PCA

CAS: 98-79-3 · EC: 202-700-3
Humectant
CosIng Ref: 77186
💡 For reference only. Does not constitute medical advice.
Description
Acts as a moisture-binding agent that helps draw water to the skin and maintain hydration levels in skincare formulations. Naturally occurs in human skin as part of the natural moisturizing factor, making it compatible with skin's own hydration mechanisms. While generally well-tolerated, some individuals may experience mild irritation with higher concentrations.
Synonyms
피씨에이 (ko) PCA (ja) L-2-Pyrrolidone-5-carboxylic acid pidolic acid
Properties
✗ Fragrance ✗ Preservative ✗ Colorant
Safety Rating
INTERNAL 5/10 · Moderate
Based on GHS hazard classification: H315=3, H318=5

Hazard Classification (GHS/CLP)

H-Code Description Category
H315 皮膚刺激 health
H318 嚴重眼損傷 health
H319 眼部刺激 health
H335 可能刺激呼吸道 health

Found in products

Total: 396
Product Brand Occurrences
Skin U INNO:SCENT Deep Musk Body Oil 130ml Set (+Body Guasha) Skin U 2
Skin U INNO:SCENT Shower Gel 500g (EAU DE FLORAL/SUNSET ORANGE) 2 Options To Choose Skin U 2
Sons DHT-Blocking Hair Strengthening Conditioner 200ml Sons 2
Soothing Toning Lotion Avene 2
Take Care Healthy Hair Shampoo Eva Nyc 2
The Daily Set The Ordinary 2
The Mini Icons Limited Edition Skincare Gift Set featuring Glycolic Acid The Ordinary 2
The Ordinary Multi-Peptide + Hyaluronic Acid Serum for Aging Skin - 30ml The Ordinary 2
The Ordinary Rice Lipids And Ectoin Microemulsion For Dry And Dehydrated Skin 60ml The Ordinary 2
The Ordinary The Age Support Gift Set for Fine Lines and Wrinkles The Ordinary 2
The Ordinary The Clear Set The Ordinary 2
Ultra Light Styling Cream + Wand KRISTIN ESS HAIR 2
Wild Marula™ Tangle Spray Drunk Elephant 2
★2025 Awards★ Seapuri Dr.33 Hair Ampoule 20ml Limited Triple Set Seapuri 1
2-Step Lash System Set Grande Cosmetics 1
3-In-1 Leave-In Conditioner Divi 1
AESTURA ATOBARRIER365 Cream - Skin barrier strenghtening & moisturizing cream AESTURA 1
AESTURA ATOBARRIER365 Hydro-Essence - Hydrating essence to support the moisture barrier 200ml AESTURA 1
AF1 Restructuring 10-in-1 Leave-In Conditioner Andrew Fitzsimons 1
Age Perfect Serum Le Duo L'Oréal 1
All In Restorative Leave-In Conditioner - 8.5 oz Isima 1
Alterna Caviar Anti-Aging Replenishing Moisture 147 ml Alterna 1
Anastasia Beverly Hills Brow Freeze Styling - Brow wax Clear (8g) Anastasia Beverly Hills 1
Anastasia Beverly Hills Glidr Shadow Stick Anastasia Beverly Hills 1
ARKIVE The Good Calmer Cushioning Moisture Cream 180ml Arkive 1
Avajar Rejuvenating Double V Mask Sheet 5ea Avajar 1
Awapuhi Wild Ginger Intensive Treatment - 16.9 oz Paul Mitchell 1
Babassu Oil & Mint Deep Conditioner Mielle 1
BIOSSANCE Squalane + Growth Factor Firming Moisturizer 50ml BIOSSANCE 1
Blushed & Bronzed Kit Anastasia Beverly Hills 1
Body Lotion - Fragrance Originale Moroccanoil 1
Bond Repair Intensive Leave-In Treatment Masque Alterna 1
Boots X Ole Henriksen Beauty Icons Ole Henriksen 1
CELL IN SHOT EGF Allantenol Repair Cream 70ml CELL IN SHOT 1
Ceramide Hydrating Night Serum The INKEY List 1
CeraVe Hydrating Foaming Oil Cleanser for Dry Skin 473ml CeraVe 1
CeraVe Hydrating Foaming Oil Cleanser with Squalane for Normal to Very Dry Skin 236ml CeraVe 1
Chitosan Post-styling Hair Serum for Hold & Definition - 3.38 oz Dyson 1
Clarifying Cream Cleanser with Salicylic Acid Murad 1
Clarifying Serum with Azelaic Acid Mario Badescu 1
Clear and Brighten Skincare Kit Dermalogica 1
Clear-Wash: Clarifying Detox Shampoo BREAD BEAUTY SUPPLY 1
Cocomino Glossing Shampoo Drunk Elephant 1
Cocomino Marula Cream Conditioner Drunk Elephant 1
COSRX The Peptide Collagen Lifting Glow Hydrogel Mask COSRX 1
COSRX 高濃度3%透明質酸保濕精華 20ml COSRX 1
Creamy Gentle Exfoliating Pore Perfecting Cleanser Peace Out 1
Curls Don't Lie Curl Perfecting Cream Isima 1
DALEAF Chlorella Better Root Hair Tonic 100mL Special Set (Special Gift: 50mL) (Hair Loss Relief) DALEAF 1
Dark Red Cherries Body Moisturizer - 17 oz Hempz 1
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