How does cosmetology relate to chemistry?

Cosmetology, defined. Cosmetology means the practice of performing for compensation any or all (1) of the acts of arranging, dressing, curling, waving ... (4) “Hairdressing and cosmetology” means the art of dressing, arranging ... (4) to include pedicures in the definition of hairdressing and cosmetology; P.A. ... Should you receive your initial credential in the months leading up to this date, you are still required to renew your license by the statutorily defined date. “Cosmetologist” means a person who is licensed to engage in the practice of cosmetology in this state under the authority of this chapter. (4) “Cosmetology” ... S. “Salon” means a licensed establishment operated for the purpose of engaging in the practice of cosmetology, or manicuring and pedicuring, or esthetics ... ... which cosmetology, barbering, eyebrow threading, hairstyling or ... hair by any means; provided that hairstyling does not include hair braiding;. dye, brush, apply hair tonics, beautify, or otherwise treat by any means the hair of any person. Cosmetologists may apply decorative embellishments such as ... 47(4) 48“Cosmetology” means the mechanical or chemical treatment of the head, face, and scalp for aesthetic rather than medical purposes, including, ... (1) "Beauty shop" or "salon" means any premises upon or within which cosmetology is practiced for a fee. These terms shall not include the premises wherein ... (n) “Specialty license” means an electrologist license, esthetician license, manicurist license, or natural hair cultivation license. (o) “Specialty service” ...