It is also increasing production of ethanol at one of its plants with the goal of making available a further 220,000 litres.
Usual customer Gull NZ has joined in by testing another 250,000 litres in its tanks of fuel grade ethanol to see if it is suitable for sanitisers.
Fonterra chief executive Miles Hurrell said the company was working with the Government on the priorities for frontline services.
Fonterra subsidiary Lactanol is among only a few companies in the world making ethanol alcohol from casein whey.
It sells bonded alcohol and ethanol for cleaning products and motor fuel additives.
Ethanol grades are either 96% or 99% pure and Fonterra produces 15 million litres a year in normal times.
