Formic acid (methanoic acid) is used in the production of animal feed, but also in the textile, pharmaceutical, and food industry (E 237). An Abbemat refractometer from Anton Paar can be used to easily measure formic acid solution (up to 68 %) which is important to ensure a good quality in the production process.
Invinity to build 20MWh flow battery in UK
A surprising comment for someone who (I think you´ve said in the past) worked in the industry. National Grid have a variety of reserve service schemes...