Looking at labels for essential oils I used a Young Living label. Highest quality essential oils have this information listed. Not listed take another look, perhaps the essential oil might have been adulterated or could be an indicator of an essential oil of lower quality.
Here is what is on the Young Living Essential Oil Cypress Label
Directions clearly spelled out – 2-4 drops directly to desired area. Dilution not required, except for sensitive skin. Use as directed. Aromatic – Diffuse up to 1 hr. 3x daily.
Safety precautions right on label – Caution! Keep out of reach of children. For external use only. Keep away from eyes and mucous membranes. If you are pregnant, nursing, taking medication or have a medical condition consult a health professional prior to use. Good memory refresher and a reminder that safety precautions always should be followed.
Flammable – Do not use near fire, flame, heat or sparks. Do not store above room temperature.
Scientific name listed Young living Cypress – 100% pure therapeutic grade, essential oil 0.5 fl. oz (15 Ml). Ingredients – Cupressus Sempervivens’ (Cypress) leaf/nut/stem oil – 100% pure, therapeutic -grade essential oil.
Storage keep in cool dark place.
Distributed by Young Living Essential oils LC. Lahl, UT 84303 #3350. V6 50537
All the above information was copied right off the label and it shows the important facts that you are looking for when you are learning and trying to understand essential oils.