3.2 Cosmetic Ingredients, INCI Labeling, and Product Functions

Three documents, three jobs

A Georgia treatment room runs on bottles. Domain 3 asks you to use different skin care products safely. Domain 1.B asks you to read chemical labeling, keep SDS files, store chemicals correctly, recognize adverse reactions, and know which federal agency owns which problem. The trap is treating the pretty jar, the ingredient list, and the SDS as the same piece of paper.

If a Duluth spa manager says "the SDS is just the ingredient list in tiny type," that manager will fail a chemical-storage question and an OSHA-style first-aid question on the same afternoon.

FDA cosmetic ingredient labeling (21 CFR 701.3)

For a retail cosmetic, the Food and Drug Administration requires an ingredient declaration. Under 21 CFR 701.3:

• Ingredients other than color additives that are present at more than 1 percent are listed in descending order of predominance. Water is usually first because it is usually the largest fraction.
• Ingredients other than colors present at 1 percent or less may be listed in any order after the greater-than-1-percent group.
• Color additives may be listed in any order after the non-color ingredients. Shade lines may use "may contain" for colors used to match batches.
• Fragrance or flavor may be declared as fragrance or flavor rather than as every constituent, unless a specific ingredient is identified by name.

Names on U.S. cosmetic labels generally follow INCI — International Nomenclature of Cosmetic Ingredients — so you see Aqua or Water, Glycerin, Tocopherol, Retinyl palmitate, not a brand's pet nickname. INCI is a naming system. It is not a purity grade, not a "clean" badge, and not proof the product is non-comedogenic.

Sunscreen and some acne leave-ons are often OTC drugs (or cosmetic-drug combinations). Those labels carry a Drug Facts box with active ingredients listed separately from the cosmetic-style inactive list. Do not tell a Marietta client that SPF moisturizer is "just a cream so the Drug Facts panel is marketing." Photoprotection actives are regulated as drugs when the product makes a drug claim.

How to read a list on the trolley

Example order you might see on a hydrating serum:

1. Water / Aqua
2. Glycerin
3. Butylene glycol
4. Sodium hyaluronate
5. Phenoxyethanol
6. Fragrance
7. Yellow 5 (a color, often late)

Water first means water is the largest declared fraction among the greater-than-1-percent ingredients, not that the serum is "only water." Fragrance near the end often means it is present at 1 percent or less, or it is declared as the collective fragrance term. It does not mean the product is unscented. A Roswell client with fragrance sensitivity still needs the word fragrance treated as a risk flag, even when it sits last.

Do not rank strength by marketing bullets. A glycolic product that lists Glycolic Acid after several solvents may still be an effective leave-on if the free-acid percentage and pH are designed that way — which you learn from the professional usage sheet, not from Instagram. Conversely, an acid named in a huge font on the box can still be a low-percentage pH-balanced toner. The label order plus the usage sheet beat the font size.

Ingredient functions you must not mix up

Georgia kits separately list cleansers, liquid soap, skin fresheners (toners), astringents, moisturizers, and emollient creams. That is a hint that those words are not synonyms. Theory questions love to swap them.

Comedogenic versus occlusive is the highest-yield mix-up. Petrolatum is a classic occlusive and is often low on comedogenic lists. Coconut oil can be occlusive and highly comedogenic for an acne-prone jawline. If a question asks which ingredient seals water in, do not pick "the comedogenic one." If it asks which is most likely to clog, do not pick petrolatum just because it feels heavy.

Emollient creams on the Georgia kit list emphasize softening oils and esters. A moisturizer is usually a system: water, humectant, emollient, and some occlusive fraction, plus preservative. A dry, wind-chapped Augusta cheek often needs the occlusive fraction. An oily, congested T-zone in July humidity often needs humectant plus a lighter emollient, not a stripped, moisturizer-free face.

Cleansing chemistry in one paragraph

Anionic surfactants (many sulfates) foam well and can strip. Amphoteric surfactants (betaines) are common mild co-surfactants. Nonionic surfactants (many glucosides) tend to be gentler. Oil and balm cleansers dissolve makeup by like-dissolves-like, then you emulsify or follow with a water-based cleanse. Micellar waters suspend oil in surfactant micelles without a full foam. None of these is "the professional one." Match the surfactant system to the barrier in front of you.

