What Is Peg-9 Dinicotinate?
Peg-9 Dinicotinate is a lab crafted compound that combines polyethylene glycol (PEG) with dinicotinic acid, a form of vitamin B3’s nicotinic acid. The “9” shows that the PEG segment contains nine repeating units, giving the ingredient a light, water soluble character. First explored in the late 20th century as chemists searched for gentler ways to deliver vitamin B derivatives to skin and hair, it soon found a place in cosmetic labs thanks to its multitasking nature.
To make Peg-9 Dinicotinate, manufacturers start by reacting dinicotinic acid with ethylene oxide, carefully controlling temperature and pressure so the PEG chain links to the acid in a stable way. The result is a clear to pale yellow liquid that mixes easily with water and oil phases, helping formulators create smooth, even textures.
You will spot Peg-9 Dinicotinate in a range of products, especially daily facial moisturizers, anti aging serums, leave in hair conditioners, sunscreens, sheet masks and lightweight lotions aimed at protecting skin from urban stressors.
Peg-9 Dinicotinate’s Cosmetic Benefits/Uses
Below are the main ways this versatile ingredient supports skin and hair care formulas:
- Antioxidant: Helps neutralize free radicals generated by sunlight and pollution which can lead to dullness and early signs of aging
- Hair conditioning: Coats strands with a thin hydrating layer, improving softness and manageability while reducing static
- UV filter: Adds an extra line of defense by absorbing a portion of UV rays, boosting the overall protective power of sunscreen blends
Who Can Use Peg-9 Dinicotinate
Because it is lightweight and water soluble Peg-9 Dinicotinate usually works well for dry, normal, combination and oily skin alike. Its gentle profile and low residue finish mean even sensitive skin often tolerates it, although people prone to flushing should note that the nicotinic acid portion can occasionally create a brief warm sensation.
The ingredient is made entirely through laboratory synthesis with no animal derived raw materials so it is suitable for vegans and vegetarians. As always the final product’s cruelty free status depends on the brand’s overall policies.
No data indicate that Peg-9 Dinicotinate poses a special risk to women who are pregnant or breastfeeding when used topically in cosmetic concentrations. This is not medical advice and anyone expecting or nursing should speak with a doctor before adding new skin or hair products just to be safe.
Peg-9 Dinicotinate does not increase photosensitivity. In fact its mild UV absorbing ability can slightly boost daytime protection when paired with dedicated sunscreen filters.
Potential Side Effects/Adverse Reactions
Responses to topical Peg-9 Dinicotinate vary among individuals. The points below outline potential side effects but most people will not encounter them when the ingredient is used at normal cosmetic levels.
- Temporary warmth or flushing, especially on very reactive skin
- Mild redness or tingling if applied to compromised or freshly exfoliated skin
- Allergic contact dermatitis marked by itching rash or swelling in rare cases
- Stinging or watering if the product migrates into the eyes
- Scalp heaviness or build up when overused in leave in hair products
- Heightened irritation when layered with strong acids or retinoids in the same routine
If any of these effects occur stop using the product and consult a healthcare professional for guidance.
Comedogenic Rating
Rating: 1/5. Peg-9 Dinicotinate is highly water soluble and forms only a very thin film on skin, so it is unlikely to trap oil or debris inside pores. The PEG backbone also rinses away easily, reducing residue that could otherwise build up. For these reasons most dermatology references place PEG-based esters at the low end of the comedogenic scale.
Suitable for acne-prone or breakout-prone skin in the vast majority of cases.
Because formulas differ, an overall product could still clog pores if it contains heavier oils or waxes. Always consider the full ingredient list when assessing a product’s acne friendliness.
Summary
Peg-9 Dinicotinate serves as an antioxidant, a mild UV filter and a hair conditioning agent. It scavenges free radicals through its nicotinic acid portion, absorbs a slice of UV light thanks to its conjugated ring system and leaves a weightless hydrating coat on hair and skin due to the PEG chain’s humectant nature.
While not as famous as niacinamide or the larger PEG esters it appears in a steady stream of modern moisturizers, sunscreens and leave-in conditioners because it delivers multiple perks without adding heft.
Current safety data show a very low risk of irritation or sensitization when used at cosmetic levels. Still, everyone’s skin is unique so perform a small patch test when trying any new product featuring Peg-9 Dinicotinate to confirm personal tolerance.