What is the minimum flash point for a Diluent Type B?

• A. Not less than 5°C
• B. Not less than -10°C
• C. Not less than 0°C
• D. Not less than 20°C

Answer: (A)

Flash point is the lowest temperature at which a liquid’s vapors can ignite in air with an ignition source. For Diluent Type B, the safety rules set a minimum flash point of not less than 5°C. That means any diluent used as Type B must have a flash point of at least 5°C. This threshold helps ensure the liquid is not overly flammable under typical ambient conditions, reducing fire risk during handling, storage, and transport.

So, a diluent with a flash point of 6°C would qualify, while one with a flash point of 4°C would not. The other options fail the defined minimum because they imply a lower safety threshold (-10°C or 0°C) or a stricter one (20°C) than what is required by the standard.