Potassium Methoxysalicylate

Product Description

Green Stone Swiss manufactures high-purity Potassium Methoxysalicylate under GMP-aligned process controls for professional brightening and tone-evening formulas. Each lot is released with batch-consistent assay, full technical documentation, and free sample support. Direct factory supply covers bulk demand for serums, essences, and leave-on spot-care systems.

Potassium Methoxysalicylate (4MSK; CAS 152312-71-5) is the potassium salt of 2-hydroxy-4-methoxybenzoic acid. It is used as a water-soluble brightening active that inhibits tyrosinase activity and helps modulate keratinocyte differentiation, supporting a reduction in the appearance of uneven melanin deposition. Unlike salicylic acid used as a BHA exfoliant, this methoxysalicylate salt is specified for tone-evening systems and remains stable in aqueous solution under typical cosmetic pH with good formulation compatibility.

Demand for dual-pathway brightening actives remains strong across Asian and global markets targeting dark spots and uneven skin tone. GSS supplies this high-purity grade in bulk with COA and TDS support so procurement and R&D teams can qualify Potassium Methoxysalicylate for leave-on brightening formulas and pair it with complementary tone-evening actives.

Product Specification

• INCI Name: Potassium Methoxysalicylate
• CAS No.: 152312-71-5
• Molecular Formula: C₈H₇KO₄
• Molecular Weight: 206.24 Da
• Appearance: White to off-white crystalline powder
• Purity: Typical ≥98%
• Solubility: Soluble in water; stable in aqueous solution
• Suggested pH: 5.0–7.0 in finished aqueous systems
• Storage: Store in a cool, dry place; protect from light and moisture

Key Benefits & Applications

Potassium Methoxysalicylate is a water-soluble 4MSK brightening active used in professional tone-evening and dark-spot formulas.

• Inhibits tyrosinase activity to support a reduction in the appearance of excess melanin
• Helps even skin tone and improve the look of dark spots in leave-on care
• Supports keratinocyte differentiation associated with more orderly pigment handling
• Suitable for serums, essences, spot treatments, emulsions, and sheet masks
• Typical use level: 1–3% in leave-on formulas

Formulation Guidelines

Dissolve Potassium Methoxysalicylate in the water phase and keep process temperature moderate to maintain assay and a clear aqueous profile.

• Suggested Use Level: Typical 1–3% in leave-on formulas
• pH Range: Suggested 5.0–7.0 in finished aqueous systems
• Addition: Pre-dissolve in water; add to the water phase; Suggested process temperature below 60°C
• Compatibility: Compatible with niacinamide, humectants, and most O/W emulsions; avoid strong oxidizing agents
• Combine with Niacinamide for complementary tyrosinase-pathway and tone-evening support.