Latex gloves have two drawbacks. Many people are allergic to latex and develop a rash. Latex is not impervious to some chemicals. A better choice would be the blue nitrile gloves.
Anyone who wishes to mix up their own staining developers should also wear a dust mask when dealing with solid pyrogallol or catechol (pyrocatechin). In addition to handling the solids, catechol has a measureable vapor pressure at 20oC and should be handled with good ventilation to avoid breathing the vapor. It has a distinctive medicinal smell. From the catechol MSDS, "Acute animal tests in rats, mice, guinea pigs, and rabbits have demonstrated catechol to have high acute toxicity by oral or dermal exposure." In the early days of photography when pyrogallol was the major developing agent, many photographers died from liver or kidney failure.
It is interesting to note that both catechol and hydroquinone are dihydroxybenzenes C6H4(OH)2. However the toxicity of the two chemicals is quite different. Hydroquinone is moderately tomic while catechol is quite toxic. What a difference just from the relative positions of the two hydroxyl groups.