Danish chemist who in 1909 introduced the concept of using the pH scale as a measure of the acidity of a solution. On Sørensen's scale, still used today, a pH of 7 is neutral; higher numbers represent alkalinity, and lower numbers acidity.
Blue represents the sky and the sea. Yellow symbolizes the sun which gives light and life. Red reflects the people and their determination to work in the future in unity and love. White stands for justice and harmony. Green recalls the land and nature. Effective date: 8 January 1996.