"A practical supplier guide to Vitamin A1 Retinol (CAS 68-26-8): what the retinoid is (C20H30O, MW 286.45, EINECS 200-683-7, yellow-to-orange crystalline, mp 61-63 C, -20 C storage), how it converts to retinoic acid to drive cell turnover and collagen, stability and packaging needs, 0.01-1% use levels, smart pairings with GHK-Cu, Argireline, squalane, urea, kojic acid, alpha-arbutin, vitamin C, azelaic/salicylic acids and citric acid, plus buyer COA notes."

-Deshangchemical-chemechemi

What Retinol Actually Does in a Formula

Retinol, also listed as vitamin A1 (CAS 68-26-8), is the fat-soluble alcohol form of vitamin A. In skin care it is the most widely used over-the-counter retinoid because it does real work without the sting that comes with prescription retinoic acid. We supply it as a yellow-to-orange crystalline material for brands building anti-aging serums, night creams, and treatment concentrates, and for labs that need a clean reference standard. You can see the full spec and packaging options on the Vitamin A1 Retinol product page.

How It Works on the Skin

Once applied, retinol is converted stepwise in the skin to retinaldehyde and then to retinoic acid, which binds the nuclear retinoid receptors (RAR and RXR). That binding changes how skin cells behave: surface keratinocytes turn over faster, the layer of dead cells thins out, and fibroblast activity shifts toward more collagen and elastin. The visible result is smoother texture, finer lines, and a more even surface after several weeks of steady use. Formulators reach for retinol when they want that renewal effect in a product that still passes a tolerability check on everyday skin.

Retinol sits in the middle of the vitamin A ladder. Retinyl esters (palmitate, acetate) are gentler but must convert several steps before they reach retinoic acid, so they act more slowly. Retinaldehyde is one step closer and is often tolerated better than people expect. Retinoic acid is the active endpoint and the strongest, but it is prescription-only in most markets and the harshest on skin. Retinol lands in the workable middle: enough conversion to perform, enough buffer to use daily. That balance is why it holds the bulk of the OTC anti-aging shelf.

Typical Specification

CAS	68-26-8
Formula	C20H30O
Molecular weight	286.45
EINECS	200-683-7
Appearance	yellow to orange crystalline
Melting point	61-63 °C
Solubility	fat-soluble; disperses in oils and organic solvents
Storage	-20 °C, protect from light (refrigerated 2-8 °C for working stock)

Stability, and Why Packaging Matters

Retinol is fragile. It oxidizes on contact with air, breaks down under light, and loses potency with heat. That is why finished products use opaque, air-restricted packaging, and why many suppliers ship it cold. In the formula itself, antioxidants such as tocopherol and encapsulation systems—liposomes, cyclodextrins, or solid-lipid particles—keep the active stable and release it slowly, so the skin sees a steady dose instead of a spike. If you are building a serum, set the preservation and antioxidant budget around the retinol rather than treating it as an afterthought.

Use Levels and Where It Shows Up

Most cosmetic leave-on products sit between 0.01% and 1.0%, with a large share of daily creams using 0.1%–0.3%. Higher percentages need stronger supporting moisturization and a clear usage warning. Beyond skin care, retinol goes into dietary supplements as a vitamin A source (capsules, drops), and into research as a reference compound for cell-culture, developmental-biology, and toxicology work. We see the same material move between all three channels, which is part of why batch-to-batch consistency matters as much as price.

Pairing It With Other Actives

Retinol performs better as part of a routine than on its own. A peptide such as GHK-Cu or Argireline supports firmness and expression-line relaxation from a different angle, so they are common companions in anti-aging stacks. To counter the dryness retinol can cause, formulators add an emollient like squalane or a humectant like urea, and a mild surfactant such as sodium lauroylsarcosinate keeps the cleanse step gentle. For tone, brighteners including kojic acid, alpha-arbutin, L-ascorbic acid, and glabridin are frequent partners. Clarifying acids—azelaic acid, salicylic acid, and capryloyl salicylic acid—are often used on alternating nights so the skin gets both renewal and decongestion without too much stacked at once. When the formula needs pH control, citric acid anhydrous is the standard adjuster.

Handling and Buying Notes

Keep retinol cold and away from light. We recommend -20 °C for long-term storage and 2-8 °C for material you are actively using. Work in a low-light area, minimize headspace, and use it within the validated shelf life of the batch. For buyers, the practical checks are assay, heavy metals, microbial limits, and a COA that matches the grade you ordered—cosmetic, food, or research. MOQs are flexible, and we can supply both raw crystal and pre-dispersed formats depending on your production line.

When you compare retinol offers, look past the headline price. Ask for the isomer profile (all-trans retinol is the form most formulas target), the solvent residue if it arrives pre-dissolved, and the oxidation markers on the COA. A fresh, properly stored batch should read pale yellow, not deep brown. We hold our material under inert, low-temperature conditions and share the batch COA up front so your QA team can clear it without a guessing game.

Bottom Line for Buyers

Retinol has been in skin care long enough that buyers know what they want from it: steady renewal, tolerable strength, and a supplier that ships it right. If you are sourcing vitamin A1 retinol for a new serum or restocking an existing one, the product page covers specs, grades, and packaging. Tell us your target concentration and format, and we will match a grade and pack size to your line.