Cottonseed oil is part of the oils with ceramides, which was discussed in Using Ceramides in Natural Oils for Moisturised & Healthy Hair. It has a ceramide concentration of 54%. The oil is obtained from the seeds of cotton plants of different varieties and is used as a dressing for salad and for baking in the US.
It has a high smoking point of around 450°F making it suitable for heat styling and contains a significant amount of vitamin E, which contributes to its stability. It contains 26% saturated fatty acids and 17% monounsaturated fatty acids.
However, when it comes to consumption, cottonseed oil shouldn’t be at the top of your list as the disparity in the high amount of saturated fat and low amount monounsaturated fat makes it unsuitable. Additionally, because it isn’t classified as a food crop, it’s possible farmers may use a lot of chemicals when growing it as a result. Given this information, I would recommend bypassing cottonseed oil altogether. There are healthier food grade oils to add to your rotation for hair and health.
If you would like to know more about how to use natural oils for specific purposes to get more effective use out of them, you may want to check out How to Grow Hair Healthy & Long with Natural Oils, a guide which goes in-depth into which specific oil (s) works for each hair issues for optimal length and health.