SDS versus the product label

OSHA's Hazard Communication Standard (29 CFR 1910.1200) requires a Safety Data Sheet in a standard 16-section GHS format for hazardous chemicals in the workplace. Older MSDS sheets were not standardized the same way; current U.S. workplace language is SDS. Keep current SDS for disinfectants, acetone, alcohol, professional acids, and other workplace chemicals where the manufacturer issues one.

The product label still matters every service: directions, warnings, contact time, whether to dilute, and whether to patch-test. The SDS does not replace the cosmetic usage sheet for a facial. The usage sheet does not replace SDS Section 4 when glycolic splash hits an eye. A Gwinnett inspector-style question: where is the SDS for the EPA-registered disinfectant, and are chemicals stored in original labeled containers rather than unlabeled food cups?

EPA, OSHA, and FDA — do not merge the alphabets

• FDA: Cosmetics and many leave-on "beauty" claims. Labeling, adulteration, misbranding. Most cosmetics are not pre-approved like drugs. Drug claims (treat acne as a disease, alter the structure of the body beyond cosmetic, SPF as a drug) pull the product toward drug rules.
• OSHA: Workplace safety. Hazard communication, SDS, workplace labels (product identifier, signal word, hazard statements, pictograms, precautionary statements, supplier). Bloodborne pathogens and electrical safety live in other OSHA conversations; this chapter's OSHA hook is chemical communication.
• EPA: Environmental and many disinfectant registrations. An EPA-registered disinfectant is a pesticide product with an EPA registration number. A pretty facial mist is not an EPA-registered hospital disinfectant just because it smells like tea tree.

Georgia Rule 240-4-.05 still applies while you handle creams: products in sanitary closed containers, removed with a clean spatula or disposable, no double-dipping. Chemistry knowledge does not excuse a contaminated jar.

Adverse reactions — chemistry first, diagnosis never

An adverse reaction can be irritant (too much surfactant, too low pH, too much alcohol) or allergic (fragrance, preservative, adhesive). Your job:

1. Stop the product.
2. Remove what you can per manufacturer / SDS first aid (often rinse; do not neutralize "by feel" with a random alkali).
3. Apply only the aftercare the protocol allows (often cool compress, bland occlusive if directed).
4. Document what was used, lot if available, time, and what you observed.
5. Refer to a physician when the reaction is more than a brief, expected tingling or when the client has signs that belong in medical care.

O.C.G.A. § 43-10-1(8) still excludes diagnosis and treatment of dermatological conditions. "This cream gave you contact dermatitis" is a medical sentence. "We stopped the product, rinsed, documented, and you should see a physician" is an esthetic sentence.

Georgia scenarios

Ingredient-list trap in Decatur. A client wants "no chemicals." Water, glycerin, and phenoxyethanol are chemicals. You can offer fragrance-free, short-list products. You cannot offer a chemistry-free emulsion that still lasts in a humid Georgia cabinet.

SDS missing in a home salon. The booth rents a glycolic and an EPA disinfectant. Both bottles sit in a clear bin. There is no SDS binder or digital folder. That is a Domain 1.B failure waiting for a spill, not a filing preference.

Comedogenic confusion in Valdosta. A teen's parent refuses petrolatum because "occlusives clog." You explain that occlusive describes a film that reduces water loss, while comedogenic describes follicle clogging, and that petrolatum is a common occlusive with a relatively low comedogenic reputation compared with some plant butters. You still respect a parent preference and choose another occlusive or a dimethicone-rich cream if it fits the protocol.

Traps

• Reading the last INCI name as "the active" or the first name as "the only ingredient that matters."
• Calling fragrance-free the same as unscented (unscented may still use masking fragrance).
• Using SDS Section 3 as a substitute for the FDA cosmetic ingredient declaration, or vice versa.
• Storing acids in a rinsed yogurt cup with a piece of tape that says "peel."
• Telling a client an FDA cosmetic "treats eczema" because an emollient felt soothing.