Tien Chu chemicals factory, Ma Tau Kok/To Kwa Wan [c.1937-????]
A large factory of the Tien Chu Chemical Industries (HK) Ltd was located at 72 Pak Tai Street, Ma Tau Kok/To Kwa Wan and is marked on the 1956 Kowloon map. It occupied a 200,000 ft2 site, and manufactured food additives/powders and raw chemicals, including caustic soda and hydrochloric acid.
It is also referred to as Tien Chu Ve-Tsin Chemical Industries Company.
Sources:
Industrial History of HK website: https://industrialhistoryhk.org/tien-chu-company/