WS-23 vs WS-3: The Ultimate Cooling Agent Comparison Guide for Product Formulators in 2026

For product formulators across the vaping, food, beverage, and personal care industries, choosing between WS-23 and WS-3 remains one of the most critical formulation decisions. Both compounds deliver clean, non-menthol cooling sensations, but their distinct properties make each better suited for specific applications. This guide provides an in-depth, data-driven comparison based on the latest industry research and real-world formulation experience from our laboratory team.

What Are WS-23 and WS-3?

WS-23 (N-Ethyl-p-menthane-3-carboxamide, CAS 51115-67-4) and WS-3 (N-Ethyl-2-isopropyl-5-methylcyclohexanecarboxamide) are both synthetic cooling agents developed as alternatives to traditional L-menthol. Unlike menthol, which carries a characteristic minty flavor and aroma, both WS-series agents provide flavor-neutral cooling — meaning they enhance freshness without altering your product's intended taste profile.

The global synthetic cooling agent market reached approximately $645 million USD in 2025, with WS-23 alone accounting for $247.83 million (38.41% market share) and WS-3 at $192.66 million (29.86%). This growth is primarily driven by demand from e-cigarette manufacturers, functional beverage developers, and the expanding natural cosmetics sector in Asia Pacific, which now represents 45% of global consumption.

Key Property Comparison Table

Property	WS-23	WS-3	L-Menthol
CAS Number	51115-67-4	39711-79-0	89-78-1
Molecular Formula	C10H21NO	C14H25NO	C10H20O
Molecular Weight	171.29 g/mol	223.38 g/mol	156.27 g/mol
Cooling Intensity (relative)	100 (baseline)	130	80
Cooling Onset Speed	Fastest	Medium-Fast	Immediate
Cooling Duration	15-30 minutes	30-45 minutes	10-20 minutes
Primary Cooling Location	Front of tongue & mouth	Back of mouth & throat	Full mouth & throat
Flavor Impact	Completely neutral	Neutral (slight throat bite)	Strong minty taste/aroma
Water Solubility	~0.7% (7g/L)	<0.01%	Sparingly soluble
Thermal Stability	Stable up to 200°C	Stable up to 180°C	Volatile above 70°C
FEMA Status	3804	3784	2665
Appearance	White crystalline powder	White crystalline powder	Colorless crystals

Detailed Analysis by Key Differentiators

1. Sensory Profile and Mouthfeel

This is where WS-23 and WS-3 diverge significantly:

• WS-23 delivers its cooling sensation predominantly on the front of the tongue and throughout the oral cavity. The effect is smooth, immediate, and described by sensory panelists as "clean chill" without any accompanying irritation or harshness. This makes it ideal for products where the primary consumer experience is oral — such as chewing gum, confectionery, and flavored beverages.
• WS-3 produces a more intense cooling concentrated at the back of the mouth and throat area. Formulators often describe this as having a mild "throat bite" that some consumers find desirable in e-liquids and oral care products where a sensation of "freshness depth" is valued.

In consumer preference testing conducted across 500 participants in Q1 2026, 72% preferred WS-23 for fruit-flavored beverages due to its cleaner profile, while 61% favored WS-3 in tobacco-substitute e-liquids for the added throat sensation that mimics traditional smoking mouthfeel.

2. Solubility and Formulation Compatibility

Solubility differences between these two agents have significant practical implications:

WS-23 water solubility (~7g/L or 0.7%) is substantially higher than WS-3 (<0.01%), which means:

• WS-23 disperses more easily in aqueous systems like energy drinks, flavored waters, and oral rinse formulations
• WS-23 requires less emulsifier support in oil-in-water emulsions
• WS-3 typically requires propylene glycol, ethanol, or triacetin pre-dilution before incorporation into water-based formulas

If you have experienced cloudiness when adding cooling agents to beverages, switching to WS-23 or ensuring proper pre-dilution of WS-3 will resolve the issue.

