When you see “combustible” on an MSDS, it has a specific meaning. We normally think of “combustible” as meaning “catches fire easily.” But in regard to liquids in MSDS lingo, the meaning is different. It means the liquid is “flammable” (can ignite) if heated to 100°F. If “combustible” is missing from the MSDS, don’t assume it means the liquid can’t burn.
A related term is “flammable limits.”