business accounting regulation. The transformation has created momentum to promote the Factory to develop production with the investment in a series of new lines. Industrial slow-fire wire production lines, Ammonite explosive production, and Explosive wire production lines came into existence, contributing to diversifying products of the Company, creating jobs and improving the standard of living for workers.

Since 1993, under the new mechanism of the State, Z121 Factory has the business transaction name of 21 Chemical Company. With the right to take initiative in business accounting, the Company has outlined a new direction, focusing on rearranging the management apparatus, departments, workshops, rearranging labor, rationalizing production lines to suit production conditions, developing production of economic goods to ensure life for workers.

In 1996, with the orientation of expanding the production line, creating products with outstanding features, the Company invested in building Electric Differential Detonator and Non-electric Differential Detonator. Utilizing the available capacity of the detonator production line, with the spirit of “promoting intrinsic strength”, through researching foreign products of the same type, in 2001, the Company produced and supplied to the market. Differential Detectors products are safe with quality up to international standards. The production and consumption of different types of detonators has timely met the needs of the mining industry, building materials annually saves the State millions of dollars by not having to be imported. The research work on manufacturing differential detonators was awarded the VIFOTEC Scientific Innovation Award in 2004, the non-electric differential detonator production was awarded the VIFOTEC Scientific Innovation Award in 2006. It is the recognition of the results of creative labor in Science and Technology activities of 21 Chemical Company, becoming a driving force for the Company in the course of Science and Technology activities later.

In 1997, the Company invested in building a large-scale fireworks production line, its fireworks products quickly dominated the Japanese and American markets, and at the same time served the need to enjoy the art of flowers firework of the majority of people in occasions and festivals are highly appreciated by the people nationwide. In 2001, the factory successfully researched and produced low-altitude fireworks. In 2015, the Company completed the project of investment in building a fireworks production line and a modern defense material warehouse, meeting the production of fireworks for domestic and foreign markets. With its own advantages, the products have been used by the Government in traditional Tet holidays and festivals nationwide.

Since 2002, the Company has applied the Quality Management System ISO 9001: 2000 to the production and business activities of the Company. The system has been certified by the Vietnam Standards Compliance Certification Center (Quacert) since August 2002. The advanced quality management system contributes to improving product quality, making order in scientific management, increasing efficiency in business. 21 Chemical Company  laboratory is certified to comply with the requirements of VILAS 231 in the field of Chemistry; recognized for the ability to inspect and calibrate measuring equipment and test the quality of pyrotechnic ignition devices in the Army.

From October 2010, 21 Chemical Company changed its name to 21 Chemical One Member Limited Liability Company.

21 Chemical Co., Ltd. is a large company specializing in the production of explosives, industrial explosive accessories serving the mining industry, construction throughout the country, manufacturing signaling and safety products. To produce fireworks, artillery firebendings serving for the occasion of festivals and for export, and at the same time, produce military products for the Army.

With its outstanding achievements in production and defense service, the Z121 Factory was commended by the State as the Hero of People’s Armed Forces (December 1989).

Regarding outstanding achievements in production, business, building strong units, ensuring jobs and improving the living standards of workers, 21 Chemical Company  has been awarded the title Hero of Labor in the Doi Moi (December 2004); Fatherland Defense Order (September 2016).

Currently, the Company has become a leading defense company in Vietnam in the field of production and supply of explosives, explosive accessories for the mining and construction industry; at the same time is also the only company in Vietnam that produces fireworks, firebendings for festivals across the country and exports to the US, Japan, Singapore, Laos … markets to become one of the national defense companies actively participates in national economic development.