The World's Leading Skincare Glossary, brought to you by Lesielle

The 1st Customized Skincare System that Adapts to YOUR Changing Needs


INCI: Tartrazine Cl-19140

What is Tartrazine Cl-19140?

Yellow 5 is a synthetic lemon yellow-colored azo dye, also known as tartrazine, that belongs to the pyrazolone class of chemicals.

Use & Benefits:

Colorant: Imparts a yellow hue to products

Artificial food color: Approved by the FDA for use in food

Skin and hair care products: Formulation of creams, lotions, gels, makeup, shampoos, conditioners, and other such products

Food appeal: Artificially synthesized and added to food to make it more appealing

Cosmetics: Used in lipstick, toothpaste, mouthwash, detergent, shampoo, and vitamin pills

Pet food: Included in the food of cats, dogs, fish, birds, and small rodents

Personalized & Adaptive skincare system

Create your own custom skincare and  adapt it to your skin changes

How to create your own Personalized Skincare with Lesielle?

Icons of the lesielle custom skin care system

Step 1: Select a nourishing base compatible with your skin, and your desired moisturization level

Step 2: Complete your treatment with up to four active ingredients for consistent and occasional use.

Step 3: Insert your base and up to four actives ingredients into your Lesielle device to produce a fresh single dose of face cream on demand when you need it.

Complete your routine with a cleanser and other complimentary products and accessories.


Don't you know what Base and Actives your skin needs?

Take our personalized skincare quiz.

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The skincare system for an ever evolving skin, using recognized active ingredients with scientifically proven efficacy to create treatment tailored to each day's State of Skin. 

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