NOW Solutions Rosemary Oil 1 oz 100% Pure

i want to use this in my hair are there any certain types of oils i should use or can i just mix what i want and what amount to use per oil?

Is the contents in this bottle 100% Rosemary essential oil or is it mixed with a carrier oil?

Is this really from the NOW FOODS company? The logo looks different.

Can I use it for face massage.?