Cal. HSC § 111675

Section 111670 shall not apply to coal tar hair dye, that is conspicuously labeled as follows: “Caution—this product contains ingredients that may cause skin irritation on certain individuals and a preliminary test according to accompanying directions should first be made. This product must not be used for dyeing the eyelashes or eyebrows; to do so may cause blindness.” The labeling shall also bear adequate directions for such preliminary testing.