
THE STORY OF BORIC ACID
Boric Acid: The Classic pH Regulator & Antimicrobial Aid
Boric Acid (H₃BO₃) is a traditional cosmetic and pharmaceutical raw material used for pH regulation, buffering, odor control, and mild antimicrobial support. It has long been used in eye washes, foot powders, skin lotions, bath products, and cleansing formulations where pH balance and preservative-boosting are required.
Refined from Boron Minerals for High-Purity Cosmetic Use
Boric Acid is produced by refining naturally occurring borate minerals (such as borax or kernite), followed by controlled crystallization to achieve cosmetic-grade purity. TRCkem supplies fine, low-impurity boric acid with consistent pH control properties suited for topical and personal-care formulations.
Buffer. Deodorize. Support Stability.
Functional benefits in formulations:
✅ Helps stabilize pH in mildly acidic or neutral products
✅ Acts as a deodorizing and odor-control agent
✅ Provides mild antifungal and antibacterial support in powders and washes
✅ Improves preservative efficacy in water-based systems
Commonly found in: antiseptic powders, bath salts, foot care, eyewash solutions, skin lotions, barrier creams, and medicated cleansers.
Highly Regulated – Approved Only in Select Categories
Typical usage: 0.1–5% depending on application and region.
Classified as a restricted substance in many countries due to reproductive toxicity concerns at high exposure levels.
Not allowed in leave-on cosmetics in EU, but still permitted in limited rinse-off, OTC, medicinal, and controlled-use categories (eye washes, antiseptic powders, etc.).
Must be handled with PPE and stored in dry, sealed containers away from moisture.
Always check regulatory status before use in personal-care products.
Formulator’s Queries, We Answered
1. What is Boric Acid?
Boric Acid is a mildly acidic, water-soluble compound commonly used in personal care and cosmetic products as an antiseptic, pH adjuster, and preservative. It helps maintain product stability and enhances skin and eye care formulations.
2. What is the CAS number and INCI name of Boric Acid?
CAS Number: 10043-35-3
INCI Name: Boric Acid
3. What are the benefits of Boric Acid in personal care products?
Boric Acid is valued for its:
Antimicrobial properties: Helps prevent bacterial and fungal contamination.
pH regulation: Maintains optimal acidity for skin-friendly formulations.
Mild exfoliation: Aids in the removal of dead skin cells.
Soothing effects: Used in eye and skin care to relieve irritation.
4. How does Boric Acid work in personal care formulations?
Boric Acid acts as a buffering agent, ensuring that skincare and haircare products maintain a stable pH. Its antiseptic properties make it effective in preventing microbial growth.
5. Is Boric Acid safe for all skin types?
Boric Acid is generally safe when used within recommended limits, but prolonged or high-concentration exposure may cause skin irritation, especially on sensitive skin.
6. What types of personal care products contain Boric Acid?
Boric Acid is found in:
Skin care (cleansers, toners, and acne treatments)
Eye care (eye washes and contact lens solutions)
Hair care (shampoos and scalp treatments)
Deodorants & antiperspirants
Bath products (soaking solutions for skin irritation relief)
7. Can Boric Acid be combined with other ingredients?
Yes, Boric Acid is often used alongside:
Sodium Borate (Borax) to enhance buffering capacity.
Salicylic Acid for gentle exfoliation.
Glycerin to counteract potential dryness.
8. Does Boric Acid cause any side effects?
Boric Acid is safe within regulated limits, but potential side effects include:
Skin irritation at high concentrations.
Eye discomfort if applied in high doses.
Toxicity risk if ingested in large amounts (should not be swallowed).
9. What is the recommended concentration of Boric Acid in personal care formulations?
Up to 5% in topical skin care products.
Up to 2% in eye care solutions.
Up to 3% in bath and foot soaks.
10. Is Boric Acid natural or synthetic?
Boric Acid is naturally found in volcanic regions, seawater, and certain fruits but is also industrially synthesized for cosmetic and pharmaceutical applications.
11. Where can I purchase high-quality Boric Acid for formulation purposes?
Boric Acid is available from cosmetic raw material suppliers. Ensure you choose high-purity, pharmaceutical- or cosmetic-grade Boric Acid for safe and effective formulations.