Patent ID: 9277747
Filing Date: 2016-03-08
CPC Classification: A01N

Claim Text:
1. A composition comprising: a pH indicator for colouring an aqueous solution, wherein said pH indicator is bromocresol green, bromocresol purple or bromocresol blue; and; a pH modifying agent comprising one or more carbohydrate acids; and optionally an agricultural chemical for application to crops, soil or animals, wherein said agricultural chemical has an activity that varies with the pH of the water and an acceptable agricultural activity at a pH within the range of about pH 4 to about pH 6; wherein said composition is provided as a concentrate to be diluted with water, and wherein the proportions of the pH modifying agent and the pH indicator in the concentrate are such that when the concentrate is diluted with water and the pH of the water is modified by the pH modifying agent, the pH indicator indicates visually when the pH of the water is in the range of pH 4 to pH 6; and the composition is stable when stored for more than 4 months at about 40° C.