Adipic Acid

Product Description

Our high-purity Adipic Acid (C6H10O4, CAS 124-04-9) is manufactured to cosmetic-grade specification at direct factory facilities, with batch COA traceability and typical titrimetric assay documentation available on request.

As a dicarboxylic acid with pKa 4.43, adipic acid donates protons to neutralize excess alkalinity and maintain stable formulation pH, while trace metal chelation helps preserve active integrity over shelf life in aqueous systems.

Unlike citric or phosphoric acids with sharper titration curves, this non-hygroscopic buffer offers predictable, low-irritation pH control suited to niacinamide serums, AHA lotions, and sensitive-system emulsions where formulators need reliable bulk supply with consistent assay.

Product Specification

• INCI Name: ADIPIC ACID
• CAS No.: 124-04-9
• Appearance: White crystalline powder, practically odorless (Typical)
• Particle Size: 40–80 mesh (Typical)
• Solubility: Slightly soluble in water (~1.9 g/100 mL at 20°C); soluble in ethanol
• Suggested pH: Effective buffer range pH 2.5–5.5; finished formulas 4.5–5.5 (Typical)
• Assay Method: Titrimetry or HPLC; purity ≥99% (Typical)
• Shelf Life: 36 months sealed, below 30°C (Typical)
• Standard Packaging: 25 kg / 500 kg
• Storage: Keep sealed, dry, away from moisture and strong bases
• Regulatory Status: Listed in CosIng as ADIPIC ACID (buffering, masking)
• Quality & Testing: Typical COA covers assay, moisture, heavy metals within limits
• Compliance Note: For cosmetic use only; not for food or drug; handle with standard acid precautions

Key Benefits & Applications

This cosmetic-grade dicarboxylic acid delivers reliable pH buffering and formula stability for leave-on and rinse-off cosmetic systems — formulation-layer value, not a standalone skin-active.

• pH Buffering: Dicarboxylic buffering stabilizes target pH 4.5–5.5 in serums, emulsions, and cleansers at 0.05–1.0% w/w.
• Acid-Mantle Compatibility: Maintains skin-friendly formulation pH windows for daily leave-on lotions and toner bases.
• Active Protection: Reduces alkali-sensitive actives degradation from pH drift during storage and temperature cycling.
• Mild Adjustment: Lower acute acidity versus mineral acids for sensitive-system pH titration in eye-area and baby-care formulas.
• Texture Support: Optional film-forming contribution in gel bases, body washes, and hair-rinse buffering systems.

Formulation Guidelines

Use as a pH-adjusting and buffering auxiliary in aqueous cosmetic systems.

• Use Level: 0.05–1.0% w/w as buffer; titrate to target pH before adding alkali-sensitive actives.
• Process: Dissolve in warm water phase; add before heat-sensitive or pH-labile ingredients.
• Compatibility: Suitable for most anionic/nonionic systems; pre-test with high-load cationic polymers.
• pH Window: Target finished leave-on products at pH 4.5–5.5 for acid-stable preservative and active systems.
• Caution: Avoid direct contact with concentrated alkalis; recheck pH after batch scale-up.
• Synergy: Pair Niacinamide at 2–5% with adipic acid to lock serum pH near 5.0 for active stability.