POTASSIUM ASCORBYLBORATE
Commonly Found In
Overview
Potassium ascorbylborate is a synthetic vitamin C derivative combining ascorbic acid with potassium borate, designed to provide enhanced stability compared to pure ascorbic acid. Studies suggest it may help deliver antioxidant and melanin-inhibiting benefits associated with vitamin C while resisting oxidation. It is banned in EU cosmetics (Annex II/1396) due to the borate component, as boron compounds raise reproductive toxicity concerns under EU CMR regulations. It remains permitted in the US and Japan.
Also known as: Potassium Ascorbylborate, Potassium Ascorbate Borate
Key Benefits
Studies suggest potassium ascorbylborate may help deliver antioxidant protection and support skin brightening through vitamin C-related tyrosinase inhibition, with improved formulation stability compared to ascorbic acid; clinical evidence for this specific derivative is limited.
Skin Compatibility Ratings
Comedogenic Rating
No comedogenic potential documented
Source: Cosmetic chemistry literature
Irritancy Rating
Generally well tolerated; low irritancy expected based on vitamin C derivative class
Source: Cosmetic use literature
Typical Use Concentration
Range
0.5β3%
Optimal
1β2%
Banned in EU/UK cosmetics (Annex II/1396). Permitted in US and Japan. Used at lower concentrations than ascorbic acid due to improved stability.
Works Well With / Avoid
Works Well With
Avoid Combining
Use With Caution
Banned in EU/UK. More stable than ascorbic acid but borate content raises EU regulatory concerns. Alternative to consider in EU-compliant formulations: ascorbyl glucoside, sodium ascorbyl phosphate.
Commonly Found In
Global Regulation Summary
Overview of current status across major international markets.
Detailed Regional Status
| Region | Status | Max Conc. | Conditions | Source |
|---|---|---|---|---|
| πͺπΊ EU | Banned | - | - | Official β |
| πΊπΈ USA | Allowed | - | - | Official β |
| π―π΅ Japan | Allowed | - | - | Official β |
| π°π· Korea | Unknown | - | - | Official β |
| π¬π§ UK | Banned | - | Follows EU regulations (II/1396) | Official β |
π Why Regulations Differ
The EU banned potassium ascorbylborate (Annex II/1396) due to the borate moiety β boron compounds are restricted in EU cosmetics because of developmental/reproductive toxicity concerns from systemic absorption. The US and Japan do not specifically restrict borate-containing cosmetic ingredients, permitting its use in skin care formulations.
Regulation Analysis
Regional Agreement
Banned in EU, UK but allowed in USA, Japan.
Strictness Ranking
πΏ Natural Sources
Not found in nature. A synthetic vitamin C derivative combining ascorbic acid with potassium and borate for improved stability.
π How It's Made
Synthesized by complexing ascorbic acid with potassium borate under controlled pH and temperature conditions.
π Uses in Cosmetics
Used in cosmetic products primarily for skin conditioning - humectant.
π¬ Other Applications
No significant non-cosmetic uses. Ascorbic acid derivatives are widely used in food preservation and dietary supplements.
π‘ Fun Facts
- β’ Like its magnesium cousin, this ingredient was banned in the EU due to its borate component β boron compounds are suspected reproductive toxins
- β’ The search for a perfectly stable vitamin C derivative has been called skincare's 'holy grail' β and it's still not fully solved
- β’ Pure vitamin C oxidizes so quickly that some serums turn yellow-brown within weeks of opening
Related Skin Concerns
Data Sources
- β’ EU CosIng database (Annex II/1396)
- β’ EU SCCS opinion on boric acid and borates
- β’ Cosmetic chemistry literature on vitamin C derivatives
Last data verification: 2026-04-12
Learn More
Frequently Asked Questions
Why is POTASSIUM ASCORBYLBORATE banned in the EU but allowed in the US?
The EU follows a precautionary principle, banning POTASSIUM ASCORBYLBORATE under II/1396 due to potential safety concerns. The US FDA has not found sufficient evidence to prohibit its use, allowing it under different safety assessment standards. This reflects differing regulatory philosophies between the two regions.
Why is POTASSIUM ASCORBYLBORATE banned in the EU but allowed in Japan?
The EU prohibits POTASSIUM ASCORBYLBORATE (II/1396) based on their strict safety criteria. Japan's Ministry of Health, Labour and Welfare (MHLW) has evaluated the ingredient and permits its use, potentially with different safety data or usage conditions.
What is POTASSIUM ASCORBYLBORATE used for in cosmetics?
POTASSIUM ASCORBYLBORATE is primarily used for skin conditioning - humectant in cosmetic products. The ingredient is commonly found in moisturizers, lotions, and creams.
Which countries regulate POTASSIUM ASCORBYLBORATE?
POTASSIUM ASCORBYLBORATE is banned in EU, UK. The ingredient is freely allowed in JP, US.
Are there alternatives to POTASSIUM ASCORBYLBORATE?
Due to regulatory restrictions on POTASSIUM ASCORBYLBORATE, cosmetic manufacturers often use alternative ingredients with similar functions. For skin conditioning - humectant, alternatives may include other approved ingredients in the same category. Consult product labels for specific formulations, and look for products compliant with your region's regulations.
Disclaimer
The information on this website is for educational and informational purposes only and is not intended as medical advice. While we strive for accuracy based on official government databases, cosmetic regulations change frequently. Always consult with a qualified professional or refer to the latest official regulatory documents for compliance. We are not responsible for any actions taken based on the information provided here.