Which type of glove is required if there is a risk of direct contact with Metam sodium?

The correct choice indicates the necessity for using chemical-resistant gauntlet-type gloves when there is a risk of direct contact with Metam sodium. Metam sodium is a highly volatile chemical that can pose significant health risks upon direct contact with skin, including irritation and potential absorption leading to systemic exposure.

Chemical-resistant gauntlet-type gloves are designed specifically to provide a barrier against hazardous substances. They are made of materials that can withstand penetration and degradation from chemicals, ensuring that the handler's skin is protected during fumigation activities. The gauntlet design also extends protection up the arm, reducing the risk of exposure due to splashes or spills.

In contrast, latex gloves may have limitations in their resistance to certain chemicals, including pesticides like Metam sodium. Cotton gloves are not designed to resist chemicals at all, making them unsuitable for this kind of work. Mechanical gloves, while they may offer some protection against physical hazards, do not provide the chemical resistance necessary for handling substances like Metam sodium. Thus, the decision for chemical-resistant gauntlet-type gloves aligns with best practices for safety in handling hazardous chemicals.