Chronicle
1950/02 Our company was officially registered and established. The headquarters was set up in Taipei and the factory was set up in King Fung Street in Wenshen District.
1958/03 Began to manufacture liquid chlorine.
1974/08 Taoyuan plant was founded.
1978/01 Taoyuan plant officially started to manufacture the production of varnish, silicon-oxygen acid and other products.
1985/08 In order to the industrial development of the government, the factory and equipments in Taipei were migrated to Taoyuan plant.
1986/03 Taoyuan plant was completely extended and began to manufacture the major production of hydrochloric acid, caustic soda, liquid chlorine bleach water, varnish, silicon-oxygen acid, the same year the Taipei plant downtime.
1988/08 Began to manufacture the products of potassium hydroxide, potassium carbonate products.
1989/10 Approved by the Securities and Exchange Commission of the Ministry of Finance to re-submit the issue of shares to the public.
1990/05 The headquarters moved to the new building in 7F, No.310, Chukwang Rd., Taipei.
1990/09 The establishment of Triplex Chemical Corporation.
1991/03 Began to manufacture the product of silicate glue.
1994 Received ISO-9001 Quality Management Systems certification.
1996/06 The establishment of LeFrame Technology Co., Ltd.
1997/08 Began to manufacture the production of electronic grade hydrochloric acid, nitric acid, and potassium hydroxide.
1998/06 The establishment of E'dale Technology Co., Ltd.

2000/08

The establishment of E'Kay Technology Co., Ltd.
2004/11 Received ISO-14001 Environmental Management Systems Certification.
2005/ 3d quarter Electronic grade ammonia plant equipment commissioning completed.
2009/06 The steam power plant was built complete.
2010/03 Received OHSAS-18001 Occupational Health and Safety Assessment Series certifications
2011/05 2nd nitric acid plant been established, and started to mass produce.
2011/11 Started to operate and mass produce as 8th Electrolysis plant and 3rd Ultra high purity HCl (hydrogen chloride)plant been built.
2012/06 5th colloidal silica plant been installed.
2012/07 Start of ITDP from MOEA, focusing on High energy capacity composite anode material for lithium ion batteries.
2012/11 Add new expansion to liquid chlorine plant.
2013/01 3rd Ammonia solution been built and set to mass produce.
2013/12 9th Electrolysis plant, 3rd Nitric acid plant, and Nitric acid concentration equipment been installed.
2014/11 Started to operate the hydrogen peroxide plant.
2014/12

Received ISO-50001 Environmental Management Systems Certification.

4th Ultra high purity HCl (hydrogen chloride) plant been built.

2015/07 Received ISO 14064-1 Greenhouse gas Management Systems Certification.
2015/10 5th Ultra high purity HCl (hydrogen chloride) plant been installed, and started to mass produce.
2017/06 Established separate food additives area.
2017/12 Installed 3rd EDR system and started production.
2018/09 Held full acquisition of Triplex Chemical CORP, which originally held by Chang Chun Petrochemical Co., Ltd.
2018/10 6th Ultra high purity HCl (hydrogen chloride) plant been built, and started to mass produce.
2019/06 Expand storehouse.
2020/07 7th Ultra high purity HCl (hydrogen chloride) plant been built, and started to mass produce.
Yee Fong Chemical & Industrial Co., Ltd. TEL:886-2-23062131 FAX:886-2-23048133 7F, No.310, Chukwang Rd., Taipei, Taiwan
Professional manufacturer of chemicals and electronic chemicals products