3. Thermal Stability for Manufacturing

One of WS-23's most compelling advantages is its thermal stability up to 200°C, making it suitable for processes involving high temperatures:

• Baked goods and hard candy production
• Heat-not-burn device formulations (where operating temperatures exceed 150°C)
• Aseptic processing and hot-fill beverage operations

WS-3 begins degrading around 180°C, which still covers most conventional food processing but may limit use in extreme thermal applications.

Application-Specific Recommendations

E-Cigarettes & Vaping Products

Product Type	Recommended Agent	Typical Dosage	Rationale
Disposable vapes ("ice" flavors)	WS-23 or blend	0.8% - 2.0%	Fast onset, fruit-friendly, no throat competition
Pod systems (nicotine salt)	WS-3 or WS-23	0.5% - 1.5%	WS-3 adds throat hit; WS-23 smoother
Tobacco substitute flavors	WS-3	0.3% - 1.0%	Throat sensation mimics menthol cigarette feel
Heat-not-burn cartridges	WS-23	0.5% - 1.2%	Superior thermal stability at 180°C+

Note: Recent regulatory developments in California (effective January 2025) have expanded the definition of "characterizing flavor" to include cooling sensations. Ensure compliance with local regulations regarding coolant concentration limits in inhalation products.

Food & Beverage Applications

Category	Recommended	Dosage Range	Key Benefit
Chewing gum / Mints	WS-23	0.05% - 0.2%	Clean cooling, no mint conflict
Carbonated drinks / Energy drinks	WS-23	0.02% - 0.08%	Better water solubility
Ice cream / Frozen desserts	WS-3	0.02% - 0.06%	Longer duration enhances cold perception
Hard candy / Lozenges	WS-23	0.03% - 0.15%	Thermal stability during cooking
Functional beverages	WS-23	0.01% - 0.05%	Subtle refreshment, neutral taste

Personal Care & Oral Care

• Toothpaste/Mouthwash: WS-23 at 0.08%-0.15% delivers long-lasting fresh breath without the overpowering mint that conflicts with other flavor notes
• After-sun gel / Pain relief: WS-3's longer duration (up to 45 minutes) provides extended skin-cooling relief
• Shaving gel / Aftershave: WS-23's fast-onset cooling soothes irritation immediately post-shave
• Skincare toners / Masks: WS-23 at 0.3%-0.6% provides pleasant cooling without stinging sensitive skin

Cost Considerations

WS-23 typically offers better price-performance ratio than WS-3 per unit of perceived cooling. While exact pricing varies with market conditions and order volume, WS-23 generally costs 15-25% less per kilogram than WS-3 while delivering comparable or superior cooling effects in most applications. For large-scale production runs, this difference translates into meaningful cost savings — particularly for high-volume categories like disposable vapes and confectionery.

Quality and Sourcing: What to Check

Regardless of whether you choose WS-23 or WS-3, supplier quality is paramount. When evaluating potential suppliers, always request:

1. Certificate of Analysis (COA) confirming purity ≥99%
2. Technical Data Sheet (TDS) with full specifications and handling guidelines
3. Safety Data Sheet (SDS/MSDS) compliant with GHS requirements
4. Third-party test results for heavy metals, residual solvents, and microbial contamination
5. Regulatory documentation: FDA GRAS status confirmation, FEMA number verification, EFSA approval evidence
6. Manufacturing certifications: ISO 22000, HACCP, GMP, Kosher, Halal as applicable to your target markets

Conclusion

Choose WS-23 when: You need fast-acting, flavor-neutral cooling for front-of-mouth products, aqueous formulations, or high-temperature processing. It offers the best balance of performance, solubility, cost-efficiency, and regulatory acceptance across the widest range of applications.

Choose WS-3 when: Your application benefits from stronger, longer-lasting cooling with throat emphasis — particularly tobacco-substitute e-liquids and topical products where extended duration is valuable.

Many advanced formulators now use customized WS-23/WS-3 blends to achieve precise cooling profiles that single-agent solutions cannot provide. If you are developing a new product and unsure which approach fits best, our technical team can provide sample formulations tailored to your specific requirements.

"The right cooling agent selection can differentiate a good product from a great one. In our experience, 80% of reformulation requests come down to optimizing the cooling profile — not the base flavor itself." — Baisifu Senior Formulation Chemist