There are many varieties of Cannabis. For Cannabis to be considered hemp, it legally must contain less than .03% of THC, the cannabinoid that is physco-active, causing the "high".
THC is the between CBD derived from marijuana and CBD from hemp oil that sets them apart.
Cannabis Sativa (Hemp) has been used for centuries to make rope, clothing, feed for animals, etc. It contains low levels THC or is THC FREE.
You can request a 3rd party test if in question as to your Hemp Extract being the chemical isolate or the Full Spectrum.