Hydroquinone

Photometric determination of phosphorus, magnesium, niobium, copper, silicon and arsenic;
The polarography and capacity method of iridium;
An acid reducer;
The reducing agent of copper and gold;
To examine phosphate, tungstate, nitrate, nitrite, selenium and tellurium;
Developer;
Antioxidants.
Fertilizer industry desulfurizer
Urea synergist